Linux 5.4.129

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Merge 5.4.129 into android11-5.4-lts

Changes in 5.4.129
	module: limit enabling module.sig_enforce
	Revert "drm/amdgpu/gfx9: fix the doorbell missing when in CGPG issue."
	Revert "drm/amdgpu/gfx10: enlarge CP_MEC_DOORBELL_RANGE_UPPER to cover full doorbell."
	drm/nouveau: wait for moving fence after pinning v2
	drm/radeon: wait for moving fence after pinning
	ARM: 9081/1: fix gcc-10 thumb2-kernel regression
	mmc: meson-gx: use memcpy_to/fromio for dram-access-quirk
	kbuild: add CONFIG_LD_IS_LLD
	arm64: link with -z norelro for LLD or aarch64-elf
	MIPS: generic: Update node names to avoid unit addresses
	spi: spi-nxp-fspi: move the register operation after the clock enable
	Revert "PCI: PM: Do not read power state in pci_enable_device_flags()"
	dmaengine: zynqmp_dma: Fix PM reference leak in zynqmp_dma_alloc_chan_resourc()
	mac80211: remove warning in ieee80211_get_sband()
	mac80211_hwsim: drop pending frames on stop
	cfg80211: call cfg80211_leave_ocb when switching away from OCB
	dmaengine: rcar-dmac: Fix PM reference leak in rcar_dmac_probe()
	dmaengine: mediatek: free the proper desc in desc_free handler
	dmaengine: mediatek: do not issue a new desc if one is still current
	dmaengine: mediatek: use GFP_NOWAIT instead of GFP_ATOMIC in prep_dma
	net: ipv4: Remove unneed BUG() function
	mac80211: drop multicast fragments
	net: ethtool: clear heap allocations for ethtool function
	ping: Check return value of function 'ping_queue_rcv_skb'
	inet: annotate date races around sk->sk_txhash
	net: phy: dp83867: perform soft reset and retain established link
	net: caif: fix memory leak in ldisc_open
	net/packet: annotate accesses to po->bind
	net/packet: annotate accesses to po->ifindex
	r8152: Avoid memcpy() over-reading of ETH_SS_STATS
	sh_eth: Avoid memcpy() over-reading of ETH_SS_STATS
	r8169: Avoid memcpy() over-reading of ETH_SS_STATS
	KVM: selftests: Fix kvm_check_cap() assertion
	net: qed: Fix memcpy() overflow of qed_dcbx_params()
	recordmcount: Correct st_shndx handling
	PCI: Add AMD RS690 quirk to enable 64-bit DMA
	net: ll_temac: Add memory-barriers for TX BD access
	net: ll_temac: Avoid ndo_start_xmit returning NETDEV_TX_BUSY
	pinctrl: stm32: fix the reported number of GPIO lines per bank
	nilfs2: fix memory leak in nilfs_sysfs_delete_device_group
	KVM: do not allow mapping valid but non-reference-counted pages
	i2c: robotfuzz-osif: fix control-request directions
	kthread_worker: split code for canceling the delayed work timer
	kthread: prevent deadlock when kthread_mod_delayed_work() races with kthread_cancel_delayed_work_sync()
	mm: add VM_WARN_ON_ONCE_PAGE() macro
	mm/rmap: remove unneeded semicolon in page_not_mapped()
	mm/rmap: use page_not_mapped in try_to_unmap()
	mm, thp: use head page in __migration_entry_wait()
	mm/thp: fix __split_huge_pmd_locked() on shmem migration entry
	mm/thp: make is_huge_zero_pmd() safe and quicker
	mm/thp: try_to_unmap() use TTU_SYNC for safe splitting
	mm/thp: fix vma_address() if virtual address below file offset
	mm/thp: fix page_address_in_vma() on file THP tails
	mm/thp: unmap_mapping_page() to fix THP truncate_cleanup_page()
	mm: thp: replace DEBUG_VM BUG with VM_WARN when unmap fails for split
	mm: page_vma_mapped_walk(): use page for pvmw->page
	mm: page_vma_mapped_walk(): settle PageHuge on entry
	mm: page_vma_mapped_walk(): use pmde for *pvmw->pmd
	mm: page_vma_mapped_walk(): prettify PVMW_MIGRATION block
	mm: page_vma_mapped_walk(): crossing page table boundary
	mm: page_vma_mapped_walk(): add a level of indentation
	mm: page_vma_mapped_walk(): use goto instead of while (1)
	mm: page_vma_mapped_walk(): get vma_address_end() earlier
	mm/thp: fix page_vma_mapped_walk() if THP mapped by ptes
	mm/thp: another PVMW_SYNC fix in page_vma_mapped_walk()
	mm, futex: fix shared futex pgoff on shmem huge page
	certs: Add wrapper function to check blacklisted binary hash
	x86/efi: move common keyring handler functions to new file
	certs: Add EFI_CERT_X509_GUID support for dbx entries
	certs: Move load_system_certificate_list to a common function
	Linux 5.4.129

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I6ba417dfeb30d91ebc61345bc057f927beeee0a9

Makefile

@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 VERSION = 5
 PATCHLEVEL = 4
-SUBLEVEL = 128
+SUBLEVEL = 129
 EXTRAVERSION =
 NAME = Kleptomaniac Octopus
 

arch/arm/kernel/setup.c

@@ -544,9 +544,11 @@ void notrace cpu_init(void)
 	 * In Thumb-2, msr with an immediate value is not allowed.
 	 */
 #ifdef CONFIG_THUMB2_KERNEL
-#define PLC	"r"
+#define PLC_l	"l"
+#define PLC_r	"r"
 #else
-#define PLC	"I"
+#define PLC_l	"I"
+#define PLC_r	"I"
 #endif
 
 	/*
@@ -568,15 +570,15 @@ void notrace cpu_init(void)
 	"msr	cpsr_c, %9"
 	    :
 	    : "r" (stk),
-	      PLC (PSR_F_BIT | PSR_I_BIT | IRQ_MODE),
+	      PLC_r (PSR_F_BIT | PSR_I_BIT | IRQ_MODE),
 	      "I" (offsetof(struct stack, irq[0])),
-	      PLC (PSR_F_BIT | PSR_I_BIT | ABT_MODE),
+	      PLC_r (PSR_F_BIT | PSR_I_BIT | ABT_MODE),
 	      "I" (offsetof(struct stack, abt[0])),
-	      PLC (PSR_F_BIT | PSR_I_BIT | UND_MODE),
+	      PLC_r (PSR_F_BIT | PSR_I_BIT | UND_MODE),
 	      "I" (offsetof(struct stack, und[0])),
-	      PLC (PSR_F_BIT | PSR_I_BIT | FIQ_MODE),
+	      PLC_r (PSR_F_BIT | PSR_I_BIT | FIQ_MODE),
 	      "I" (offsetof(struct stack, fiq[0])),
-	      PLC (PSR_F_BIT | PSR_I_BIT | SVC_MODE)
+	      PLC_l (PSR_F_BIT | PSR_I_BIT | SVC_MODE)
 	    : "r14");
 #endif
 }

arch/arm64/Makefile

@@ -10,7 +10,7 @@
 #
 # Copyright (C) 1995-2001 by Russell King
 
-LDFLAGS_vmlinux	:=--no-undefined -X -z norelro
+LDFLAGS_vmlinux	:=--no-undefined -X
 CPPFLAGS_vmlinux.lds = -DTEXT_OFFSET=$(TEXT_OFFSET)
 GZFLAGS		:=-9
 
@@ -86,17 +86,21 @@ CHECKFLAGS	+= -D__AARCH64EB__
 AS		+= -EB
 # Prefer the baremetal ELF build target, but not all toolchains include
 # it so fall back to the standard linux version if needed.
-KBUILD_LDFLAGS	+= -EB $(call ld-option, -maarch64elfb, -maarch64linuxb)
+KBUILD_LDFLAGS	+= -EB $(call ld-option, -maarch64elfb, -maarch64linuxb -z norelro)
 UTS_MACHINE	:= aarch64_be
 else
 KBUILD_CPPFLAGS	+= -mlittle-endian
 CHECKFLAGS	+= -D__AARCH64EL__
 AS		+= -EL
 # Same as above, prefer ELF but fall back to linux target if needed.
-KBUILD_LDFLAGS	+= -EL $(call ld-option, -maarch64elf, -maarch64linux)
+KBUILD_LDFLAGS	+= -EL $(call ld-option, -maarch64elf, -maarch64linux -z norelro)
 UTS_MACHINE	:= aarch64
 endif
 
+ifeq ($(CONFIG_LD_IS_LLD), y)
+KBUILD_LDFLAGS	+= -z norelro
+endif
+
 CHECKFLAGS	+= -D__aarch64__
 
 ifeq ($(CONFIG_ARM64_MODULE_PLTS),y)

arch/mips/generic/board-boston.its.S

@@ -1,22 +1,22 @@
 / {
 	images {
-		fdt@boston {
+		fdt-boston {
 			description = "img,boston Device Tree";
 			data = /incbin/("boot/dts/img/boston.dtb");
 			type = "flat_dt";
 			arch = "mips";
 			compression = "none";
-			hash@0 {
+			hash {
 				algo = "sha1";
 			};
 		};
 	};
 
 	configurations {
-		conf@boston {
+		conf-boston {
 			description = "Boston Linux kernel";
-			kernel = "kernel@0";
+			kernel = "kernel";
-			fdt = "fdt@boston";
+			fdt = "fdt-boston";
 		};
 	};
 };

arch/mips/generic/board-ni169445.its.S

@@ -1,22 +1,22 @@
 / {
 	images {
-		fdt@ni169445 {
+		fdt-ni169445 {
 			description = "NI 169445 device tree";
 			data = /incbin/("boot/dts/ni/169445.dtb");
 			type = "flat_dt";
 			arch = "mips";
 			compression = "none";
-			hash@0 {
+			hash {
 				algo = "sha1";
 			};
 		};
 	};
 
 	configurations {
-		conf@ni169445 {
+		conf-ni169445 {
 			description = "NI 169445 Linux Kernel";
-			kernel = "kernel@0";
+			kernel = "kernel";
-			fdt = "fdt@ni169445";
+			fdt = "fdt-ni169445";
 		};
 	};
 };

arch/mips/generic/board-ocelot.its.S

@@ -1,40 +1,40 @@
 /* SPDX-License-Identifier: (GPL-2.0 OR MIT) */
 / {
 	images {
-		fdt@ocelot_pcb123 {
+		fdt-ocelot_pcb123 {
 			description = "MSCC Ocelot PCB123 Device Tree";
 			data = /incbin/("boot/dts/mscc/ocelot_pcb123.dtb");
 			type = "flat_dt";
 			arch = "mips";
 			compression = "none";
-			hash@0 {
+			hash {
 				algo = "sha1";
 			};
 		};
 
-		fdt@ocelot_pcb120 {
+		fdt-ocelot_pcb120 {
 			description = "MSCC Ocelot PCB120 Device Tree";
 			data = /incbin/("boot/dts/mscc/ocelot_pcb120.dtb");
 			type = "flat_dt";
 			arch = "mips";
 			compression = "none";
-			hash@0 {
+			hash {
 				algo = "sha1";
 			};
 		};
 	};
 
 	configurations {
-		conf@ocelot_pcb123 {
+		conf-ocelot_pcb123 {
 			description = "Ocelot Linux kernel";
-			kernel = "kernel@0";
+			kernel = "kernel";
-			fdt = "fdt@ocelot_pcb123";
+			fdt = "fdt-ocelot_pcb123";
 		};
 
-		conf@ocelot_pcb120 {
+		conf-ocelot_pcb120 {
 			description = "Ocelot Linux kernel";
-			kernel = "kernel@0";
+			kernel = "kernel";
-			fdt = "fdt@ocelot_pcb120";
+			fdt = "fdt-ocelot_pcb120";
 		};
 	};
 };

arch/mips/generic/board-xilfpga.its.S

@@ -1,22 +1,22 @@
 / {
 	images {
-		fdt@xilfpga {
+		fdt-xilfpga {
 			description = "MIPSfpga (xilfpga) Device Tree";
 			data = /incbin/("boot/dts/xilfpga/nexys4ddr.dtb");
 			type = "flat_dt";
 			arch = "mips";
 			compression = "none";
-			hash@0 {
+			hash {
 				algo = "sha1";
 			};
 		};
 	};
 
 	configurations {
-		conf@xilfpga {
+		conf-xilfpga {
 			description = "MIPSfpga Linux kernel";
-			kernel = "kernel@0";
+			kernel = "kernel";
-			fdt = "fdt@xilfpga";
+			fdt = "fdt-xilfpga";
 		};
 	};
 };

arch/mips/generic/vmlinux.its.S

@@ -6,7 +6,7 @@
 	#address-cells = <ADDR_CELLS>;
 
 	images {
-		kernel@0 {
+		kernel {
 			description = KERNEL_NAME;
 			data = /incbin/(VMLINUX_BINARY);
 			type = "kernel";
@@ -15,18 +15,18 @@
 			compression = VMLINUX_COMPRESSION;
 			load = /bits/ ADDR_BITS <VMLINUX_LOAD_ADDRESS>;
 			entry = /bits/ ADDR_BITS <VMLINUX_ENTRY_ADDRESS>;
-			hash@0 {
+			hash {
 				algo = "sha1";
 			};
 		};
 	};
 
 	configurations {
-		default = "conf@default";
+		default = "conf-default";
 
-		conf@default {
+		conf-default {
 			description = "Generic Linux kernel";
-			kernel = "kernel@0";
+			kernel = "kernel";
 		};
 	};
 };

arch/x86/pci/fixup.c

@@ -779,4 +779,48 @@ DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x1571, pci_amd_enable_64bit_bar);
 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x15b1, pci_amd_enable_64bit_bar);
 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x1601, pci_amd_enable_64bit_bar);
 
+#define RS690_LOWER_TOP_OF_DRAM2	0x30
+#define RS690_LOWER_TOP_OF_DRAM2_VALID	0x1
+#define RS690_UPPER_TOP_OF_DRAM2	0x31
+#define RS690_HTIU_NB_INDEX		0xA8
+#define RS690_HTIU_NB_INDEX_WR_ENABLE	0x100
+#define RS690_HTIU_NB_DATA		0xAC
+
+/*
+ * Some BIOS implementations support RAM above 4GB, but do not configure the
+ * PCI host to respond to bus master accesses for these addresses. These
+ * implementations set the TOP_OF_DRAM_SLOT1 register correctly, so PCI DMA
+ * works as expected for addresses below 4GB.
+ *
+ * Reference: "AMD RS690 ASIC Family Register Reference Guide" (pg. 2-57)
+ * https://www.amd.com/system/files/TechDocs/43372_rs690_rrg_3.00o.pdf
+ */
+static void rs690_fix_64bit_dma(struct pci_dev *pdev)
+{
+	u32 val = 0;
+	phys_addr_t top_of_dram = __pa(high_memory - 1) + 1;
+
+	if (top_of_dram <= (1ULL << 32))
+		return;
+
+	pci_write_config_dword(pdev, RS690_HTIU_NB_INDEX,
+				RS690_LOWER_TOP_OF_DRAM2);
+	pci_read_config_dword(pdev, RS690_HTIU_NB_DATA, &val);
+
+	if (val)
+		return;
+
+	pci_info(pdev, "Adjusting top of DRAM to %pa for 64-bit DMA support\n", &top_of_dram);
+
+	pci_write_config_dword(pdev, RS690_HTIU_NB_INDEX,
+		RS690_UPPER_TOP_OF_DRAM2 | RS690_HTIU_NB_INDEX_WR_ENABLE);
+	pci_write_config_dword(pdev, RS690_HTIU_NB_DATA, top_of_dram >> 32);
+
+	pci_write_config_dword(pdev, RS690_HTIU_NB_INDEX,
+		RS690_LOWER_TOP_OF_DRAM2 | RS690_HTIU_NB_INDEX_WR_ENABLE);
+	pci_write_config_dword(pdev, RS690_HTIU_NB_DATA,
+		top_of_dram | RS690_LOWER_TOP_OF_DRAM2_VALID);
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x7910, rs690_fix_64bit_dma);
+
 #endif

certs/Kconfig

@@ -83,4 +83,13 @@ config SYSTEM_BLACKLIST_HASH_LIST
 	  wrapper to incorporate the list into the kernel.  Each <hash> should
 	  be a string of hex digits.
 
+config SYSTEM_REVOCATION_LIST
+	bool "Provide system-wide ring of revocation certificates"
+	depends on SYSTEM_BLACKLIST_KEYRING
+	depends on PKCS7_MESSAGE_PARSER=y
+	help
+	  If set, this allows revocation certificates to be stored in the
+	  blacklist keyring and implements a hook whereby a PKCS#7 message can
+	  be checked to see if it matches such a certificate.
+
 endmenu

certs/Makefile

@@ -3,7 +3,7 @@
 # Makefile for the linux kernel signature checking certificates.
 #
 
-obj-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += system_keyring.o system_certificates.o
+obj-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += system_keyring.o system_certificates.o common.o
 obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist.o
 ifneq ($(CONFIG_SYSTEM_BLACKLIST_HASH_LIST),"")
 obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist_hashes.o

certs/blacklist.c

@@ -135,6 +135,58 @@ int is_hash_blacklisted(const u8 *hash, size_t hash_len, const char *type)
 }
 EXPORT_SYMBOL_GPL(is_hash_blacklisted);
 
+int is_binary_blacklisted(const u8 *hash, size_t hash_len)
+{
+	if (is_hash_blacklisted(hash, hash_len, "bin") == -EKEYREJECTED)
+		return -EPERM;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(is_binary_blacklisted);
+
+#ifdef CONFIG_SYSTEM_REVOCATION_LIST
+/**
+ * add_key_to_revocation_list - Add a revocation certificate to the blacklist
+ * @data: The data blob containing the certificate
+ * @size: The size of data blob
+ */
+int add_key_to_revocation_list(const char *data, size_t size)
+{
+	key_ref_t key;
+
+	key = key_create_or_update(make_key_ref(blacklist_keyring, true),
+				   "asymmetric",
+				   NULL,
+				   data,
+				   size,
+				   ((KEY_POS_ALL & ~KEY_POS_SETATTR) | KEY_USR_VIEW),
+				   KEY_ALLOC_NOT_IN_QUOTA | KEY_ALLOC_BUILT_IN);
+
+	if (IS_ERR(key)) {
+		pr_err("Problem with revocation key (%ld)\n", PTR_ERR(key));
+		return PTR_ERR(key);
+	}
+
+	return 0;
+}
+
+/**
+ * is_key_on_revocation_list - Determine if the key for a PKCS#7 message is revoked
+ * @pkcs7: The PKCS#7 message to check
+ */
+int is_key_on_revocation_list(struct pkcs7_message *pkcs7)
+{
+	int ret;
+
+	ret = pkcs7_validate_trust(pkcs7, blacklist_keyring);
+
+	if (ret == 0)
+		return -EKEYREJECTED;
+
+	return -ENOKEY;
+}
+#endif
+
 /*
  * Initialise the blacklist
  */

certs/blacklist.h

@@ -1,3 +1,5 @@
 #include <linux/kernel.h>
+#include <linux/errno.h>
+#include <crypto/pkcs7.h>
 
 extern const char __initconst *const blacklist_hashes[];

certs/common.c

@@ -0,0 +1,57 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <linux/kernel.h>
+#include <linux/key.h>
+#include "common.h"
+
+int load_certificate_list(const u8 cert_list[],
+			  const unsigned long list_size,
+			  const struct key *keyring)
+{
+	key_ref_t key;
+	const u8 *p, *end;
+	size_t plen;
+
+	p = cert_list;
+	end = p + list_size;
+	while (p < end) {
+		/* Each cert begins with an ASN.1 SEQUENCE tag and must be more
+		 * than 256 bytes in size.
+		 */
+		if (end - p < 4)
+			goto dodgy_cert;
+		if (p[0] != 0x30 &&
+		    p[1] != 0x82)
+			goto dodgy_cert;
+		plen = (p[2] << 8) | p[3];
+		plen += 4;
+		if (plen > end - p)
+			goto dodgy_cert;
+
+		key = key_create_or_update(make_key_ref(keyring, 1),
+					   "asymmetric",
+					   NULL,
+					   p,
+					   plen,
+					   ((KEY_POS_ALL & ~KEY_POS_SETATTR) |
+					   KEY_USR_VIEW | KEY_USR_READ),
+					   KEY_ALLOC_NOT_IN_QUOTA |
+					   KEY_ALLOC_BUILT_IN |
+					   KEY_ALLOC_BYPASS_RESTRICTION);
+		if (IS_ERR(key)) {
+			pr_err("Problem loading in-kernel X.509 certificate (%ld)\n",
+			       PTR_ERR(key));
+		} else {
+			pr_notice("Loaded X.509 cert '%s'\n",
+				  key_ref_to_ptr(key)->description);
+			key_ref_put(key);
+		}
+		p += plen;
+	}
+
+	return 0;
+
+dodgy_cert:
+	pr_err("Problem parsing in-kernel X.509 certificate list\n");
+	return 0;
+}

certs/common.h

@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef _CERT_COMMON_H
+#define _CERT_COMMON_H
+
+int load_certificate_list(const u8 cert_list[], const unsigned long list_size,
+			  const struct key *keyring);
+
+#endif

certs/system_keyring.c

@@ -15,6 +15,7 @@
 #include <keys/asymmetric-type.h>
 #include <keys/system_keyring.h>
 #include <crypto/pkcs7.h>
+#include "common.h"
 
 static struct key *builtin_trusted_keys;
 #ifdef CONFIG_SECONDARY_TRUSTED_KEYRING
@@ -136,54 +137,10 @@ device_initcall(system_trusted_keyring_init);
  */
 static __init int load_system_certificate_list(void)
 {
-	key_ref_t key;
-	const u8 *p, *end;
-	size_t plen;
-
 	pr_notice("Loading compiled-in X.509 certificates\n");
 
-	p = system_certificate_list;
+	return load_certificate_list(system_certificate_list, system_certificate_list_size,
-	end = p + system_certificate_list_size;
+				     builtin_trusted_keys);
-	while (p < end) {
-		/* Each cert begins with an ASN.1 SEQUENCE tag and must be more
-		 * than 256 bytes in size.
-		 */
-		if (end - p < 4)
-			goto dodgy_cert;
-		if (p[0] != 0x30 &&
-		    p[1] != 0x82)
-			goto dodgy_cert;
-		plen = (p[2] << 8) | p[3];
-		plen += 4;
-		if (plen > end - p)
-			goto dodgy_cert;
-
-		key = key_create_or_update(make_key_ref(builtin_trusted_keys, 1),
-					   "asymmetric",
-					   NULL,
-					   p,
-					   plen,
-					   ((KEY_POS_ALL & ~KEY_POS_SETATTR) |
-					   KEY_USR_VIEW | KEY_USR_READ),
-					   KEY_ALLOC_NOT_IN_QUOTA |
-					   KEY_ALLOC_BUILT_IN |
-					   KEY_ALLOC_BYPASS_RESTRICTION);
-		if (IS_ERR(key)) {
-			pr_err("Problem loading in-kernel X.509 certificate (%ld)\n",
-			       PTR_ERR(key));
-		} else {
-			pr_notice("Loaded X.509 cert '%s'\n",
-				  key_ref_to_ptr(key)->description);
-			key_ref_put(key);
-		}
-		p += plen;
-	}
-
-	return 0;
-
-dodgy_cert:
-	pr_err("Problem parsing in-kernel X.509 certificate list\n");
-	return 0;
 }
 late_initcall(load_system_certificate_list);
 
@@ -241,6 +198,12 @@ int verify_pkcs7_message_sig(const void *data, size_t len,
 			pr_devel("PKCS#7 platform keyring is not available\n");
 			goto error;
 		}
+
+		ret = is_key_on_revocation_list(pkcs7);
+		if (ret != -ENOKEY) {
+			pr_devel("PKCS#7 platform key is on revocation list\n");
+			goto error;
+		}
 	}
 	ret = pkcs7_validate_trust(pkcs7, trusted_keys);
 	if (ret < 0) {

drivers/dma/mediatek/mtk-uart-apdma.c

@@ -131,10 +131,7 @@ static unsigned int mtk_uart_apdma_read(struct mtk_chan *c, unsigned int reg)
 
 static void mtk_uart_apdma_desc_free(struct virt_dma_desc *vd)
 {
-	struct dma_chan *chan = vd->tx.chan;
+	kfree(container_of(vd, struct mtk_uart_apdma_desc, vd));
-	struct mtk_chan *c = to_mtk_uart_apdma_chan(chan);
-
-	kfree(c->desc);
 }
 
 static void mtk_uart_apdma_start_tx(struct mtk_chan *c)
@@ -207,14 +204,9 @@ static void mtk_uart_apdma_start_rx(struct mtk_chan *c)
 
 static void mtk_uart_apdma_tx_handler(struct mtk_chan *c)
 {
-	struct mtk_uart_apdma_desc *d = c->desc;
-
 	mtk_uart_apdma_write(c, VFF_INT_FLAG, VFF_TX_INT_CLR_B);
 	mtk_uart_apdma_write(c, VFF_INT_EN, VFF_INT_EN_CLR_B);
 	mtk_uart_apdma_write(c, VFF_EN, VFF_EN_CLR_B);
-
-	list_del(&d->vd.node);
-	vchan_cookie_complete(&d->vd);
 }
 
 static void mtk_uart_apdma_rx_handler(struct mtk_chan *c)
@@ -245,9 +237,17 @@ static void mtk_uart_apdma_rx_handler(struct mtk_chan *c)
 
 	c->rx_status = d->avail_len - cnt;
 	mtk_uart_apdma_write(c, VFF_RPT, wg);
+}
 
-	list_del(&d->vd.node);
+static void mtk_uart_apdma_chan_complete_handler(struct mtk_chan *c)
-	vchan_cookie_complete(&d->vd);
+{
+	struct mtk_uart_apdma_desc *d = c->desc;
+
+	if (d) {
+		list_del(&d->vd.node);
+		vchan_cookie_complete(&d->vd);
+		c->desc = NULL;
+	}
 }
 
 static irqreturn_t mtk_uart_apdma_irq_handler(int irq, void *dev_id)
@@ -261,6 +261,7 @@ static irqreturn_t mtk_uart_apdma_irq_handler(int irq, void *dev_id)
 		mtk_uart_apdma_rx_handler(c);
 	else if (c->dir == DMA_MEM_TO_DEV)
 		mtk_uart_apdma_tx_handler(c);
+	mtk_uart_apdma_chan_complete_handler(c);
 	spin_unlock_irqrestore(&c->vc.lock, flags);
 
 	return IRQ_HANDLED;
@@ -348,7 +349,7 @@ static struct dma_async_tx_descriptor *mtk_uart_apdma_prep_slave_sg
 		return NULL;
 
 	/* Now allocate and setup the descriptor */
-	d = kzalloc(sizeof(*d), GFP_ATOMIC);
+	d = kzalloc(sizeof(*d), GFP_NOWAIT);
 	if (!d)
 		return NULL;
 
@@ -366,7 +367,7 @@ static void mtk_uart_apdma_issue_pending(struct dma_chan *chan)
 	unsigned long flags;
 
 	spin_lock_irqsave(&c->vc.lock, flags);
-	if (vchan_issue_pending(&c->vc)) {
+	if (vchan_issue_pending(&c->vc) && !c->desc) {
 		vd = vchan_next_desc(&c->vc);
 		c->desc = to_mtk_uart_apdma_desc(&vd->tx);
 

drivers/dma/sh/rcar-dmac.c

@@ -1855,7 +1855,7 @@ static int rcar_dmac_probe(struct platform_device *pdev)
 
 	/* Enable runtime PM and initialize the device. */
 	pm_runtime_enable(&pdev->dev);
-	ret = pm_runtime_get_sync(&pdev->dev);
+	ret = pm_runtime_resume_and_get(&pdev->dev);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "runtime PM get sync failed (%d)\n", ret);
 		return ret;

drivers/dma/xilinx/zynqmp_dma.c

@@ -467,7 +467,7 @@ static int zynqmp_dma_alloc_chan_resources(struct dma_chan *dchan)
 	struct zynqmp_dma_desc_sw *desc;
 	int i, ret;
 
-	ret = pm_runtime_get_sync(chan->dev);
+	ret = pm_runtime_resume_and_get(chan->dev);
 	if (ret < 0)
 		return ret;
 

drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c

@@ -3416,12 +3416,8 @@ static int gfx_v10_0_kiq_init_register(struct amdgpu_ring *ring)
 	if (ring->use_doorbell) {
 		WREG32_SOC15(GC, 0, mmCP_MEC_DOORBELL_RANGE_LOWER,
 			(adev->doorbell_index.kiq * 2) << 2);
-		/* If GC has entered CGPG, ringing doorbell > first page doesn't
-		 * wakeup GC. Enlarge CP_MEC_DOORBELL_RANGE_UPPER to workaround
-		 * this issue.
-		 */
 		WREG32_SOC15(GC, 0, mmCP_MEC_DOORBELL_RANGE_UPPER,
-			(adev->doorbell.size - 4));
+			(adev->doorbell_index.userqueue_end * 2) << 2);
 	}
 
 	WREG32_SOC15(GC, 0, mmCP_HQD_PQ_DOORBELL_CONTROL,

drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c

@@ -3593,12 +3593,8 @@ static int gfx_v9_0_kiq_init_register(struct amdgpu_ring *ring)
 	if (ring->use_doorbell) {
 		WREG32_SOC15(GC, 0, mmCP_MEC_DOORBELL_RANGE_LOWER,
 					(adev->doorbell_index.kiq * 2) << 2);
-		/* If GC has entered CGPG, ringing doorbell > first page doesn't
-		 * wakeup GC. Enlarge CP_MEC_DOORBELL_RANGE_UPPER to workaround
-		 * this issue.
-		 */
 		WREG32_SOC15(GC, 0, mmCP_MEC_DOORBELL_RANGE_UPPER,
-					(adev->doorbell.size - 4));
+					(adev->doorbell_index.userqueue_end * 2) << 2);
 	}
 
 	WREG32_SOC15_RLC(GC, 0, mmCP_HQD_PQ_DOORBELL_CONTROL,

drivers/gpu/drm/nouveau/nouveau_prime.c

@@ -112,7 +112,22 @@ int nouveau_gem_prime_pin(struct drm_gem_object *obj)
 	if (ret)
 		return -EINVAL;
 
-	return 0;
+	ret = ttm_bo_reserve(&nvbo->bo, false, false, NULL);
+	if (ret)
+		goto error;
+
+	if (nvbo->bo.moving)
+		ret = dma_fence_wait(nvbo->bo.moving, true);
+
+	ttm_bo_unreserve(&nvbo->bo);
+	if (ret)
+		goto error;
+
+	return ret;
+
+error:
+	nouveau_bo_unpin(nvbo);
+	return ret;
 }
 
 void nouveau_gem_prime_unpin(struct drm_gem_object *obj)

drivers/gpu/drm/radeon/radeon_prime.c

@@ -94,9 +94,19 @@ int radeon_gem_prime_pin(struct drm_gem_object *obj)
 
 	/* pin buffer into GTT */
 	ret = radeon_bo_pin(bo, RADEON_GEM_DOMAIN_GTT, NULL);
-	if (likely(ret == 0))
+	if (unlikely(ret))
-		bo->prime_shared_count++;
+		goto error;
 
+	if (bo->tbo.moving) {
+		ret = dma_fence_wait(bo->tbo.moving, false);
+		if (unlikely(ret)) {
+			radeon_bo_unpin(bo);
+			goto error;
+		}
+	}
+
+	bo->prime_shared_count++;
+error:
 	radeon_bo_unreserve(bo);
 	return ret;
 }

drivers/i2c/busses/i2c-robotfuzz-osif.c

@@ -83,7 +83,7 @@ static int osif_xfer(struct i2c_adapter *adapter, struct i2c_msg *msgs,
 			}
 		}
 
-		ret = osif_usb_read(adapter, OSIFI2C_STOP, 0, 0, NULL, 0);
+		ret = osif_usb_write(adapter, OSIFI2C_STOP, 0, 0, NULL, 0);
 		if (ret) {
 			dev_err(&adapter->dev, "failure sending STOP\n");
 			return -EREMOTEIO;
@@ -153,7 +153,7 @@ static int osif_probe(struct usb_interface *interface,
 	 * Set bus frequency. The frequency is:
 	 * 120,000,000 / ( 16 + 2 * div * 4^prescale).
 	 * Using dev = 52, prescale = 0 give 100KHz */
-	ret = osif_usb_read(&priv->adapter, OSIFI2C_SET_BIT_RATE, 52, 0,
+	ret = osif_usb_write(&priv->adapter, OSIFI2C_SET_BIT_RATE, 52, 0,
 			    NULL, 0);
 	if (ret) {
 		dev_err(&interface->dev, "failure sending bit rate");

drivers/mmc/host/meson-gx-mmc.c

@@ -166,6 +166,7 @@ struct meson_host {
 
 	unsigned int bounce_buf_size;
 	void *bounce_buf;
+	void __iomem *bounce_iomem_buf;
 	dma_addr_t bounce_dma_addr;
 	struct sd_emmc_desc *descs;
 	dma_addr_t descs_dma_addr;
@@ -737,6 +738,47 @@ static void meson_mmc_desc_chain_transfer(struct mmc_host *mmc, u32 cmd_cfg)
 	writel(start, host->regs + SD_EMMC_START);
 }
 
+/* local sg copy to buffer version with _to/fromio usage for dram_access_quirk */
+static void meson_mmc_copy_buffer(struct meson_host *host, struct mmc_data *data,
+				  size_t buflen, bool to_buffer)
+{
+	unsigned int sg_flags = SG_MITER_ATOMIC;
+	struct scatterlist *sgl = data->sg;
+	unsigned int nents = data->sg_len;
+	struct sg_mapping_iter miter;
+	unsigned int offset = 0;
+
+	if (to_buffer)
+		sg_flags |= SG_MITER_FROM_SG;
+	else
+		sg_flags |= SG_MITER_TO_SG;
+
+	sg_miter_start(&miter, sgl, nents, sg_flags);
+
+	while ((offset < buflen) && sg_miter_next(&miter)) {
+		unsigned int len;
+
+		len = min(miter.length, buflen - offset);
+
+		/* When dram_access_quirk, the bounce buffer is a iomem mapping */
+		if (host->dram_access_quirk) {
+			if (to_buffer)
+				memcpy_toio(host->bounce_iomem_buf + offset, miter.addr, len);
+			else
+				memcpy_fromio(miter.addr, host->bounce_iomem_buf + offset, len);
+		} else {
+			if (to_buffer)
+				memcpy(host->bounce_buf + offset, miter.addr, len);
+			else
+				memcpy(miter.addr, host->bounce_buf + offset, len);
+		}
+
+		offset += len;
+	}
+
+	sg_miter_stop(&miter);
+}
+
 static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
 {
 	struct meson_host *host = mmc_priv(mmc);
@@ -780,8 +822,7 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
 		if (data->flags & MMC_DATA_WRITE) {
 			cmd_cfg |= CMD_CFG_DATA_WR;
 			WARN_ON(xfer_bytes > host->bounce_buf_size);
-			sg_copy_to_buffer(data->sg, data->sg_len,
+			meson_mmc_copy_buffer(host, data, xfer_bytes, true);
-					  host->bounce_buf, xfer_bytes);
 			dma_wmb();
 		}
 
@@ -950,8 +991,7 @@ static irqreturn_t meson_mmc_irq_thread(int irq, void *dev_id)
 	if (meson_mmc_bounce_buf_read(data)) {
 		xfer_bytes = data->blksz * data->blocks;
 		WARN_ON(xfer_bytes > host->bounce_buf_size);
-		sg_copy_from_buffer(data->sg, data->sg_len,
+		meson_mmc_copy_buffer(host, data, xfer_bytes, false);
-				    host->bounce_buf, xfer_bytes);
 	}
 
 	next_cmd = meson_mmc_get_next_command(cmd);
@@ -1179,7 +1219,7 @@ static int meson_mmc_probe(struct platform_device *pdev)
 		 * instead of the DDR memory
 		 */
 		host->bounce_buf_size = SD_EMMC_SRAM_DATA_BUF_LEN;
-		host->bounce_buf = host->regs + SD_EMMC_SRAM_DATA_BUF_OFF;
+		host->bounce_iomem_buf = host->regs + SD_EMMC_SRAM_DATA_BUF_OFF;
 		host->bounce_dma_addr = res->start + SD_EMMC_SRAM_DATA_BUF_OFF;
 	} else {
 		/* data bounce buffer */

drivers/net/caif/caif_serial.c

@@ -351,6 +351,7 @@ static int ldisc_open(struct tty_struct *tty)
 	rtnl_lock();
 	result = register_netdevice(dev);
 	if (result) {
+		tty_kref_put(tty);
 		rtnl_unlock();
 		free_netdev(dev);
 		return -ENODEV;

drivers/net/ethernet/qlogic/qed/qed_dcbx.c

@@ -1293,9 +1293,11 @@ int qed_dcbx_get_config_params(struct qed_hwfn *p_hwfn,
 		p_hwfn->p_dcbx_info->set.ver_num |= DCBX_CONFIG_VERSION_STATIC;
 
 	p_hwfn->p_dcbx_info->set.enabled = dcbx_info->operational.enabled;
+	BUILD_BUG_ON(sizeof(dcbx_info->operational.params) !=
+		     sizeof(p_hwfn->p_dcbx_info->set.config.params));
 	memcpy(&p_hwfn->p_dcbx_info->set.config.params,
 	       &dcbx_info->operational.params,
-	       sizeof(struct qed_dcbx_admin_params));
+	       sizeof(p_hwfn->p_dcbx_info->set.config.params));
 	p_hwfn->p_dcbx_info->set.config.valid = true;
 
 	memcpy(params, &p_hwfn->p_dcbx_info->set, sizeof(struct qed_dcbx_set));

drivers/net/ethernet/realtek/r8169_main.c

@@ -1801,7 +1801,7 @@ static void rtl8169_get_strings(struct net_device *dev, u32 stringset, u8 *data)
 {
 	switch(stringset) {
 	case ETH_SS_STATS:
-		memcpy(data, *rtl8169_gstrings, sizeof(rtl8169_gstrings));
+		memcpy(data, rtl8169_gstrings, sizeof(rtl8169_gstrings));
 		break;
 	}
 }

drivers/net/ethernet/renesas/sh_eth.c

@@ -2322,7 +2322,7 @@ static void sh_eth_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
 {
 	switch (stringset) {
 	case ETH_SS_STATS:
-		memcpy(data, *sh_eth_gstrings_stats,
+		memcpy(data, sh_eth_gstrings_stats,
 		       sizeof(sh_eth_gstrings_stats));
 		break;
 	}

drivers/net/ethernet/xilinx/ll_temac_main.c

@@ -770,12 +770,15 @@ static void temac_start_xmit_done(struct net_device *ndev)
 	stat = be32_to_cpu(cur_p->app0);
 
 	while (stat & STS_CTRL_APP0_CMPLT) {
+		/* Make sure that the other fields are read after bd is
+		 * released by dma
+		 */
+		rmb();
 		dma_unmap_single(ndev->dev.parent, be32_to_cpu(cur_p->phys),
 				 be32_to_cpu(cur_p->len), DMA_TO_DEVICE);
 		skb = (struct sk_buff *)ptr_from_txbd(cur_p);
 		if (skb)
 			dev_consume_skb_irq(skb);
-		cur_p->app0 = 0;
 		cur_p->app1 = 0;
 		cur_p->app2 = 0;
 		cur_p->app3 = 0;
@@ -784,6 +787,12 @@ static void temac_start_xmit_done(struct net_device *ndev)
 		ndev->stats.tx_packets++;
 		ndev->stats.tx_bytes += be32_to_cpu(cur_p->len);
 
+		/* app0 must be visible last, as it is used to flag
+		 * availability of the bd
+		 */
+		smp_mb();
+		cur_p->app0 = 0;
+
 		lp->tx_bd_ci++;
 		if (lp->tx_bd_ci >= TX_BD_NUM)
 			lp->tx_bd_ci = 0;
@@ -810,6 +819,9 @@ static inline int temac_check_tx_bd_space(struct temac_local *lp, int num_frag)
 		if (cur_p->app0)
 			return NETDEV_TX_BUSY;
 
+		/* Make sure to read next bd app0 after this one */
+		rmb();
+
 		tail++;
 		if (tail >= TX_BD_NUM)
 			tail = 0;
@@ -927,6 +939,11 @@ temac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 	wmb();
 	lp->dma_out(lp, TX_TAILDESC_PTR, tail_p); /* DMA start */
 
+	if (temac_check_tx_bd_space(lp, MAX_SKB_FRAGS + 1)) {
+		netdev_info(ndev, "%s -> netif_stop_queue\n", __func__);
+		netif_stop_queue(ndev);
+	}
+
 	return NETDEV_TX_OK;
 }
 

drivers/net/phy/dp83867.c

@@ -468,16 +468,12 @@ static int dp83867_phy_reset(struct phy_device *phydev)
 {
 	int err;
 
-	err = phy_write(phydev, DP83867_CTRL, DP83867_SW_RESET);
+	err = phy_write(phydev, DP83867_CTRL, DP83867_SW_RESTART);
 	if (err < 0)
 		return err;
 
 	usleep_range(10, 20);
 
-	/* After reset FORCE_LINK_GOOD bit is set. Although the
-	 * default value should be unset. Disable FORCE_LINK_GOOD
-	 * for the phy to work properly.
-	 */
 	return phy_modify(phydev, MII_DP83867_PHYCTRL,
 			 DP83867_PHYCR_FORCE_LINK_GOOD, 0);
 }

drivers/net/usb/r8152.c

@@ -5065,7 +5065,7 @@ static void rtl8152_get_strings(struct net_device *dev, u32 stringset, u8 *data)
 {
 	switch (stringset) {
 	case ETH_SS_STATS:
-		memcpy(data, *rtl8152_gstrings, sizeof(rtl8152_gstrings));
+		memcpy(data, rtl8152_gstrings, sizeof(rtl8152_gstrings));
 		break;
 	}
 }

drivers/net/wireless/mac80211_hwsim.c

@@ -1517,8 +1517,13 @@ static int mac80211_hwsim_start(struct ieee80211_hw *hw)
 static void mac80211_hwsim_stop(struct ieee80211_hw *hw)
 {
 	struct mac80211_hwsim_data *data = hw->priv;
+
 	data->started = false;
 	hrtimer_cancel(&data->beacon_timer);
+
+	while (!skb_queue_empty(&data->pending))
+		ieee80211_free_txskb(hw, skb_dequeue(&data->pending));
+
 	wiphy_dbg(hw->wiphy, "%s\n", __func__);
 }
 

drivers/pci/pci.c

@@ -1667,11 +1667,21 @@ static int pci_enable_device_flags(struct pci_dev *dev, unsigned long flags)
 	int err;
 	int i, bars = 0;
 
-	if (atomic_inc_return(&dev->enable_cnt) > 1) {
+	/*
-		pci_update_current_state(dev, dev->current_state);
+	 * Power state could be unknown at this point, either due to a fresh
-		return 0;		/* already enabled */
+	 * boot or a device removal call.  So get the current power state
+	 * so that things like MSI message writing will behave as expected
+	 * (e.g. if the device really is in D0 at enable time).
+	 */
+	if (dev->pm_cap) {
+		u16 pmcsr;
+		pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pmcsr);
+		dev->current_state = (pmcsr & PCI_PM_CTRL_STATE_MASK);
 	}
 
+	if (atomic_inc_return(&dev->enable_cnt) > 1)
+		return 0;		/* already enabled */
+
 	bridge = pci_upstream_bridge(dev);
 	if (bridge)
 		pci_enable_bridge(bridge);

drivers/pinctrl/stm32/pinctrl-stm32.c

@@ -1153,7 +1153,7 @@ static int stm32_gpiolib_register_bank(struct stm32_pinctrl *pctl,
 	struct resource res;
 	struct reset_control *rstc;
 	int npins = STM32_GPIO_PINS_PER_BANK;
-	int bank_nr, err;
+	int bank_nr, err, i = 0;
 
 	rstc = of_reset_control_get_exclusive(np, NULL);
 	if (!IS_ERR(rstc))
@@ -1182,9 +1182,14 @@ static int stm32_gpiolib_register_bank(struct stm32_pinctrl *pctl,
 
 	of_property_read_string(np, "st,bank-name", &bank->gpio_chip.label);
 
-	if (!of_parse_phandle_with_fixed_args(np, "gpio-ranges", 3, 0, &args)) {
+	if (!of_parse_phandle_with_fixed_args(np, "gpio-ranges", 3, i, &args)) {
 		bank_nr = args.args[1] / STM32_GPIO_PINS_PER_BANK;
 		bank->gpio_chip.base = args.args[1];
+
+		npins = args.args[2];
+		while (!of_parse_phandle_with_fixed_args(np, "gpio-ranges", 3,
+							 ++i, &args))
+			npins += args.args[2];
 	} else {
 		bank_nr = pctl->nbanks;
 		bank->gpio_chip.base = bank_nr * STM32_GPIO_PINS_PER_BANK;

drivers/spi/spi-nxp-fspi.c

@@ -975,12 +975,6 @@ static int nxp_fspi_probe(struct platform_device *pdev)
 		goto err_put_ctrl;
 	}
 
-	/* Clear potential interrupts */
-	reg = fspi_readl(f, f->iobase + FSPI_INTR);
-	if (reg)
-		fspi_writel(f, reg, f->iobase + FSPI_INTR);
-
-
 	/* find the resources - controller memory mapped space */
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "fspi_mmap");
 	f->ahb_addr = devm_ioremap_resource(dev, res);
@@ -1012,6 +1006,11 @@ static int nxp_fspi_probe(struct platform_device *pdev)
 		goto err_put_ctrl;
 	}
 
+	/* Clear potential interrupts */
+	reg = fspi_readl(f, f->iobase + FSPI_INTR);
+	if (reg)
+		fspi_writel(f, reg, f->iobase + FSPI_INTR);
+
 	/* find the irq */
 	ret = platform_get_irq(pdev, 0);
 	if (ret < 0)

fs/nilfs2/sysfs.c

@@ -1054,6 +1054,7 @@ void nilfs_sysfs_delete_device_group(struct the_nilfs *nilfs)
 	nilfs_sysfs_delete_superblock_group(nilfs);
 	nilfs_sysfs_delete_segctor_group(nilfs);
 	kobject_del(&nilfs->ns_dev_kobj);
+	kobject_put(&nilfs->ns_dev_kobj);
 	kfree(nilfs->ns_dev_subgroups);
 }
 

include/keys/system_keyring.h

@@ -31,16 +31,37 @@ extern int restrict_link_by_builtin_and_secondary_trusted(
 #define restrict_link_by_builtin_and_secondary_trusted restrict_link_by_builtin_trusted
 #endif
 
+extern struct pkcs7_message *pkcs7;
 #ifdef CONFIG_SYSTEM_BLACKLIST_KEYRING
 extern int mark_hash_blacklisted(const char *hash);
 extern int is_hash_blacklisted(const u8 *hash, size_t hash_len,
 			       const char *type);
+extern int is_binary_blacklisted(const u8 *hash, size_t hash_len);
 #else
 static inline int is_hash_blacklisted(const u8 *hash, size_t hash_len,
 				      const char *type)
 {
 	return 0;
 }
+
+static inline int is_binary_blacklisted(const u8 *hash, size_t hash_len)
+{
+	return 0;
+}
+#endif
+
+#ifdef CONFIG_SYSTEM_REVOCATION_LIST
+extern int add_key_to_revocation_list(const char *data, size_t size);
+extern int is_key_on_revocation_list(struct pkcs7_message *pkcs7);
+#else
+static inline int add_key_to_revocation_list(const char *data, size_t size)
+{
+	return 0;
+}
+static inline int is_key_on_revocation_list(struct pkcs7_message *pkcs7)
+{
+	return -ENOKEY;
+}
 #endif
 
 #ifdef CONFIG_IMA_BLACKLIST_KEYRING

include/linux/huge_mm.h

@@ -259,6 +259,7 @@ struct page *follow_devmap_pud(struct vm_area_struct *vma, unsigned long addr,
 extern vm_fault_t do_huge_pmd_numa_page(struct vm_fault *vmf, pmd_t orig_pmd);
 
 extern struct page *huge_zero_page;
+extern unsigned long huge_zero_pfn;
 
 static inline bool is_huge_zero_page(struct page *page)
 {
@@ -267,7 +268,7 @@ static inline bool is_huge_zero_page(struct page *page)
 
 static inline bool is_huge_zero_pmd(pmd_t pmd)
 {
-	return is_huge_zero_page(pmd_page(pmd));
+	return READ_ONCE(huge_zero_pfn) == pmd_pfn(pmd) && pmd_present(pmd);
 }
 
 static inline bool is_huge_zero_pud(pud_t pud)
@@ -399,6 +400,11 @@ static inline bool is_huge_zero_page(struct page *page)
 	return false;
 }
 
+static inline bool is_huge_zero_pmd(pmd_t pmd)
+{
+	return false;
+}
+
 static inline bool is_huge_zero_pud(pud_t pud)
 {
 	return false;

include/linux/hugetlb.h

@@ -469,17 +469,6 @@ static inline int hstate_index(struct hstate *h)
 	return h - hstates;
 }
 
-pgoff_t __basepage_index(struct page *page);
-
-/* Return page->index in PAGE_SIZE units */
-static inline pgoff_t basepage_index(struct page *page)
-{
-	if (!PageCompound(page))
-		return page->index;
-
-	return __basepage_index(page);
-}
-
 extern int dissolve_free_huge_page(struct page *page);
 extern int dissolve_free_huge_pages(unsigned long start_pfn,
 				    unsigned long end_pfn);
@@ -695,11 +684,6 @@ static inline int hstate_index(struct hstate *h)
 	return 0;
 }
 
-static inline pgoff_t basepage_index(struct page *page)
-{
-	return page->index;
-}
-
 static inline int dissolve_free_huge_page(struct page *page)
 {
 	return 0;

include/linux/mm.h

@@ -1478,6 +1478,7 @@ struct zap_details {
 	struct address_space *check_mapping;	/* Check page->mapping if set */
 	pgoff_t	first_index;			/* Lowest page->index to unmap */
 	pgoff_t last_index;			/* Highest page->index to unmap */
+	struct page *single_page;		/* Locked page to be unmapped */
 };
 
 struct page *vm_normal_page(struct vm_area_struct *vma, unsigned long addr,
@@ -1524,6 +1525,7 @@ extern vm_fault_t handle_mm_fault(struct vm_area_struct *vma,
 extern int fixup_user_fault(struct task_struct *tsk, struct mm_struct *mm,
 			    unsigned long address, unsigned int fault_flags,
 			    bool *unlocked);
+void unmap_mapping_page(struct page *page);
 void unmap_mapping_pages(struct address_space *mapping,
 		pgoff_t start, pgoff_t nr, bool even_cows);
 void unmap_mapping_range(struct address_space *mapping,
@@ -1544,6 +1546,7 @@ static inline int fixup_user_fault(struct task_struct *tsk,
 	BUG();
 	return -EFAULT;
 }
+static inline void unmap_mapping_page(struct page *page) { }
 static inline void unmap_mapping_pages(struct address_space *mapping,
 		pgoff_t start, pgoff_t nr, bool even_cows) { }
 static inline void unmap_mapping_range(struct address_space *mapping,

include/linux/mmdebug.h

@@ -37,6 +37,18 @@ void dump_mm(const struct mm_struct *mm);
 			BUG();						\
 		}							\
 	} while (0)
+#define VM_WARN_ON_ONCE_PAGE(cond, page)	({			\
+	static bool __section(".data.once") __warned;			\
+	int __ret_warn_once = !!(cond);					\
+									\
+	if (unlikely(__ret_warn_once && !__warned)) {			\
+		dump_page(page, "VM_WARN_ON_ONCE_PAGE(" __stringify(cond)")");\
+		__warned = true;					\
+		WARN_ON(1);						\
+	}								\
+	unlikely(__ret_warn_once);					\
+})
+
 #define VM_WARN_ON(cond) (void)WARN_ON(cond)
 #define VM_WARN_ON_ONCE(cond) (void)WARN_ON_ONCE(cond)
 #define VM_WARN_ONCE(cond, format...) (void)WARN_ONCE(cond, format)
@@ -48,6 +60,7 @@ void dump_mm(const struct mm_struct *mm);
 #define VM_BUG_ON_MM(cond, mm) VM_BUG_ON(cond)
 #define VM_WARN_ON(cond) BUILD_BUG_ON_INVALID(cond)
 #define VM_WARN_ON_ONCE(cond) BUILD_BUG_ON_INVALID(cond)
+#define VM_WARN_ON_ONCE_PAGE(cond, page)  BUILD_BUG_ON_INVALID(cond)
 #define VM_WARN_ONCE(cond, format...) BUILD_BUG_ON_INVALID(cond)
 #define VM_WARN(cond, format...) BUILD_BUG_ON_INVALID(cond)
 #endif

include/linux/pagemap.h

@@ -397,7 +397,7 @@ static inline struct page *read_mapping_page(struct address_space *mapping,
 }
 
 /*
- * Get index of the page with in radix-tree
+ * Get index of the page within radix-tree (but not for hugetlb pages).
  * (TODO: remove once hugetlb pages will have ->index in PAGE_SIZE)
  */
 static inline pgoff_t page_to_index(struct page *page)
@@ -416,15 +416,16 @@ static inline pgoff_t page_to_index(struct page *page)
 	return pgoff;
 }
 
+extern pgoff_t hugetlb_basepage_index(struct page *page);
+
 /*
- * Get the offset in PAGE_SIZE.
+ * Get the offset in PAGE_SIZE (even for hugetlb pages).
- * (TODO: hugepage should have ->index in PAGE_SIZE)
+ * (TODO: hugetlb pages should have ->index in PAGE_SIZE)
  */
 static inline pgoff_t page_to_pgoff(struct page *page)
 {
-	if (unlikely(PageHeadHuge(page)))
+	if (unlikely(PageHuge(page)))
-		return page->index << compound_order(page);
+		return hugetlb_basepage_index(page);
-
 	return page_to_index(page);
 }
 

include/linux/rmap.h

@@ -98,7 +98,8 @@ enum ttu_flags {
 					 * do a final flush if necessary */
 	TTU_RMAP_LOCKED		= 0x80,	/* do not grab rmap lock:
 					 * caller holds it */
-	TTU_SPLIT_FREEZE	= 0x100,		/* freeze pte under splitting thp */
+	TTU_SPLIT_FREEZE	= 0x100, /* freeze pte under splitting thp */
+	TTU_SYNC		= 0x200, /* avoid racy checks with PVMW_SYNC */
 };
 
 #ifdef CONFIG_MMU

include/net/sock.h

@@ -1873,7 +1873,8 @@ static inline u32 net_tx_rndhash(void)
 
 static inline void sk_set_txhash(struct sock *sk)
 {
-	sk->sk_txhash = net_tx_rndhash();
+	/* This pairs with READ_ONCE() in skb_set_hash_from_sk() */
+	WRITE_ONCE(sk->sk_txhash, net_tx_rndhash());
 }
 
 static inline void sk_rethink_txhash(struct sock *sk)
@@ -2138,9 +2139,12 @@ static inline void sock_poll_wait(struct file *filp, struct socket *sock,
 
 static inline void skb_set_hash_from_sk(struct sk_buff *skb, struct sock *sk)
 {
-	if (sk->sk_txhash) {
+	/* This pairs with WRITE_ONCE() in sk_set_txhash() */
+	u32 txhash = READ_ONCE(sk->sk_txhash);
+
+	if (txhash) {
 		skb->l4_hash = 1;
-		skb->hash = sk->sk_txhash;
+		skb->hash = txhash;
 	}
 }
 

kernel/futex.c

@@ -738,7 +738,7 @@ again:
 
 		key->both.offset |= FUT_OFF_INODE; /* inode-based key */
 		key->shared.i_seq = get_inode_sequence_number(inode);
-		key->shared.pgoff = basepage_index(tail);
+		key->shared.pgoff = page_to_pgoff(tail);
 		rcu_read_unlock();
 	}
 

kernel/kthread.c

@@ -1040,8 +1040,38 @@ void kthread_flush_work(struct kthread_work *work)
 EXPORT_SYMBOL_GPL(kthread_flush_work);
 
 /*
- * This function removes the work from the worker queue. Also it makes sure
+ * Make sure that the timer is neither set nor running and could
- * that it won't get queued later via the delayed work's timer.
+ * not manipulate the work list_head any longer.
+ *
+ * The function is called under worker->lock. The lock is temporary
+ * released but the timer can't be set again in the meantime.
+ */
+static void kthread_cancel_delayed_work_timer(struct kthread_work *work,
+					      unsigned long *flags)
+{
+	struct kthread_delayed_work *dwork =
+		container_of(work, struct kthread_delayed_work, work);
+	struct kthread_worker *worker = work->worker;
+
+	/*
+	 * del_timer_sync() must be called to make sure that the timer
+	 * callback is not running. The lock must be temporary released
+	 * to avoid a deadlock with the callback. In the meantime,
+	 * any queuing is blocked by setting the canceling counter.
+	 */
+	work->canceling++;
+	raw_spin_unlock_irqrestore(&worker->lock, *flags);
+	del_timer_sync(&dwork->timer);
+	raw_spin_lock_irqsave(&worker->lock, *flags);
+	work->canceling--;
+}
+
+/*
+ * This function removes the work from the worker queue.
+ *
+ * It is called under worker->lock. The caller must make sure that
+ * the timer used by delayed work is not running, e.g. by calling
+ * kthread_cancel_delayed_work_timer().
  *
  * The work might still be in use when this function finishes. See the
  * current_work proceed by the worker.
@@ -1049,28 +1079,8 @@ EXPORT_SYMBOL_GPL(kthread_flush_work);
  * Return: %true if @work was pending and successfully canceled,
  *	%false if @work was not pending
  */
-static bool __kthread_cancel_work(struct kthread_work *work, bool is_dwork,
+static bool __kthread_cancel_work(struct kthread_work *work)
-				  unsigned long *flags)
 {
-	/* Try to cancel the timer if exists. */
-	if (is_dwork) {
-		struct kthread_delayed_work *dwork =
-			container_of(work, struct kthread_delayed_work, work);
-		struct kthread_worker *worker = work->worker;
-
-		/*
-		 * del_timer_sync() must be called to make sure that the timer
-		 * callback is not running. The lock must be temporary released
-		 * to avoid a deadlock with the callback. In the meantime,
-		 * any queuing is blocked by setting the canceling counter.
-		 */
-		work->canceling++;
-		raw_spin_unlock_irqrestore(&worker->lock, *flags);
-		del_timer_sync(&dwork->timer);
-		raw_spin_lock_irqsave(&worker->lock, *flags);
-		work->canceling--;
-	}
-
 	/*
 	 * Try to remove the work from a worker list. It might either
 	 * be from worker->work_list or from worker->delayed_work_list.
@@ -1124,11 +1134,23 @@ bool kthread_mod_delayed_work(struct kthread_worker *worker,
 	/* Work must not be used with >1 worker, see kthread_queue_work() */
 	WARN_ON_ONCE(work->worker != worker);
 
-	/* Do not fight with another command that is canceling this work. */
+	/*
+	 * Temporary cancel the work but do not fight with another command
+	 * that is canceling the work as well.
+	 *
+	 * It is a bit tricky because of possible races with another
+	 * mod_delayed_work() and cancel_delayed_work() callers.
+	 *
+	 * The timer must be canceled first because worker->lock is released
+	 * when doing so. But the work can be removed from the queue (list)
+	 * only when it can be queued again so that the return value can
+	 * be used for reference counting.
+	 */
+	kthread_cancel_delayed_work_timer(work, &flags);
 	if (work->canceling)
 		goto out;
+	ret = __kthread_cancel_work(work);
 
-	ret = __kthread_cancel_work(work, true, &flags);
 fast_queue:
 	__kthread_queue_delayed_work(worker, dwork, delay, &wake_q);
 out:
@@ -1153,7 +1175,10 @@ static bool __kthread_cancel_work_sync(struct kthread_work *work, bool is_dwork)
 	/* Work must not be used with >1 worker, see kthread_queue_work(). */
 	WARN_ON_ONCE(work->worker != worker);
 
-	ret = __kthread_cancel_work(work, is_dwork, &flags);
+	if (is_dwork)
+		kthread_cancel_delayed_work_timer(work, &flags);
+
+	ret = __kthread_cancel_work(work);
 
 	if (worker->current_work != work)
 		goto out_fast;

kernel/module.c

@@ -268,9 +268,18 @@ static void module_assert_mutex_or_preempt(void)
 #endif
 }
 
+#ifdef CONFIG_MODULE_SIG
 static bool sig_enforce = IS_ENABLED(CONFIG_MODULE_SIG_FORCE);
 module_param(sig_enforce, bool_enable_only, 0644);
 
+void set_module_sig_enforced(void)
+{
+	sig_enforce = true;
+}
+#else
+#define sig_enforce false
+#endif
+
 /*
  * Export sig_enforce kernel cmdline parameter to allow other subsystems rely
  * on that instead of directly to CONFIG_MODULE_SIG_FORCE config.
@@ -281,11 +290,6 @@ bool is_module_sig_enforced(void)
 }
 EXPORT_SYMBOL(is_module_sig_enforced);
 
-void set_module_sig_enforced(void)
-{
-	sig_enforce = true;
-}
-
 /* Block module loading/unloading? */
 int modules_disabled = 0;
 core_param(nomodule, modules_disabled, bint, 0);

mm/huge_memory.c

@@ -61,6 +61,7 @@ static struct shrinker deferred_split_shrinker;
 
 static atomic_t huge_zero_refcount;
 struct page *huge_zero_page __read_mostly;
+unsigned long huge_zero_pfn __read_mostly = ~0UL;
 
 bool transparent_hugepage_enabled(struct vm_area_struct *vma)
 {
@@ -97,6 +98,7 @@ retry:
 		__free_pages(zero_page, compound_order(zero_page));
 		goto retry;
 	}
+	WRITE_ONCE(huge_zero_pfn, page_to_pfn(zero_page));
 
 	/* We take additional reference here. It will be put back by shrinker */
 	atomic_set(&huge_zero_refcount, 2);
@@ -146,6 +148,7 @@ static unsigned long shrink_huge_zero_page_scan(struct shrinker *shrink,
 	if (atomic_cmpxchg(&huge_zero_refcount, 1, 0) == 1) {
 		struct page *zero_page = xchg(&huge_zero_page, NULL);
 		BUG_ON(zero_page == NULL);
+		WRITE_ONCE(huge_zero_pfn, ~0UL);
 		__free_pages(zero_page, compound_order(zero_page));
 		return HPAGE_PMD_NR;
 	}
@@ -2155,7 +2158,7 @@ static void __split_huge_pmd_locked(struct vm_area_struct *vma, pmd_t *pmd,
 	count_vm_event(THP_SPLIT_PMD);
 
 	if (!vma_is_anonymous(vma)) {
-		_pmd = pmdp_huge_clear_flush_notify(vma, haddr, pmd);
+		old_pmd = pmdp_huge_clear_flush_notify(vma, haddr, pmd);
 		/*
 		 * We are going to unmap this huge page. So
 		 * just go ahead and zap it
@@ -2164,16 +2167,25 @@ static void __split_huge_pmd_locked(struct vm_area_struct *vma, pmd_t *pmd,
 			zap_deposited_table(mm, pmd);
 		if (vma_is_dax(vma))
 			return;
-		page = pmd_page(_pmd);
+		if (unlikely(is_pmd_migration_entry(old_pmd))) {
-		if (!PageDirty(page) && pmd_dirty(_pmd))
+			swp_entry_t entry;
-			set_page_dirty(page);
+
-		if (!PageReferenced(page) && pmd_young(_pmd))
+			entry = pmd_to_swp_entry(old_pmd);
-			SetPageReferenced(page);
+			page = migration_entry_to_page(entry);
-		page_remove_rmap(page, true);
+		} else {
-		put_page(page);
+			page = pmd_page(old_pmd);
+			if (!PageDirty(page) && pmd_dirty(old_pmd))
+				set_page_dirty(page);
+			if (!PageReferenced(page) && pmd_young(old_pmd))
+				SetPageReferenced(page);
+			page_remove_rmap(page, true);
+			put_page(page);
+		}
 		add_mm_counter(mm, mm_counter_file(page), -HPAGE_PMD_NR);
 		return;
-	} else if (pmd_trans_huge(*pmd) && is_huge_zero_pmd(*pmd)) {
+	}
+
+	if (is_huge_zero_pmd(*pmd)) {
 		/*
 		 * FIXME: Do we want to invalidate secondary mmu by calling
 		 * mmu_notifier_invalidate_range() see comments below inside
@@ -2449,16 +2461,16 @@ void vma_adjust_trans_huge(struct vm_area_struct *vma,
 static void unmap_page(struct page *page)
 {
 	enum ttu_flags ttu_flags = TTU_IGNORE_MLOCK | TTU_IGNORE_ACCESS |
-		TTU_RMAP_LOCKED | TTU_SPLIT_HUGE_PMD;
+		TTU_RMAP_LOCKED | TTU_SPLIT_HUGE_PMD | TTU_SYNC;
-	bool unmap_success;
 
 	VM_BUG_ON_PAGE(!PageHead(page), page);
 
 	if (PageAnon(page))
 		ttu_flags |= TTU_SPLIT_FREEZE;
 
-	unmap_success = try_to_unmap(page, ttu_flags);
+	try_to_unmap(page, ttu_flags);
-	VM_BUG_ON_PAGE(!unmap_success, page);
+
+	VM_WARN_ON_ONCE_PAGE(page_mapped(page), page);
 }
 
 static void remap_page(struct page *page)
@@ -2737,7 +2749,7 @@ int split_huge_page_to_list(struct page *page, struct list_head *list)
 	struct deferred_split *ds_queue = get_deferred_split_queue(page);
 	struct anon_vma *anon_vma = NULL;
 	struct address_space *mapping = NULL;
-	int count, mapcount, extra_pins, ret;
+	int extra_pins, ret;
 	bool mlocked;
 	unsigned long flags;
 	pgoff_t end;
@@ -2799,7 +2811,6 @@ int split_huge_page_to_list(struct page *page, struct list_head *list)
 
 	mlocked = PageMlocked(page);
 	unmap_page(head);
-	VM_BUG_ON_PAGE(compound_mapcount(head), head);
 
 	/* Make sure the page is not on per-CPU pagevec as it takes pin */
 	if (mlocked)
@@ -2822,9 +2833,7 @@ int split_huge_page_to_list(struct page *page, struct list_head *list)
 
 	/* Prevent deferred_split_scan() touching ->_refcount */
 	spin_lock(&ds_queue->split_queue_lock);
-	count = page_count(head);
+	if (page_ref_freeze(head, 1 + extra_pins)) {
-	mapcount = total_mapcount(head);
-	if (!mapcount && page_ref_freeze(head, 1 + extra_pins)) {
 		if (!list_empty(page_deferred_list(head))) {
 			ds_queue->split_queue_len--;
 			list_del(page_deferred_list(head));
@@ -2845,16 +2854,9 @@ int split_huge_page_to_list(struct page *page, struct list_head *list)
 		} else
 			ret = 0;
 	} else {
-		if (IS_ENABLED(CONFIG_DEBUG_VM) && mapcount) {
-			pr_alert("total_mapcount: %u, page_count(): %u\n",
-					mapcount, count);
-			if (PageTail(page))
-				dump_page(head, NULL);
-			dump_page(page, "total_mapcount(head) > 0");
-			BUG();
-		}
 		spin_unlock(&ds_queue->split_queue_lock);
-fail:		if (mapping)
+fail:
+		if (mapping)
 			xa_unlock(&mapping->i_pages);
 		spin_unlock_irqrestore(&pgdata->lru_lock, flags);
 		remap_page(head);

mm/hugetlb.c

@@ -1461,15 +1461,12 @@ int PageHeadHuge(struct page *page_head)
 	return get_compound_page_dtor(page_head) == free_huge_page;
 }
 
-pgoff_t __basepage_index(struct page *page)
+pgoff_t hugetlb_basepage_index(struct page *page)
 {
 	struct page *page_head = compound_head(page);
 	pgoff_t index = page_index(page_head);
 	unsigned long compound_idx;
 
-	if (!PageHuge(page_head))
-		return page_index(page);
-
 	if (compound_order(page_head) >= MAX_ORDER)
 		compound_idx = page_to_pfn(page) - page_to_pfn(page_head);
 	else

mm/internal.h

@@ -339,27 +339,52 @@ static inline void mlock_migrate_page(struct page *newpage, struct page *page)
 extern pmd_t maybe_pmd_mkwrite(pmd_t pmd, struct vm_area_struct *vma);
 
 /*
- * At what user virtual address is page expected in @vma?
+ * At what user virtual address is page expected in vma?
+ * Returns -EFAULT if all of the page is outside the range of vma.
+ * If page is a compound head, the entire compound page is considered.
  */
-static inline unsigned long
-__vma_address(struct page *page, struct vm_area_struct *vma)
-{
-	pgoff_t pgoff = page_to_pgoff(page);
-	return vma->vm_start + ((pgoff - vma->vm_pgoff) << PAGE_SHIFT);
-}
-
 static inline unsigned long
 vma_address(struct page *page, struct vm_area_struct *vma)
 {
-	unsigned long start, end;
+	pgoff_t pgoff;
+	unsigned long address;
 
-	start = __vma_address(page, vma);
+	VM_BUG_ON_PAGE(PageKsm(page), page);	/* KSM page->index unusable */
-	end = start + PAGE_SIZE * (hpage_nr_pages(page) - 1);
+	pgoff = page_to_pgoff(page);
+	if (pgoff >= vma->vm_pgoff) {
+		address = vma->vm_start +
+			((pgoff - vma->vm_pgoff) << PAGE_SHIFT);
+		/* Check for address beyond vma (or wrapped through 0?) */
+		if (address < vma->vm_start || address >= vma->vm_end)
+			address = -EFAULT;
+	} else if (PageHead(page) &&
+		   pgoff + compound_nr(page) - 1 >= vma->vm_pgoff) {
+		/* Test above avoids possibility of wrap to 0 on 32-bit */
+		address = vma->vm_start;
+	} else {
+		address = -EFAULT;
+	}
+	return address;
+}
 
-	/* page should be within @vma mapping range */
+/*
-	VM_BUG_ON_VMA(end < vma->vm_start || start >= vma->vm_end, vma);
+ * Then at what user virtual address will none of the page be found in vma?
+ * Assumes that vma_address() already returned a good starting address.
+ * If page is a compound head, the entire compound page is considered.
+ */
+static inline unsigned long
+vma_address_end(struct page *page, struct vm_area_struct *vma)
+{
+	pgoff_t pgoff;
+	unsigned long address;
 
-	return max(start, vma->vm_start);
+	VM_BUG_ON_PAGE(PageKsm(page), page);	/* KSM page->index unusable */
+	pgoff = page_to_pgoff(page) + compound_nr(page);
+	address = vma->vm_start + ((pgoff - vma->vm_pgoff) << PAGE_SHIFT);
+	/* Check for address beyond vma (or wrapped through 0?) */
+	if (address < vma->vm_start || address > vma->vm_end)
+		address = vma->vm_end;
+	return address;
 }
 
 static inline struct file *maybe_unlock_mmap_for_io(struct vm_fault *vmf,

mm/memory.c

@@ -1184,7 +1184,18 @@ static inline unsigned long zap_pmd_range(struct mmu_gather *tlb,
 			else if (zap_huge_pmd(tlb, vma, pmd, addr))
 				goto next;
 			/* fall through */
+		} else if (details && details->single_page &&
+			   PageTransCompound(details->single_page) &&
+			   next - addr == HPAGE_PMD_SIZE && pmd_none(*pmd)) {
+			spinlock_t *ptl = pmd_lock(tlb->mm, pmd);
+			/*
+			 * Take and drop THP pmd lock so that we cannot return
+			 * prematurely, while zap_huge_pmd() has cleared *pmd,
+			 * but not yet decremented compound_mapcount().
+			 */
+			spin_unlock(ptl);
 		}
+
 		/*
 		 * Here there can be other concurrent MADV_DONTNEED or
 		 * trans huge page faults running, and if the pmd is
@@ -2788,6 +2799,36 @@ static inline void unmap_mapping_range_tree(struct rb_root_cached *root,
 	}
 }
 
+/**
+ * unmap_mapping_page() - Unmap single page from processes.
+ * @page: The locked page to be unmapped.
+ *
+ * Unmap this page from any userspace process which still has it mmaped.
+ * Typically, for efficiency, the range of nearby pages has already been
+ * unmapped by unmap_mapping_pages() or unmap_mapping_range().  But once
+ * truncation or invalidation holds the lock on a page, it may find that
+ * the page has been remapped again: and then uses unmap_mapping_page()
+ * to unmap it finally.
+ */
+void unmap_mapping_page(struct page *page)
+{
+	struct address_space *mapping = page->mapping;
+	struct zap_details details = { };
+
+	VM_BUG_ON(!PageLocked(page));
+	VM_BUG_ON(PageTail(page));
+
+	details.check_mapping = mapping;
+	details.first_index = page->index;
+	details.last_index = page->index + hpage_nr_pages(page) - 1;
+	details.single_page = page;
+
+	i_mmap_lock_write(mapping);
+	if (unlikely(!RB_EMPTY_ROOT(&mapping->i_mmap.rb_root)))
+		unmap_mapping_range_tree(&mapping->i_mmap, &details);
+	i_mmap_unlock_write(mapping);
+}
+
 /**
  * unmap_mapping_pages() - Unmap pages from processes.
  * @mapping: The address space containing pages to be unmapped.

mm/migrate.c

@@ -321,6 +321,7 @@ void __migration_entry_wait(struct mm_struct *mm, pte_t *ptep,
 		goto out;
 
 	page = migration_entry_to_page(entry);
+	page = compound_head(page);
 
 	/*
 	 * Once page cache replacement of page migration started, page_count

mm/page_vma_mapped.c

@@ -111,6 +111,13 @@ static bool check_pte(struct page_vma_mapped_walk *pvmw)
 	return pfn_in_hpage(pvmw->page, pfn);
 }
 
+static void step_forward(struct page_vma_mapped_walk *pvmw, unsigned long size)
+{
+	pvmw->address = (pvmw->address + size) & ~(size - 1);
+	if (!pvmw->address)
+		pvmw->address = ULONG_MAX;
+}
+
 /**
  * page_vma_mapped_walk - check if @pvmw->page is mapped in @pvmw->vma at
  * @pvmw->address
@@ -139,6 +146,7 @@ bool page_vma_mapped_walk(struct page_vma_mapped_walk *pvmw)
 {
 	struct mm_struct *mm = pvmw->vma->vm_mm;
 	struct page *page = pvmw->page;
+	unsigned long end;
 	pgd_t *pgd;
 	p4d_t *p4d;
 	pud_t *pud;
@@ -148,10 +156,11 @@ bool page_vma_mapped_walk(struct page_vma_mapped_walk *pvmw)
 	if (pvmw->pmd && !pvmw->pte)
 		return not_found(pvmw);
 
-	if (pvmw->pte)
+	if (unlikely(PageHuge(page))) {
-		goto next_pte;
+		/* The only possible mapping was handled on last iteration */
+		if (pvmw->pte)
+			return not_found(pvmw);
 
-	if (unlikely(PageHuge(pvmw->page))) {
 		/* when pud is not present, pte will be NULL */
 		pvmw->pte = huge_pte_offset(mm, pvmw->address, page_size(page));
 		if (!pvmw->pte)
@@ -163,78 +172,108 @@ bool page_vma_mapped_walk(struct page_vma_mapped_walk *pvmw)
 			return not_found(pvmw);
 		return true;
 	}
-restart:
-	pgd = pgd_offset(mm, pvmw->address);
-	if (!pgd_present(*pgd))
-		return false;
-	p4d = p4d_offset(pgd, pvmw->address);
-	if (!p4d_present(*p4d))
-		return false;
-	pud = pud_offset(p4d, pvmw->address);
-	if (!pud_present(*pud))
-		return false;
-	pvmw->pmd = pmd_offset(pud, pvmw->address);
-	/*
-	 * Make sure the pmd value isn't cached in a register by the
-	 * compiler and used as a stale value after we've observed a
-	 * subsequent update.
-	 */
-	pmde = READ_ONCE(*pvmw->pmd);
-	if (pmd_trans_huge(pmde) || is_pmd_migration_entry(pmde)) {
-		pvmw->ptl = pmd_lock(mm, pvmw->pmd);
-		if (likely(pmd_trans_huge(*pvmw->pmd))) {
-			if (pvmw->flags & PVMW_MIGRATION)
-				return not_found(pvmw);
-			if (pmd_page(*pvmw->pmd) != page)
-				return not_found(pvmw);
-			return true;
-		} else if (!pmd_present(*pvmw->pmd)) {
-			if (thp_migration_supported()) {
-				if (!(pvmw->flags & PVMW_MIGRATION))
-					return not_found(pvmw);
-				if (is_migration_entry(pmd_to_swp_entry(*pvmw->pmd))) {
-					swp_entry_t entry = pmd_to_swp_entry(*pvmw->pmd);
 
-					if (migration_entry_to_page(entry) != page)
+	/*
-						return not_found(pvmw);
+	 * Seek to next pte only makes sense for THP.
-					return true;
+	 * But more important than that optimization, is to filter out
-				}
+	 * any PageKsm page: whose page->index misleads vma_address()
+	 * and vma_address_end() to disaster.
+	 */
+	end = PageTransCompound(page) ?
+		vma_address_end(page, pvmw->vma) :
+		pvmw->address + PAGE_SIZE;
+	if (pvmw->pte)
+		goto next_pte;
+restart:
+	do {
+		pgd = pgd_offset(mm, pvmw->address);
+		if (!pgd_present(*pgd)) {
+			step_forward(pvmw, PGDIR_SIZE);
+			continue;
+		}
+		p4d = p4d_offset(pgd, pvmw->address);
+		if (!p4d_present(*p4d)) {
+			step_forward(pvmw, P4D_SIZE);
+			continue;
+		}
+		pud = pud_offset(p4d, pvmw->address);
+		if (!pud_present(*pud)) {
+			step_forward(pvmw, PUD_SIZE);
+			continue;
+		}
+
+		pvmw->pmd = pmd_offset(pud, pvmw->address);
+		/*
+		 * Make sure the pmd value isn't cached in a register by the
+		 * compiler and used as a stale value after we've observed a
+		 * subsequent update.
+		 */
+		pmde = READ_ONCE(*pvmw->pmd);
+
+		if (pmd_trans_huge(pmde) || is_pmd_migration_entry(pmde)) {
+			pvmw->ptl = pmd_lock(mm, pvmw->pmd);
+			pmde = *pvmw->pmd;
+			if (likely(pmd_trans_huge(pmde))) {
+				if (pvmw->flags & PVMW_MIGRATION)
+					return not_found(pvmw);
+				if (pmd_page(pmde) != page)
+					return not_found(pvmw);
+				return true;
+			}
+			if (!pmd_present(pmde)) {
+				swp_entry_t entry;
+
+				if (!thp_migration_supported() ||
+				    !(pvmw->flags & PVMW_MIGRATION))
+					return not_found(pvmw);
+				entry = pmd_to_swp_entry(pmde);
+				if (!is_migration_entry(entry) ||
+				    migration_entry_to_page(entry) != page)
+					return not_found(pvmw);
+				return true;
 			}
-			return not_found(pvmw);
-		} else {
 			/* THP pmd was split under us: handle on pte level */
 			spin_unlock(pvmw->ptl);
 			pvmw->ptl = NULL;
+		} else if (!pmd_present(pmde)) {
+			/*
+			 * If PVMW_SYNC, take and drop THP pmd lock so that we
+			 * cannot return prematurely, while zap_huge_pmd() has
+			 * cleared *pmd but not decremented compound_mapcount().
+			 */
+			if ((pvmw->flags & PVMW_SYNC) &&
+			    PageTransCompound(page)) {
+				spinlock_t *ptl = pmd_lock(mm, pvmw->pmd);
+
+				spin_unlock(ptl);
+			}
+			step_forward(pvmw, PMD_SIZE);
+			continue;
 		}
-	} else if (!pmd_present(pmde)) {
+		if (!map_pte(pvmw))
-		return false;
+			goto next_pte;
-	}
+this_pte:
-	if (!map_pte(pvmw))
-		goto next_pte;
-	while (1) {
 		if (check_pte(pvmw))
 			return true;
 next_pte:
-		/* Seek to next pte only makes sense for THP */
-		if (!PageTransHuge(pvmw->page) || PageHuge(pvmw->page))
-			return not_found(pvmw);
 		do {
 			pvmw->address += PAGE_SIZE;
-			if (pvmw->address >= pvmw->vma->vm_end ||
+			if (pvmw->address >= end)
-			    pvmw->address >=
-					__vma_address(pvmw->page, pvmw->vma) +
-					hpage_nr_pages(pvmw->page) * PAGE_SIZE)
 				return not_found(pvmw);
 			/* Did we cross page table boundary? */
-			if (pvmw->address % PMD_SIZE == 0) {
+			if ((pvmw->address & (PMD_SIZE - PAGE_SIZE)) == 0) {
-				pte_unmap(pvmw->pte);
 				if (pvmw->ptl) {
 					spin_unlock(pvmw->ptl);
 					pvmw->ptl = NULL;
 				}
+				pte_unmap(pvmw->pte);
+				pvmw->pte = NULL;
 				goto restart;
-			} else {
+			}
-				pvmw->pte++;
+			pvmw->pte++;
+			if ((pvmw->flags & PVMW_SYNC) && !pvmw->ptl) {
+				pvmw->ptl = pte_lockptr(mm, pvmw->pmd);
+				spin_lock(pvmw->ptl);
 			}
 		} while (pte_none(*pvmw->pte));
 
@@ -242,7 +281,10 @@ next_pte:
 			pvmw->ptl = pte_lockptr(mm, pvmw->pmd);
 			spin_lock(pvmw->ptl);
 		}
-	}
+		goto this_pte;
+	} while (pvmw->address < end);
+
+	return false;
 }
 
 /**
@@ -261,14 +303,10 @@ int page_mapped_in_vma(struct page *page, struct vm_area_struct *vma)
 		.vma = vma,
 		.flags = PVMW_SYNC,
 	};
-	unsigned long start, end;
 
-	start = __vma_address(page, vma);
+	pvmw.address = vma_address(page, vma);
-	end = start + PAGE_SIZE * (hpage_nr_pages(page) - 1);
+	if (pvmw.address == -EFAULT)
-
-	if (unlikely(end < vma->vm_start || start >= vma->vm_end))
 		return 0;
-	pvmw.address = max(start, vma->vm_start);
 	if (!page_vma_mapped_walk(&pvmw))
 		return 0;
 	page_vma_mapped_walk_done(&pvmw);

mm/pgtable-generic.c

@@ -126,8 +126,8 @@ pmd_t pmdp_huge_clear_flush(struct vm_area_struct *vma, unsigned long address,
 {
 	pmd_t pmd;
 	VM_BUG_ON(address & ~HPAGE_PMD_MASK);
-	VM_BUG_ON((pmd_present(*pmdp) && !pmd_trans_huge(*pmdp) &&
+	VM_BUG_ON(pmd_present(*pmdp) && !pmd_trans_huge(*pmdp) &&
-			   !pmd_devmap(*pmdp)) || !pmd_present(*pmdp));
+			   !pmd_devmap(*pmdp));
 	pmd = pmdp_huge_get_and_clear(vma->vm_mm, address, pmdp);
 	flush_pmd_tlb_range(vma, address, address + HPAGE_PMD_SIZE);
 	return pmd;

mm/rmap.c

@@ -687,7 +687,6 @@ static bool should_defer_flush(struct mm_struct *mm, enum ttu_flags flags)
  */
 unsigned long page_address_in_vma(struct page *page, struct vm_area_struct *vma)
 {
-	unsigned long address;
 	if (PageAnon(page)) {
 		struct anon_vma *page__anon_vma = page_anon_vma(page);
 		/*
@@ -697,15 +696,13 @@ unsigned long page_address_in_vma(struct page *page, struct vm_area_struct *vma)
 		if (!vma->anon_vma || !page__anon_vma ||
 		    vma->anon_vma->root != page__anon_vma->root)
 			return -EFAULT;
-	} else if (page->mapping) {
+	} else if (!vma->vm_file) {
-		if (!vma->vm_file || vma->vm_file->f_mapping != page->mapping)
-			return -EFAULT;
-	} else
 		return -EFAULT;
-	address = __vma_address(page, vma);
+	} else if (vma->vm_file->f_mapping != compound_head(page)->mapping) {
-	if (unlikely(address < vma->vm_start || address >= vma->vm_end))
 		return -EFAULT;
-	return address;
+	}
+
+	return vma_address(page, vma);
 }
 
 pmd_t *mm_find_pmd(struct mm_struct *mm, unsigned long address)
@@ -899,7 +896,7 @@ static bool page_mkclean_one(struct page *page, struct vm_area_struct *vma,
 	 */
 	mmu_notifier_range_init(&range, MMU_NOTIFY_PROTECTION_PAGE,
 				0, vma, vma->vm_mm, address,
-				min(vma->vm_end, address + page_size(page)));
+				vma_address_end(page, vma));
 	mmu_notifier_invalidate_range_start(&range);
 
 	while (page_vma_mapped_walk(&pvmw)) {
@@ -1353,6 +1350,15 @@ static bool try_to_unmap_one(struct page *page, struct vm_area_struct *vma,
 	struct mmu_notifier_range range;
 	enum ttu_flags flags = (enum ttu_flags)arg;
 
+	/*
+	 * When racing against e.g. zap_pte_range() on another cpu,
+	 * in between its ptep_get_and_clear_full() and page_remove_rmap(),
+	 * try_to_unmap() may return false when it is about to become true,
+	 * if page table locking is skipped: use TTU_SYNC to wait for that.
+	 */
+	if (flags & TTU_SYNC)
+		pvmw.flags = PVMW_SYNC;
+
 	/* munlock has nothing to gain from examining un-locked vmas */
 	if ((flags & TTU_MUNLOCK) && !(vma->vm_flags & VM_LOCKED))
 		return true;
@@ -1374,9 +1380,10 @@ static bool try_to_unmap_one(struct page *page, struct vm_area_struct *vma,
 	 * Note that the page can not be free in this function as call of
 	 * try_to_unmap() must hold a reference on the page.
 	 */
+	range.end = PageKsm(page) ?
+			address + PAGE_SIZE : vma_address_end(page, vma);
 	mmu_notifier_range_init(&range, MMU_NOTIFY_CLEAR, 0, vma, vma->vm_mm,
-				address,
+				address, range.end);
-				min(vma->vm_end, address + page_size(page)));
 	if (PageHuge(page)) {
 		/*
 		 * If sharing is possible, start and end will be adjusted
@@ -1690,9 +1697,9 @@ static bool invalid_migration_vma(struct vm_area_struct *vma, void *arg)
 	return is_vma_temporary_stack(vma);
 }
 
-static int page_mapcount_is_zero(struct page *page)
+static int page_not_mapped(struct page *page)
 {
-	return !total_mapcount(page);
+	return !page_mapped(page);
 }
 
 /**
@@ -1710,7 +1717,7 @@ bool try_to_unmap(struct page *page, enum ttu_flags flags)
 	struct rmap_walk_control rwc = {
 		.rmap_one = try_to_unmap_one,
 		.arg = (void *)flags,
-		.done = page_mapcount_is_zero,
+		.done = page_not_mapped,
 		.anon_lock = page_lock_anon_vma_read,
 	};
 
@@ -1731,14 +1738,15 @@ bool try_to_unmap(struct page *page, enum ttu_flags flags)
 	else
 		rmap_walk(page, &rwc);
 
-	return !page_mapcount(page) ? true : false;
+	/*
+	 * When racing against e.g. zap_pte_range() on another cpu,
+	 * in between its ptep_get_and_clear_full() and page_remove_rmap(),
+	 * try_to_unmap() may return false when it is about to become true,
+	 * if page table locking is skipped: use TTU_SYNC to wait for that.
+	 */
+	return !page_mapcount(page);
 }
 
-static int page_not_mapped(struct page *page)
-{
-	return !page_mapped(page);
-};
-
 /**
  * try_to_munlock - try to munlock a page
  * @page: the page to be munlocked
@@ -1833,6 +1841,7 @@ static void rmap_walk_anon(struct page *page, struct rmap_walk_control *rwc,
 		struct vm_area_struct *vma = avc->vma;
 		unsigned long address = vma_address(page, vma);
 
+		VM_BUG_ON_VMA(address == -EFAULT, vma);
 		cond_resched();
 
 		if (rwc->invalid_vma && rwc->invalid_vma(vma, rwc->arg))
@@ -1887,6 +1896,7 @@ static void rmap_walk_file(struct page *page, struct rmap_walk_control *rwc,
 			pgoff_start, pgoff_end) {
 		unsigned long address = vma_address(page, vma);
 
+		VM_BUG_ON_VMA(address == -EFAULT, vma);
 		cond_resched();
 
 		if (rwc->invalid_vma && rwc->invalid_vma(vma, rwc->arg))

mm/truncate.c

@@ -173,13 +173,10 @@ void do_invalidatepage(struct page *page, unsigned int offset,
  * its lock, b) when a concurrent invalidate_mapping_pages got there first and
  * c) when tmpfs swizzles a page between a tmpfs inode and swapper_space.
  */
-static void
+static void truncate_cleanup_page(struct page *page)
-truncate_cleanup_page(struct address_space *mapping, struct page *page)
 {
-	if (page_mapped(page)) {
+	if (page_mapped(page))
-		pgoff_t nr = PageTransHuge(page) ? HPAGE_PMD_NR : 1;
+		unmap_mapping_page(page);
-		unmap_mapping_pages(mapping, page->index, nr, false);
-	}
 
 	if (page_has_private(page))
 		do_invalidatepage(page, 0, PAGE_SIZE);
@@ -224,7 +221,7 @@ int truncate_inode_page(struct address_space *mapping, struct page *page)
 	if (page->mapping != mapping)
 		return -EIO;
 
-	truncate_cleanup_page(mapping, page);
+	truncate_cleanup_page(page);
 	delete_from_page_cache(page);
 	return 0;
 }
@@ -362,7 +359,7 @@ void truncate_inode_pages_range(struct address_space *mapping,
 			pagevec_add(&locked_pvec, page);
 		}
 		for (i = 0; i < pagevec_count(&locked_pvec); i++)
-			truncate_cleanup_page(mapping, locked_pvec.pages[i]);
+			truncate_cleanup_page(locked_pvec.pages[i]);
 		delete_from_page_cache_batch(mapping, &locked_pvec);
 		for (i = 0; i < pagevec_count(&locked_pvec); i++)
 			unlock_page(locked_pvec.pages[i]);
@@ -715,6 +712,16 @@ int invalidate_inode_pages2_range(struct address_space *mapping,
 				continue;
 			}
 
+			if (!did_range_unmap && page_mapped(page)) {
+				/*
+				 * If page is mapped, before taking its lock,
+				 * zap the rest of the file in one hit.
+				 */
+				unmap_mapping_pages(mapping, index,
+						(1 + end - index), false);
+				did_range_unmap = 1;
+			}
+
 			lock_page(page);
 			WARN_ON(page_to_index(page) != index);
 			if (page->mapping != mapping) {
@@ -722,23 +729,11 @@ int invalidate_inode_pages2_range(struct address_space *mapping,
 				continue;
 			}
 			wait_on_page_writeback(page);
-			if (page_mapped(page)) {
+
-				if (!did_range_unmap) {
+			if (page_mapped(page))
-					/*
+				unmap_mapping_page(page);
-					 * Zap the rest of the file in one hit.
-					 */
-					unmap_mapping_pages(mapping, index,
-						(1 + end - index), false);
-					did_range_unmap = 1;
-				} else {
-					/*
-					 * Just zap this page
-					 */
-					unmap_mapping_pages(mapping, index,
-								1, false);
-				}
-			}
 			BUG_ON(page_mapped(page));
+
 			ret2 = do_launder_page(mapping, page);
 			if (ret2 == 0) {
 				if (!invalidate_complete_page2(mapping, page))

net/core/ethtool.c

@@ -1509,7 +1509,7 @@ static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
 	if (eeprom.offset + eeprom.len > total_len)
 		return -EINVAL;
 
-	data = kmalloc(PAGE_SIZE, GFP_USER);
+	data = kzalloc(PAGE_SIZE, GFP_USER);
 	if (!data)
 		return -ENOMEM;
 
@@ -1574,7 +1574,7 @@ static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
 	if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
 		return -EINVAL;
 
-	data = kmalloc(PAGE_SIZE, GFP_USER);
+	data = kzalloc(PAGE_SIZE, GFP_USER);
 	if (!data)
 		return -ENOMEM;
 
@@ -1765,7 +1765,7 @@ static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
 		return -EFAULT;
 
 	test.len = test_len;
-	data = kmalloc_array(test_len, sizeof(u64), GFP_USER);
+	data = kcalloc(test_len, sizeof(u64), GFP_USER);
 	if (!data)
 		return -ENOMEM;
 
@@ -2296,7 +2296,7 @@ static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
 	ret = ethtool_tunable_valid(&tuna);
 	if (ret)
 		return ret;
-	data = kmalloc(tuna.len, GFP_USER);
+	data = kzalloc(tuna.len, GFP_USER);
 	if (!data)
 		return -ENOMEM;
 	ret = ops->get_tunable(dev, &tuna, data);
@@ -2482,7 +2482,7 @@ static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
 	ret = ethtool_phy_tunable_valid(&tuna);
 	if (ret)
 		return ret;
-	data = kmalloc(tuna.len, GFP_USER);
+	data = kzalloc(tuna.len, GFP_USER);
 	if (!data)
 		return -ENOMEM;
 	mutex_lock(&phydev->lock);

net/ipv4/devinet.c

@@ -1989,7 +1989,7 @@ static int inet_set_link_af(struct net_device *dev, const struct nlattr *nla)
 		return -EAFNOSUPPORT;
 
 	if (nla_parse_nested_deprecated(tb, IFLA_INET_MAX, nla, NULL, NULL) < 0)
-		BUG();
+		return -EINVAL;
 
 	if (tb[IFLA_INET_CONF]) {
 		nla_for_each_nested(a, tb[IFLA_INET_CONF], rem)

net/ipv4/ping.c

@@ -963,6 +963,7 @@ bool ping_rcv(struct sk_buff *skb)
 	struct sock *sk;
 	struct net *net = dev_net(skb->dev);
 	struct icmphdr *icmph = icmp_hdr(skb);
+	bool rc = false;
 
 	/* We assume the packet has already been checked by icmp_rcv */
 
@@ -977,14 +978,15 @@ bool ping_rcv(struct sk_buff *skb)
 		struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
 
 		pr_debug("rcv on socket %p\n", sk);
-		if (skb2)
+		if (skb2 && !ping_queue_rcv_skb(sk, skb2))
-			ping_queue_rcv_skb(sk, skb2);
+			rc = true;
 		sock_put(sk);
-		return true;
 	}
-	pr_debug("no socket, dropping\n");
 
-	return false;
+	if (!rc)
+		pr_debug("no socket, dropping\n");
+
+	return rc;
 }
 EXPORT_SYMBOL_GPL(ping_rcv);
 

net/ipv6/addrconf.c

@@ -5783,7 +5783,7 @@ static int inet6_set_link_af(struct net_device *dev, const struct nlattr *nla)
 		return -EAFNOSUPPORT;
 
 	if (nla_parse_nested_deprecated(tb, IFLA_INET6_MAX, nla, NULL, NULL) < 0)
-		BUG();
+		return -EINVAL;
 
 	if (tb[IFLA_INET6_TOKEN]) {
 		err = inet6_set_iftoken(idev, nla_data(tb[IFLA_INET6_TOKEN]));

net/mac80211/ieee80211_i.h

@@ -1420,7 +1420,7 @@ ieee80211_get_sband(struct ieee80211_sub_if_data *sdata)
 	rcu_read_lock();
 	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 
-	if (WARN_ON_ONCE(!chanctx_conf)) {
+	if (!chanctx_conf) {
 		rcu_read_unlock();
 		return NULL;
 	}

net/mac80211/rx.c

@@ -2200,17 +2200,15 @@ ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx)
 	sc = le16_to_cpu(hdr->seq_ctrl);
 	frag = sc & IEEE80211_SCTL_FRAG;
 
-	if (is_multicast_ether_addr(hdr->addr1)) {
-		I802_DEBUG_INC(rx->local->dot11MulticastReceivedFrameCount);
-		goto out_no_led;
-	}
-
 	if (rx->sta)
 		cache = &rx->sta->frags;
 
 	if (likely(!ieee80211_has_morefrags(fc) && frag == 0))
 		goto out;
 
+	if (is_multicast_ether_addr(hdr->addr1))
+		return RX_DROP_MONITOR;
+
 	I802_DEBUG_INC(rx->local->rx_handlers_fragments);
 
 	if (skb_linearize(rx->skb))
@@ -2336,7 +2334,6 @@ ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx)
 
  out:
 	ieee80211_led_rx(rx->local);
- out_no_led:
 	if (rx->sta)
 		rx->sta->rx_stats.packets++;
 	return RX_CONTINUE;

net/packet/af_packet.c

@@ -2656,7 +2656,7 @@ static int tpacket_snd(struct packet_sock *po, struct msghdr *msg)
 	}
 	if (likely(saddr == NULL)) {
 		dev	= packet_cached_dev_get(po);
-		proto	= po->num;
+		proto	= READ_ONCE(po->num);
 	} else {
 		err = -EINVAL;
 		if (msg->msg_namelen < sizeof(struct sockaddr_ll))
@@ -2869,7 +2869,7 @@ static int packet_snd(struct socket *sock, struct msghdr *msg, size_t len)
 
 	if (likely(saddr == NULL)) {
 		dev	= packet_cached_dev_get(po);
-		proto	= po->num;
+		proto	= READ_ONCE(po->num);
 	} else {
 		err = -EINVAL;
 		if (msg->msg_namelen < sizeof(struct sockaddr_ll))
@@ -3141,7 +3141,7 @@ static int packet_do_bind(struct sock *sk, const char *name, int ifindex,
 			/* prevents packet_notifier() from calling
 			 * register_prot_hook()
 			 */
-			po->num = 0;
+			WRITE_ONCE(po->num, 0);
 			__unregister_prot_hook(sk, true);
 			rcu_read_lock();
 			dev_curr = po->prot_hook.dev;
@@ -3151,17 +3151,17 @@ static int packet_do_bind(struct sock *sk, const char *name, int ifindex,
 		}
 
 		BUG_ON(po->running);
-		po->num = proto;
+		WRITE_ONCE(po->num, proto);
 		po->prot_hook.type = proto;
 
 		if (unlikely(unlisted)) {
 			dev_put(dev);
 			po->prot_hook.dev = NULL;
-			po->ifindex = -1;
+			WRITE_ONCE(po->ifindex, -1);
 			packet_cached_dev_reset(po);
 		} else {
 			po->prot_hook.dev = dev;
-			po->ifindex = dev ? dev->ifindex : 0;
+			WRITE_ONCE(po->ifindex, dev ? dev->ifindex : 0);
 			packet_cached_dev_assign(po, dev);
 		}
 	}
@@ -3475,7 +3475,7 @@ static int packet_getname_spkt(struct socket *sock, struct sockaddr *uaddr,
 	uaddr->sa_family = AF_PACKET;
 	memset(uaddr->sa_data, 0, sizeof(uaddr->sa_data));
 	rcu_read_lock();
-	dev = dev_get_by_index_rcu(sock_net(sk), pkt_sk(sk)->ifindex);
+	dev = dev_get_by_index_rcu(sock_net(sk), READ_ONCE(pkt_sk(sk)->ifindex));
 	if (dev)
 		strlcpy(uaddr->sa_data, dev->name, sizeof(uaddr->sa_data));
 	rcu_read_unlock();
@@ -3490,16 +3490,18 @@ static int packet_getname(struct socket *sock, struct sockaddr *uaddr,
 	struct sock *sk = sock->sk;
 	struct packet_sock *po = pkt_sk(sk);
 	DECLARE_SOCKADDR(struct sockaddr_ll *, sll, uaddr);
+	int ifindex;
 
 	if (peer)
 		return -EOPNOTSUPP;
 
+	ifindex = READ_ONCE(po->ifindex);
 	sll->sll_family = AF_PACKET;
-	sll->sll_ifindex = po->ifindex;
+	sll->sll_ifindex = ifindex;
-	sll->sll_protocol = po->num;
+	sll->sll_protocol = READ_ONCE(po->num);
 	sll->sll_pkttype = 0;
 	rcu_read_lock();
-	dev = dev_get_by_index_rcu(sock_net(sk), po->ifindex);
+	dev = dev_get_by_index_rcu(sock_net(sk), ifindex);
 	if (dev) {
 		sll->sll_hatype = dev->type;
 		sll->sll_halen = dev->addr_len;
@@ -4099,7 +4101,7 @@ static int packet_notifier(struct notifier_block *this,
 				}
 				if (msg == NETDEV_UNREGISTER) {
 					packet_cached_dev_reset(po);
-					po->ifindex = -1;
+					WRITE_ONCE(po->ifindex, -1);
 					if (po->prot_hook.dev)
 						dev_put(po->prot_hook.dev);
 					po->prot_hook.dev = NULL;
@@ -4405,7 +4407,7 @@ static int packet_set_ring(struct sock *sk, union tpacket_req_u *req_u,
 	was_running = po->running;
 	num = po->num;
 	if (was_running) {
-		po->num = 0;
+		WRITE_ONCE(po->num, 0);
 		__unregister_prot_hook(sk, false);
 	}
 	spin_unlock(&po->bind_lock);
@@ -4440,7 +4442,7 @@ static int packet_set_ring(struct sock *sk, union tpacket_req_u *req_u,
 
 	spin_lock(&po->bind_lock);
 	if (was_running) {
-		po->num = num;
+		WRITE_ONCE(po->num, num);
 		register_prot_hook(sk);
 	}
 	spin_unlock(&po->bind_lock);
@@ -4613,8 +4615,8 @@ static int packet_seq_show(struct seq_file *seq, void *v)
 			   s,
 			   refcount_read(&s->sk_refcnt),
 			   s->sk_type,
-			   ntohs(po->num),
+			   ntohs(READ_ONCE(po->num)),
-			   po->ifindex,
+			   READ_ONCE(po->ifindex),
 			   po->running,
 			   atomic_read(&s->sk_rmem_alloc),
 			   from_kuid_munged(seq_user_ns(seq), sock_i_uid(s)),

net/wireless/util.c

@@ -1026,6 +1026,9 @@ int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
 		case NL80211_IFTYPE_MESH_POINT:
 			/* mesh should be handled? */
 			break;
+		case NL80211_IFTYPE_OCB:
+			cfg80211_leave_ocb(rdev, dev);
+			break;
 		default:
 			break;
 		}

scripts/recordmcount.h

@@ -192,15 +192,20 @@ static unsigned int get_symindex(Elf_Sym const *sym, Elf32_Word const *symtab,
 				 Elf32_Word const *symtab_shndx)
 {
 	unsigned long offset;
+	unsigned short shndx = w2(sym->st_shndx);
 	int index;
 
-	if (sym->st_shndx != SHN_XINDEX)
+	if (shndx > SHN_UNDEF && shndx < SHN_LORESERVE)
-		return w2(sym->st_shndx);
+		return shndx;
 
-	offset = (unsigned long)sym - (unsigned long)symtab;
+	if (shndx == SHN_XINDEX) {
-	index = offset / sizeof(*sym);
+		offset = (unsigned long)sym - (unsigned long)symtab;
+		index = offset / sizeof(*sym);
 
-	return w(symtab_shndx[index]);
+		return w(symtab_shndx[index]);
+	}
+
+	return 0;
 }
 
 static unsigned int get_shnum(Elf_Ehdr const *ehdr, Elf_Shdr const *shdr0)

security/integrity/Makefile

@@ -11,7 +11,8 @@ integrity-$(CONFIG_INTEGRITY_SIGNATURE) += digsig.o
 integrity-$(CONFIG_INTEGRITY_ASYMMETRIC_KEYS) += digsig_asymmetric.o
 integrity-$(CONFIG_INTEGRITY_PLATFORM_KEYRING) += platform_certs/platform_keyring.o
 integrity-$(CONFIG_LOAD_UEFI_KEYS) += platform_certs/efi_parser.o \
-					platform_certs/load_uefi.o
+				      platform_certs/load_uefi.o \
+				      platform_certs/keyring_handler.o
 integrity-$(CONFIG_LOAD_IPL_KEYS) += platform_certs/load_ipl_s390.o
 
 obj-$(CONFIG_IMA)			+= ima/

security/integrity/platform_certs/keyring_handler.c

@@ -0,0 +1,91 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/cred.h>
+#include <linux/err.h>
+#include <linux/efi.h>
+#include <linux/slab.h>
+#include <keys/asymmetric-type.h>
+#include <keys/system_keyring.h>
+#include "../integrity.h"
+
+static efi_guid_t efi_cert_x509_guid __initdata = EFI_CERT_X509_GUID;
+static efi_guid_t efi_cert_x509_sha256_guid __initdata =
+	EFI_CERT_X509_SHA256_GUID;
+static efi_guid_t efi_cert_sha256_guid __initdata = EFI_CERT_SHA256_GUID;
+
+/*
+ * Blacklist a hash.
+ */
+static __init void uefi_blacklist_hash(const char *source, const void *data,
+				       size_t len, const char *type,
+				       size_t type_len)
+{
+	char *hash, *p;
+
+	hash = kmalloc(type_len + len * 2 + 1, GFP_KERNEL);
+	if (!hash)
+		return;
+	p = memcpy(hash, type, type_len);
+	p += type_len;
+	bin2hex(p, data, len);
+	p += len * 2;
+	*p = 0;
+
+	mark_hash_blacklisted(hash);
+	kfree(hash);
+}
+
+/*
+ * Blacklist an X509 TBS hash.
+ */
+static __init void uefi_blacklist_x509_tbs(const char *source,
+					   const void *data, size_t len)
+{
+	uefi_blacklist_hash(source, data, len, "tbs:", 4);
+}
+
+/*
+ * Blacklist the hash of an executable.
+ */
+static __init void uefi_blacklist_binary(const char *source,
+					 const void *data, size_t len)
+{
+	uefi_blacklist_hash(source, data, len, "bin:", 4);
+}
+
+/*
+ * Add an X509 cert to the revocation list.
+ */
+static __init void uefi_revocation_list_x509(const char *source,
+					     const void *data, size_t len)
+{
+	add_key_to_revocation_list(data, len);
+}
+
+/*
+ * Return the appropriate handler for particular signature list types found in
+ * the UEFI db and MokListRT tables.
+ */
+__init efi_element_handler_t get_handler_for_db(const efi_guid_t *sig_type)
+{
+	if (efi_guidcmp(*sig_type, efi_cert_x509_guid) == 0)
+		return add_to_platform_keyring;
+	return 0;
+}
+
+/*
+ * Return the appropriate handler for particular signature list types found in
+ * the UEFI dbx and MokListXRT tables.
+ */
+__init efi_element_handler_t get_handler_for_dbx(const efi_guid_t *sig_type)
+{
+	if (efi_guidcmp(*sig_type, efi_cert_x509_sha256_guid) == 0)
+		return uefi_blacklist_x509_tbs;
+	if (efi_guidcmp(*sig_type, efi_cert_sha256_guid) == 0)
+		return uefi_blacklist_binary;
+	if (efi_guidcmp(*sig_type, efi_cert_x509_guid) == 0)
+		return uefi_revocation_list_x509;
+	return 0;
+}

security/integrity/platform_certs/keyring_handler.h

@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef PLATFORM_CERTS_INTERNAL_H
+#define PLATFORM_CERTS_INTERNAL_H
+
+#include <linux/efi.h>
+
+void blacklist_hash(const char *source, const void *data,
+		    size_t len, const char *type,
+		    size_t type_len);
+
+/*
+ * Blacklist an X509 TBS hash.
+ */
+void blacklist_x509_tbs(const char *source, const void *data, size_t len);
+
+/*
+ * Blacklist the hash of an executable.
+ */
+void blacklist_binary(const char *source, const void *data, size_t len);
+
+/*
+ * Return the handler for particular signature list types found in the db.
+ */
+efi_element_handler_t get_handler_for_db(const efi_guid_t *sig_type);
+
+/*
+ * Return the handler for particular signature list types found in the dbx.
+ */
+efi_element_handler_t get_handler_for_dbx(const efi_guid_t *sig_type);
+
+#endif

security/integrity/platform_certs/load_uefi.c

@@ -9,6 +9,7 @@
 #include <keys/asymmetric-type.h>
 #include <keys/system_keyring.h>
 #include "../integrity.h"
+#include "keyring_handler.h"
 
 static efi_guid_t efi_cert_x509_guid __initdata = EFI_CERT_X509_GUID;
 static efi_guid_t efi_cert_x509_sha256_guid __initdata =
@@ -69,72 +70,6 @@ static __init void *get_cert_list(efi_char16_t *name, efi_guid_t *guid,
 	return db;
 }
 
-/*
- * Blacklist a hash.
- */
-static __init void uefi_blacklist_hash(const char *source, const void *data,
-				       size_t len, const char *type,
-				       size_t type_len)
-{
-	char *hash, *p;
-
-	hash = kmalloc(type_len + len * 2 + 1, GFP_KERNEL);
-	if (!hash)
-		return;
-	p = memcpy(hash, type, type_len);
-	p += type_len;
-	bin2hex(p, data, len);
-	p += len * 2;
-	*p = 0;
-
-	mark_hash_blacklisted(hash);
-	kfree(hash);
-}
-
-/*
- * Blacklist an X509 TBS hash.
- */
-static __init void uefi_blacklist_x509_tbs(const char *source,
-					   const void *data, size_t len)
-{
-	uefi_blacklist_hash(source, data, len, "tbs:", 4);
-}
-
-/*
- * Blacklist the hash of an executable.
- */
-static __init void uefi_blacklist_binary(const char *source,
-					 const void *data, size_t len)
-{
-	uefi_blacklist_hash(source, data, len, "bin:", 4);
-}
-
-/*
- * Return the appropriate handler for particular signature list types found in
- * the UEFI db and MokListRT tables.
- */
-static __init efi_element_handler_t get_handler_for_db(const efi_guid_t *
-						       sig_type)
-{
-	if (efi_guidcmp(*sig_type, efi_cert_x509_guid) == 0)
-		return add_to_platform_keyring;
-	return 0;
-}
-
-/*
- * Return the appropriate handler for particular signature list types found in
- * the UEFI dbx and MokListXRT tables.
- */
-static __init efi_element_handler_t get_handler_for_dbx(const efi_guid_t *
-							sig_type)
-{
-	if (efi_guidcmp(*sig_type, efi_cert_x509_sha256_guid) == 0)
-		return uefi_blacklist_x509_tbs;
-	if (efi_guidcmp(*sig_type, efi_cert_sha256_guid) == 0)
-		return uefi_blacklist_binary;
-	return 0;
-}
-
 /*
  * Load the certs contained in the UEFI databases into the platform trusted
  * keyring and the UEFI blacklisted X.509 cert SHA256 hashes into the blacklist

tools/testing/selftests/kvm/lib/kvm_util.c

@@ -54,7 +54,7 @@ int kvm_check_cap(long cap)
 		exit(KSFT_SKIP);
 
 	ret = ioctl(kvm_fd, KVM_CHECK_EXTENSION, cap);
-	TEST_ASSERT(ret != -1, "KVM_CHECK_EXTENSION IOCTL failed,\n"
+	TEST_ASSERT(ret >= 0, "KVM_CHECK_EXTENSION IOCTL failed,\n"
 		"  rc: %i errno: %i", ret, errno);
 
 	close(kvm_fd);

virt/kvm/kvm_main.c

@@ -1593,6 +1593,13 @@ static bool vma_is_valid(struct vm_area_struct *vma, bool write_fault)
 	return true;
 }
 
+static int kvm_try_get_pfn(kvm_pfn_t pfn)
+{
+	if (kvm_is_reserved_pfn(pfn))
+		return 1;
+	return get_page_unless_zero(pfn_to_page(pfn));
+}
+
 static int hva_to_pfn_remapped(struct vm_area_struct *vma,
 			       unsigned long addr, bool *async,
 			       bool write_fault, bool *writable,
@@ -1642,13 +1649,21 @@ static int hva_to_pfn_remapped(struct vm_area_struct *vma,
 	 * Whoever called remap_pfn_range is also going to call e.g.
 	 * unmap_mapping_range before the underlying pages are freed,
 	 * causing a call to our MMU notifier.
+	 *
+	 * Certain IO or PFNMAP mappings can be backed with valid
+	 * struct pages, but be allocated without refcounting e.g.,
+	 * tail pages of non-compound higher order allocations, which
+	 * would then underflow the refcount when the caller does the
+	 * required put_page. Don't allow those pages here.
 	 */ 
-	kvm_get_pfn(pfn);
+	if (!kvm_try_get_pfn(pfn))
+		r = -EFAULT;
 
 out:
 	pte_unmap_unlock(ptep, ptl);
 	*p_pfn = pfn;
-	return 0;
+
+	return r;
 }
 
 /*