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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
This commit is contained in:
Greg Kroah-Hartman 2021-06-30 19:19:07 +02:00
commit 904c2c6cd7
72 changed files with 957 additions and 467 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Makefile
View File

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

16
arch/arm/kernel/setup.c
View File

@ -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
}

10
arch/arm64/Makefile
View File

@ -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)

10
arch/mips/generic/board-boston.its.S
View File

@ -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";
fdt = "fdt@boston";
kernel = "kernel";
fdt = "fdt-boston";
};
};
};

10
arch/mips/generic/board-ni169445.its.S
View File

@ -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";
fdt = "fdt@ni169445";
kernel = "kernel";
fdt = "fdt-ni169445";
};
};
};

20
arch/mips/generic/board-ocelot.its.S
View File

@ -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";
fdt = "fdt@ocelot_pcb123";
kernel = "kernel";
fdt = "fdt-ocelot_pcb123";
};
conf@ocelot_pcb120 {
conf-ocelot_pcb120 {
description = "Ocelot Linux kernel";
kernel = "kernel@0";
fdt = "fdt@ocelot_pcb120";
kernel = "kernel";
fdt = "fdt-ocelot_pcb120";
};
};
};

10
arch/mips/generic/board-xilfpga.its.S
View File

@ -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";
fdt = "fdt@xilfpga";
kernel = "kernel";
fdt = "fdt-xilfpga";
};
};
};

10
arch/mips/generic/vmlinux.its.S
View File

@ -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";
};
};
};

44
arch/x86/pci/fixup.c
View File

@ -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

9
certs/Kconfig
View File

@ -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

2
certs/Makefile
View File

@ -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

52
certs/blacklist.c
View File

@ -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
*/

2
certs/blacklist.h
View File

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

57
certs/common.c Normal file
View File

@ -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;
}

9
certs/common.h Normal file
View File

@ -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

55
certs/system_keyring.c
View File

@ -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;
end = p + system_certificate_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(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;
return load_certificate_list(system_certificate_list, system_certificate_list_size,
builtin_trusted_keys);
}
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) {

23
drivers/dma/mediatek/mtk-uart-apdma.c
View File

@ -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;
struct mtk_chan *c = to_mtk_uart_apdma_chan(chan);
kfree(c->desc);
kfree(container_of(vd, struct mtk_uart_apdma_desc, vd));
}
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);
}
static void mtk_uart_apdma_chan_complete_handler(struct mtk_chan *c)
{
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);

2
drivers/dma/sh/rcar-dmac.c
View File

@ -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;

2
drivers/dma/xilinx/zynqmp_dma.c
View File

@ -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;

6
drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
View File

@ -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,

6
drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
View File

@ -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,

17
drivers/gpu/drm/nouveau/nouveau_prime.c
View File

@ -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)

14
drivers/gpu/drm/radeon/radeon_prime.c
View File

@ -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))
bo->prime_shared_count++;
if (unlikely(ret))
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;
}

4
drivers/i2c/busses/i2c-robotfuzz-osif.c
View File

@ -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");

50
drivers/mmc/host/meson-gx-mmc.c
View File

@ -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,
host->bounce_buf, xfer_bytes);
meson_mmc_copy_buffer(host, data, xfer_bytes, true);
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,
host->bounce_buf, xfer_bytes);
meson_mmc_copy_buffer(host, data, xfer_bytes, false);
}
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 */

1
drivers/net/caif/caif_serial.c
View File

@ -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;

4
drivers/net/ethernet/qlogic/qed/qed_dcbx.c
View File

@ -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));

2
drivers/net/ethernet/realtek/r8169_main.c
View File

@ -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;
}
}

2
drivers/net/ethernet/renesas/sh_eth.c
View File

@ -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;
}

19
drivers/net/ethernet/xilinx/ll_temac_main.c
View File

@ -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;
}

6
drivers/net/phy/dp83867.c
View File

@ -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);
}

2
drivers/net/usb/r8152.c
View File

@ -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;
}
}

5
drivers/net/wireless/mac80211_hwsim.c
View File

@ -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__);
}

16
drivers/pci/pci.c
View File

@ -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);
return 0; /* already enabled */
/*
* Power state could be unknown at this point, either due to a fresh
* 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);

9
drivers/pinctrl/stm32/pinctrl-stm32.c
View File

@ -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;

11
drivers/spi/spi-nxp-fspi.c
View File

@ -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)

1
fs/nilfs2/sysfs.c
View File

@ -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);
}

21
include/keys/system_keyring.h
View File

@ -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

8
include/linux/huge_mm.h
View File

@ -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;

16
include/linux/hugetlb.h
View File

@ -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;

3
include/linux/mm.h
View File

@ -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,

13
include/linux/mmdebug.h
View File

@ -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

13
include/linux/pagemap.h
View File

@ -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.
* (TODO: hugepage should have ->index in PAGE_SIZE)
* Get the offset in PAGE_SIZE (even for hugetlb pages).
* (TODO: hugetlb pages should have ->index in PAGE_SIZE)
*/
static inline pgoff_t page_to_pgoff(struct page *page)
{
if (unlikely(PageHeadHuge(page)))
return page->index << compound_order(page);
if (unlikely(PageHuge(page)))
return hugetlb_basepage_index(page);
return page_to_index(page);
}

1
include/linux/rmap.h
View File

@ -99,6 +99,7 @@ enum ttu_flags {
TTU_RMAP_LOCKED = 0x80, /* do not grab rmap lock:
* caller holds it */
TTU_SPLIT_FREEZE = 0x100, /* freeze pte under splitting thp */
TTU_SYNC = 0x200, /* avoid racy checks with PVMW_SYNC */
};
#ifdef CONFIG_MMU

10
include/net/sock.h
View File

@ -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;
}
}

2
kernel/futex.c
View File

@ -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();
}

53
kernel/kthread.c
View File

@ -1040,20 +1040,15 @@ 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
* that it won't get queued later via the delayed work's timer.
* Make sure that the timer is neither set nor running and could
* not manipulate the work list_head any longer.
*
* The work might still be in use when this function finishes. See the
* current_work proceed by the worker.
*
* Return: %true if @work was pending and successfully canceled,
* %false if @work was not pending
* The function is called under worker->lock. The lock is temporary
* released but the timer can't be set again in the meantime.
*/
static bool __kthread_cancel_work(struct kthread_work *work, bool is_dwork,
static void kthread_cancel_delayed_work_timer(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;
@ -1069,8 +1064,23 @@ static bool __kthread_cancel_work(struct kthread_work *work, bool is_dwork,
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.
*
* Return: %true if @work was pending and successfully canceled,
* %false if @work was not pending
*/
static bool __kthread_cancel_work(struct kthread_work *work)
{
/*
* 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;

14
kernel/module.c
View File

@ -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);

48
mm/huge_memory.c
View File

@ -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 (!PageDirty(page) && pmd_dirty(_pmd))
if (unlikely(is_pmd_migration_entry(old_pmd))) {
swp_entry_t entry;
entry = pmd_to_swp_entry(old_pmd);
page = migration_entry_to_page(entry);
} else {
page = pmd_page(old_pmd);
if (!PageDirty(page) && pmd_dirty(old_pmd))
set_page_dirty(page);
if (!PageReferenced(page) && pmd_young(_pmd))
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;
bool unmap_success;
TTU_RMAP_LOCKED | TTU_SPLIT_HUGE_PMD | TTU_SYNC;
VM_BUG_ON_PAGE(!PageHead(page), page);
if (PageAnon(page))
ttu_flags |= TTU_SPLIT_FREEZE;
unmap_success = try_to_unmap(page, ttu_flags);
VM_BUG_ON_PAGE(!unmap_success, page);
try_to_unmap(page, ttu_flags);
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);
mapcount = total_mapcount(head);
if (!mapcount && page_ref_freeze(head, 1 + extra_pins)) {
if (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);

5
mm/hugetlb.c
View File

@ -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

53
mm/internal.h
View File

@ -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);
end = start + PAGE_SIZE * (hpage_nr_pages(page) - 1);
VM_BUG_ON_PAGE(PageKsm(page), page); /* KSM page->index unusable */
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,

41
mm/memory.c
View File

@ -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.

1
mm/migrate.c
View File

@ -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

118
mm/page_vma_mapped.c
View File

@ -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 (unlikely(PageHuge(page))) {
/* The only possible mapping was handled on last iteration */
if (pvmw->pte)
goto next_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)
@ -163,16 +172,36 @@ bool page_vma_mapped_walk(struct page_vma_mapped_walk *pvmw)
return not_found(pvmw);
return true;
}
/*
* Seek to next pte only makes sense for THP.
* 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))
return false;
if (!pgd_present(*pgd)) {
step_forward(pvmw, PGDIR_SIZE);
continue;
}
p4d = p4d_offset(pgd, pvmw->address);
if (!p4d_present(*p4d))
return false;
if (!p4d_present(*p4d)) {
step_forward(pvmw, P4D_SIZE);
continue;
}
pud = pud_offset(p4d, pvmw->address);
if (!pud_present(*pud))
return false;
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
@ -180,61 +209,71 @@ restart:
* 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))) {
pmde = *pvmw->pmd;
if (likely(pmd_trans_huge(pmde))) {
if (pvmw->flags & PVMW_MIGRATION)
return not_found(pvmw);
if (pmd_page(*pvmw->pmd) != page)
if (pmd_page(pmde) != 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 (!pmd_present(pmde)) {
swp_entry_t entry;
if (migration_entry_to_page(entry) != page)
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)) {
return false;
/*
* 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;
}
if (!map_pte(pvmw))
goto next_pte;
while (1) {
this_pte:
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 ||
pvmw->address >=
__vma_address(pvmw->page, pvmw->vma) +
hpage_nr_pages(pvmw->page) * PAGE_SIZE)
if (pvmw->address >= end)
return not_found(pvmw);
/* Did we cross page table boundary? */
if (pvmw->address % PMD_SIZE == 0) {
pte_unmap(pvmw->pte);
if ((pvmw->address & (PMD_SIZE - PAGE_SIZE)) == 0) {
if (pvmw->ptl) {
spin_unlock(pvmw->ptl);
pvmw->ptl = NULL;
}
pte_unmap(pvmw->pte);
pvmw->pte = NULL;
goto restart;
} else {
}
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);
end = start + PAGE_SIZE * (hpage_nr_pages(page) - 1);
if (unlikely(end < vma->vm_start || start >= vma->vm_end))
pvmw.address = vma_address(page, vma);
if (pvmw.address == -EFAULT)
return 0;
pvmw.address = max(start, vma->vm_start);
if (!page_vma_mapped_walk(&pvmw))
return 0;
page_vma_mapped_walk_done(&pvmw);

4
mm/pgtable-generic.c
View File

@ -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) &&
!pmd_devmap(*pmdp)) || !pmd_present(*pmdp));
VM_BUG_ON(pmd_present(*pmdp) && !pmd_trans_huge(*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;

50
mm/rmap.c
View File

@ -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) {
if (!vma->vm_file || vma->vm_file->f_mapping != page->mapping)
} else if (!vma->vm_file) {
return -EFAULT;
} else
} else if (vma->vm_file->f_mapping != compound_head(page)->mapping) {
return -EFAULT;
address = __vma_address(page, vma);
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,
min(vma->vm_end, address + page_size(page)));
address, range.end);
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))

43
mm/truncate.c
View File

@ -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
truncate_cleanup_page(struct address_space *mapping, struct page *page)
static void truncate_cleanup_page(struct page *page)
{
if (page_mapped(page)) {
pgoff_t nr = PageTransHuge(page) ? HPAGE_PMD_NR : 1;
unmap_mapping_pages(mapping, page->index, nr, false);
}
if (page_mapped(page))
unmap_mapping_page(page);
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) {
/*
* 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);
}
}
if (page_mapped(page))
unmap_mapping_page(page);
BUG_ON(page_mapped(page));
ret2 = do_launder_page(mapping, page);
if (ret2 == 0) {
if (!invalidate_complete_page2(mapping, page))

10
net/core/ethtool.c
View File

@ -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);

2
net/ipv4/devinet.c
View File

@ -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)

10
net/ipv4/ping.c
View File

@ -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)
ping_queue_rcv_skb(sk, skb2);
if (skb2 && !ping_queue_rcv_skb(sk, skb2))
rc = true;
sock_put(sk);
return true;
}
if (!rc)
pr_debug("no socket, dropping\n");
return false;
return rc;
}
EXPORT_SYMBOL_GPL(ping_rcv);

2
net/ipv6/addrconf.c
View File

@ -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]));

2
net/mac80211/ieee80211_i.h
View File

@ -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;
}

9
net/mac80211/rx.c
View File

@ -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;

32
net/packet/af_packet.c
View File

@ -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_protocol = po->num;
sll->sll_ifindex = ifindex;
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),
po->ifindex,
ntohs(READ_ONCE(po->num)),
READ_ONCE(po->ifindex),
po->running,
atomic_read(&s->sk_rmem_alloc),
from_kuid_munged(seq_user_ns(seq), sock_i_uid(s)),

3
net/wireless/util.c
View File

@ -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;
}

9
scripts/recordmcount.h
View File

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

3
security/integrity/Makefile
View File

@ -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/

91
security/integrity/platform_certs/keyring_handler.c Normal file
View File

@ -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;
}

32
security/integrity/platform_certs/keyring_handler.h Normal file
View File

@ -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

67
security/integrity/platform_certs/load_uefi.c
View File

@ -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

2
tools/testing/selftests/kvm/lib/kvm_util.c
View File

@ -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);

19
virt/kvm/kvm_main.c
View File

@ -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;
}
/*