Junxiao Bi via Ocfs2-devel 82bf8e7271 ocfs2: dlmfs: fix error handling of user_dlm_destroy_lock ... commit 863e0d81b6683c4cbc588ad831f560c90e494bef upstream. When user_dlm_destroy_lock failed, it didn't clean up the flags it set before exit. For USER_LOCK_IN_TEARDOWN, if this function fails because of lock is still in used, next time when unlink invokes this function, it will return succeed, and then unlink will remove inode and dentry if lock is not in used(file closed), but the dlm lock is still linked in dlm lock resource, then when bast come in, it will trigger a panic due to user-after-free. See the following panic call trace. To fix this, USER_LOCK_IN_TEARDOWN should be reverted if fail. And also error should be returned if USER_LOCK_IN_TEARDOWN is set to let user know that unlink fail. For the case of ocfs2_dlm_unlock failure, besides USER_LOCK_IN_TEARDOWN, USER_LOCK_BUSY is also required to be cleared. Even though spin lock is released in between, but USER_LOCK_IN_TEARDOWN is still set, for USER_LOCK_BUSY, if before every place that waits on this flag, USER_LOCK_IN_TEARDOWN is checked to bail out, that will make sure no flow waits on the busy flag set by user_dlm_destroy_lock(), then we can simplely revert USER_LOCK_BUSY when ocfs2_dlm_unlock fails. Fix user_dlm_cluster_lock() which is the only function not following this. [ 941.336392] (python,26174,16):dlmfs_unlink:562 ERROR: unlink 004fb0000060000b5a90b8c847b72e1, error -16 from destroy [ 989.757536] ------------[ cut here ]------------ [ 989.757709] kernel BUG at fs/ocfs2/dlmfs/userdlm.c:173! [ 989.757876] invalid opcode: 0000 [#1] SMP [ 989.758027] Modules linked in: ksplice_2zhuk2jr_ib_ipoib_new(O) ksplice_2zhuk2jr(O) mptctl mptbase xen_netback xen_blkback xen_gntalloc xen_gntdev xen_evtchn cdc_ether usbnet mii ocfs2 jbd2 rpcsec_gss_krb5 auth_rpcgss nfsv4 nfsv3 nfs_acl nfs fscache lockd grace ocfs2_dlmfs ocfs2_stack_o2cb ocfs2_dlm ocfs2_nodemanager ocfs2_stackglue configfs bnx2fc fcoe libfcoe libfc scsi_transport_fc sunrpc ipmi_devintf bridge stp llc rds_rdma rds bonding ib_sdp ib_ipoib rdma_ucm ib_ucm ib_uverbs ib_umad rdma_cm ib_cm iw_cm falcon_lsm_serviceable(PE) falcon_nf_netcontain(PE) mlx4_vnic falcon_kal(E) falcon_lsm_pinned_13402(E) mlx4_ib ib_sa ib_mad ib_core ib_addr xenfs xen_privcmd dm_multipath iTCO_wdt iTCO_vendor_support pcspkr sb_edac edac_core i2c_i801 lpc_ich mfd_core ipmi_ssif i2c_core ipmi_si ipmi_msghandler [ 989.760686] ioatdma sg ext3 jbd mbcache sd_mod ahci libahci ixgbe dca ptp pps_core vxlan udp_tunnel ip6_udp_tunnel megaraid_sas mlx4_core crc32c_intel be2iscsi bnx2i cnic uio cxgb4i cxgb4 cxgb3i libcxgbi ipv6 cxgb3 mdio libiscsi_tcp qla4xxx iscsi_boot_sysfs libiscsi scsi_transport_iscsi wmi dm_mirror dm_region_hash dm_log dm_mod [last unloaded: ksplice_2zhuk2jr_ib_ipoib_old] [ 989.761987] CPU: 10 PID: 19102 Comm: dlm_thread Tainted: P OE 4.1.12-124.57.1.el6uek.x86_64 #2 [ 989.762290] Hardware name: Oracle Corporation ORACLE SERVER X5-2/ASM,MOTHERBOARD,1U, BIOS 30350100 06/17/2021 [ 989.762599] task: ffff880178af6200 ti: ffff88017f7c8000 task.ti: ffff88017f7c8000 [ 989.762848] RIP: e030:[<ffffffffc07d4316>] [<ffffffffc07d4316>] __user_dlm_queue_lockres.part.4+0x76/0x80 [ocfs2_dlmfs] [ 989.763185] RSP: e02b:ffff88017f7cbcb8 EFLAGS: 00010246 [ 989.763353] RAX: 0000000000000000 RBX: ffff880174d48008 RCX: 0000000000000003 [ 989.763565] RDX: 0000000000120012 RSI: 0000000000000003 RDI: ffff880174d48170 [ 989.763778] RBP: ffff88017f7cbcc8 R08: ffff88021f4293b0 R09: 0000000000000000 [ 989.763991] R10: ffff880179c8c000 R11: 0000000000000003 R12: ffff880174d48008 [ 989.764204] R13: 0000000000000003 R14: ffff880179c8c000 R15: ffff88021db7a000 [ 989.764422] FS: 0000000000000000(0000) GS:ffff880247480000(0000) knlGS:ffff880247480000 [ 989.764685] CS: e033 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 989.764865] CR2: ffff8000007f6800 CR3: 0000000001ae0000 CR4: 0000000000042660 [ 989.765081] Stack: [ 989.765167] 0000000000000003 ffff880174d48040 ffff88017f7cbd18 ffffffffc07d455f [ 989.765442] ffff88017f7cbd88 ffffffff816fb639 ffff88017f7cbd38 ffff8800361b5600 [ 989.765717] ffff88021db7a000 ffff88021f429380 0000000000000003 ffffffffc0453020 [ 989.765991] Call Trace: [ 989.766093] [<ffffffffc07d455f>] user_bast+0x5f/0xf0 [ocfs2_dlmfs] [ 989.766287] [<ffffffff816fb639>] ? schedule_timeout+0x169/0x2d0 [ 989.766475] [<ffffffffc0453020>] ? o2dlm_lock_ast_wrapper+0x20/0x20 [ocfs2_stack_o2cb] [ 989.766738] [<ffffffffc045303a>] o2dlm_blocking_ast_wrapper+0x1a/0x20 [ocfs2_stack_o2cb] [ 989.767010] [<ffffffffc0864ec6>] dlm_do_local_bast+0x46/0xe0 [ocfs2_dlm] [ 989.767217] [<ffffffffc084f5cc>] ? dlm_lockres_calc_usage+0x4c/0x60 [ocfs2_dlm] [ 989.767466] [<ffffffffc08501f1>] dlm_thread+0xa31/0x1140 [ocfs2_dlm] [ 989.767662] [<ffffffff816f78da>] ? __schedule+0x24a/0x810 [ 989.767834] [<ffffffff816f78ce>] ? __schedule+0x23e/0x810 [ 989.768006] [<ffffffff816f78da>] ? __schedule+0x24a/0x810 [ 989.768178] [<ffffffff816f78ce>] ? __schedule+0x23e/0x810 [ 989.768349] [<ffffffff816f78da>] ? __schedule+0x24a/0x810 [ 989.768521] [<ffffffff816f78ce>] ? __schedule+0x23e/0x810 [ 989.768693] [<ffffffff816f78da>] ? __schedule+0x24a/0x810 [ 989.768893] [<ffffffff816f78ce>] ? __schedule+0x23e/0x810 [ 989.769067] [<ffffffff816f78da>] ? __schedule+0x24a/0x810 [ 989.769241] [<ffffffff810ce4d0>] ? wait_woken+0x90/0x90 [ 989.769411] [<ffffffffc084f7c0>] ? dlm_kick_thread+0x80/0x80 [ocfs2_dlm] [ 989.769617] [<ffffffff810a8bbb>] kthread+0xcb/0xf0 [ 989.769774] [<ffffffff816f78da>] ? __schedule+0x24a/0x810 [ 989.769945] [<ffffffff816f78da>] ? __schedule+0x24a/0x810 [ 989.770117] [<ffffffff810a8af0>] ? kthread_create_on_node+0x180/0x180 [ 989.770321] [<ffffffff816fdaa1>] ret_from_fork+0x61/0x90 [ 989.770492] [<ffffffff810a8af0>] ? kthread_create_on_node+0x180/0x180 [ 989.770689] Code: d0 00 00 00 f0 45 7d c0 bf 00 20 00 00 48 89 83 c0 00 00 00 48 89 83 c8 00 00 00 e8 55 c1 8c c0 83 4b 04 10 48 83 c4 08 5b 5d c3 <0f> 0b 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 55 41 54 53 48 83 [ 989.771892] RIP [<ffffffffc07d4316>] __user_dlm_queue_lockres.part.4+0x76/0x80 [ocfs2_dlmfs] [ 989.772174] RSP <ffff88017f7cbcb8> [ 989.772704] ---[ end trace ebd1e38cebcc93a8 ]--- [ 989.772907] Kernel panic - not syncing: Fatal exception [ 989.773173] Kernel Offset: disabled Link: https://lkml.kernel.org/r/20220518235224.87100-2-junxiao.bi@oracle.com Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com> Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com> Cc: Mark Fasheh <mark@fasheh.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Joseph Qi <jiangqi903@gmail.com> Cc: Changwei Ge <gechangwei@live.cn> Cc: Gang He <ghe@suse.com> Cc: Jun Piao <piaojun@huawei.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-06-14 18:11:46 +02:00
..
cluster	ocfs2: fix a use after free on error	2021-03-04 10:26:39 +01:00
dlm	ocfs2: make local header paths relative to C files	2020-02-24 08:37:00 +01:00
dlmfs	ocfs2: dlmfs: fix error handling of user_dlm_destroy_lock	2022-06-14 18:11:46 +02:00
acl.c	ocfs2: fix passing zero to 'PTR_ERR' warning	2020-01-04 19:18:30 +01:00
acl.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174	2019-05-30 11:26:41 -07:00
alloc.c	ocfs2: fix data corruption after conversion from inline format	2021-10-27 09:54:27 +02:00
alloc.h
aops.c	ocfs2: fix deadlock between setattr and dio_end_io_write	2021-04-14 08:24:10 +02:00
aops.h
blockcheck.c	ocfs2: further debugfs cleanups	2019-09-24 15:54:07 -07:00
blockcheck.h	ocfs: no need to check return value of debugfs_create functions	2019-07-12 11:05:41 -07:00
buffer_head_io.c
buffer_head_io.h
dcache.c	fs/ocfs2: fix race in ocfs2_dentry_attach_lock()	2019-06-13 17:34:56 -10:00
dcache.h
dir.c	fs/ocfs2/dir.c: remove set but not used variables	2019-09-24 15:54:07 -07:00
dir.h
dlmglue.c	ocfs2: drop acl cache for directories too	2021-09-30 10:09:20 +02:00
dlmglue.h
export.c
export.h
extent_map.c	ocfs2: delete unnecessary checks before brelse()	2019-09-24 15:54:07 -07:00
extent_map.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 405	2019-06-05 17:37:13 +02:00
file.c	ocfs2: fix data corruption on truncate	2021-11-17 09:48:17 +01:00
file.h
filecheck.c	ocfs2: fix snprintf() checking	2021-07-14 16:53:25 +02:00
filecheck.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 286	2019-06-05 17:36:37 +02:00
heartbeat.c
heartbeat.h
inode.c	ocfs2: fix spelling mistake "ambigous" -> "ambiguous"	2019-09-24 15:54:07 -07:00
inode.h
ioctl.c	fs: ocfs2: fix a possible null-pointer dereference in ocfs2_info_scan_inode_alloc()	2019-10-07 15:47:19 -07:00
ioctl.h
journal.c	ocfs2: call journal flush to mark journal as empty after journal recovery when mount	2020-01-17 19:49:08 +01:00
journal.h	ocfs2: fix a NULL pointer dereference when call ocfs2_update_inode_fsync_trans()	2020-02-24 08:37:00 +01:00
Kconfig
localalloc.c	ocfs2: fix panic due to ocfs2_wq is null	2019-10-19 06:32:32 -04:00
localalloc.h
locks.c
locks.h
Makefile
mmap.c
mmap.h
move_extents.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174	2019-05-30 11:26:41 -07:00
move_extents.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174	2019-05-30 11:26:41 -07:00
namei.c	fs/ocfs2/namei.c: remove set but not used variables	2019-09-24 15:54:07 -07:00
namei.h
ocfs1_fs_compat.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 405	2019-06-05 17:37:13 +02:00
ocfs2_fs.h	ocfs2: fix value of OCFS2_INVALID_SLOT	2020-06-30 15:37:09 -04:00
ocfs2_ioctl.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174	2019-05-30 11:26:41 -07:00
ocfs2_lockid.h
ocfs2_lockingver.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174	2019-05-30 11:26:41 -07:00
ocfs2_trace.h
ocfs2.h	ocfs2: change slot number type s16 to u16	2020-08-21 13:05:26 +02:00
quota_global.c	quota: Check that quota is not dirty before release	2019-12-17 19:56:43 +01:00
quota_local.c
quota.h
refcounttree.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174	2019-05-30 11:26:41 -07:00
refcounttree.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174	2019-05-30 11:26:41 -07:00
reservations.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174	2019-05-30 11:26:41 -07:00
reservations.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174	2019-05-30 11:26:41 -07:00
resize.c
resize.h
slot_map.c
slot_map.h
stack_o2cb.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 286	2019-06-05 17:36:37 +02:00
stack_user.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 286	2019-06-05 17:36:37 +02:00
stackglue.c	ocfs2: fix snprintf() checking	2021-07-14 16:53:25 +02:00
stackglue.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 286	2019-06-05 17:36:37 +02:00
suballoc.c	ocfs2: change slot number type s16 to u16	2020-08-21 13:05:26 +02:00
suballoc.h
super.c	ocfs2: fix crash when initialize filecheck kobj fails	2022-03-23 09:12:06 +01:00
super.h
symlink.c
symlink.h
sysfile.c
sysfile.h
uptodate.c
uptodate.h
xattr.c	Revert "fs: ocfs2: fix possible null-pointer dereferences in ocfs2_xa_prepare_entry()"	2019-11-22 09:11:18 -08:00
xattr.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174	2019-05-30 11:26:41 -07:00