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linux-stable/fs/ocfs2
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Junxiao Bi 91d8b24ba5 ocfs2: fix panic on nfs server over ocfs2 
commit e5a15e17a7 upstream.

The following kernel panic was captured when running nfs server over
ocfs2, at that time ocfs2_test_inode_bit() was checking whether one
inode locating at "blkno" 5 was valid, that is ocfs2 root inode, its
"suballoc_slot" was OCFS2_INVALID_SLOT(65535) and it was allocted from
//global_inode_alloc, but here it wrongly assumed that it was got from per
slot inode alloctor which would cause array overflow and trigger kernel
panic.

  BUG: unable to handle kernel paging request at 0000000000001088
  IP: [<ffffffff816f6898>] _raw_spin_lock+0x18/0xf0
  PGD 1e06ba067 PUD 1e9e7d067 PMD 0
  Oops: 0002 [#1] SMP
  CPU: 6 PID: 24873 Comm: nfsd Not tainted 4.1.12-124.36.1.el6uek.x86_64 #2
  Hardware name: Huawei CH121 V3/IT11SGCA1, BIOS 3.87 02/02/2018
  RIP: _raw_spin_lock+0x18/0xf0
  RSP: e02b:ffff88005ae97908  EFLAGS: 00010206
  RAX: ffff88005ae98000 RBX: 0000000000001088 RCX: 0000000000000000
  RDX: 0000000000020000 RSI: 0000000000000009 RDI: 0000000000001088
  RBP: ffff88005ae97928 R08: 0000000000000000 R09: ffff880212878e00
  R10: 0000000000007ff0 R11: 0000000000000000 R12: 0000000000001088
  R13: ffff8800063c0aa8 R14: ffff8800650c27d0 R15: 000000000000ffff
  FS:  0000000000000000(0000) GS:ffff880218180000(0000) knlGS:ffff880218180000
  CS:  e033 DS: 0000 ES: 0000 CR0: 0000000080050033
  CR2: 0000000000001088 CR3: 00000002033d0000 CR4: 0000000000042660
  Call Trace:
    igrab+0x1e/0x60
    ocfs2_get_system_file_inode+0x63/0x3a0 [ocfs2]
    ocfs2_test_inode_bit+0x328/0xa00 [ocfs2]
    ocfs2_get_parent+0xba/0x3e0 [ocfs2]
    reconnect_path+0xb5/0x300
    exportfs_decode_fh+0xf6/0x2b0
    fh_verify+0x350/0x660 [nfsd]
    nfsd4_putfh+0x4d/0x60 [nfsd]
    nfsd4_proc_compound+0x3d3/0x6f0 [nfsd]
    nfsd_dispatch+0xe0/0x290 [nfsd]
    svc_process_common+0x412/0x6a0 [sunrpc]
    svc_process+0x123/0x210 [sunrpc]
    nfsd+0xff/0x170 [nfsd]
    kthread+0xcb/0xf0
    ret_from_fork+0x61/0x90
  Code: 83 c2 02 0f b7 f2 e8 18 dc 91 ff 66 90 eb bf 0f 1f 40 00 55 48 89 e5 41 56 41 55 41 54 53 0f 1f 44 00 00 48 89 fb ba 00 00 02 00 <f0> 0f c1 17 89 d0 45 31 e4 45 31 ed c1 e8 10 66 39 d0 41 89 c6
  RIP   _raw_spin_lock+0x18/0xf0
  CR2: 0000000000001088
  ---[ end trace 7264463cd1aac8f9 ]---
  Kernel panic - not syncing: Fatal exception

Link: http://lkml.kernel.org/r/20200616183829.87211-4-junxiao.bi@oracle.com
Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Jun Piao <piaojun@huawei.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-06-30 15:38:08 -04:00
..
cluster ocfs2: fix a panic problem caused by o2cb_ctl 2019-04-05 22:31:27 +02:00
dlm fs/ocfs2/dlm/dlmdebug.c: fix a sleep-in-atomic-context bug in dlm_print_one_mle() 2019-12-01 09:13:48 +01:00
dlmfs ocfs2: improve ocfs2 Makefile 2019-02-12 19:46:09 +01:00
acl.c ocfs2: fix passing zero to 'PTR_ERR' warning 2020-01-04 13:59:56 +01:00
acl.h ocfs2: make ocfs2_set_acl() static 2017-09-06 17:27:24 -07:00
alloc.c ocfs2: no need try to truncate file beyond i_size 2020-04-24 08:00:43 +02:00
alloc.h ocfs2: clean up some dead code 2017-09-06 17:27:24 -07:00
aops.c fs: ocfs2: fix a possible null-pointer dereference in ocfs2_write_end_nolock() 2019-11-06 12:43:15 +01:00
aops.h
blockcheck.c
blockcheck.h
buffer_head_io.c ocfs2: don't put and assigning null to bh allocated outside 2019-12-01 09:14:00 +01:00
buffer_head_io.h
dcache.c fs/ocfs2: fix race in ocfs2_dentry_attach_lock() 2019-06-19 08:20:54 +02:00
dcache.h
dir.c ocfs2: fix a misuse a of brelse after failing ocfs2_check_dir_entry 2018-11-21 09:24:09 +01:00
dir.h
dlmglue.c ocfs2: remove ocfs2_is_o2cb_active() 2019-12-01 09:14:20 +01:00
dlmglue.h
export.c ocfs2: fix ocfs2 read inode data panic in ocfs2_iget 2019-05-21 18:50:17 +02:00
export.h
extent_map.c
extent_map.h
file.c ocfs2: should wait dio before inode lock in ocfs2_setattr() 2017-11-24 08:37:04 +01:00
file.h
filecheck.c
filecheck.h
heartbeat.c
heartbeat.h
inode.c ocfs2: fix a static checker warning 2017-07-06 16:24:30 -07:00
inode.h
ioctl.c fs: ocfs2: fix a possible null-pointer dereference in ocfs2_info_scan_inode_alloc() 2019-11-06 12:43:15 +01:00
ioctl.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
journal.c ocfs2: call journal flush to mark journal as empty after journal recovery when mount 2020-01-17 19:45:55 +01:00
journal.h ocfs2: fix a NULL pointer dereference when call ocfs2_update_inode_fsync_trans() 2020-02-28 16:36:08 +01:00
Kconfig
localalloc.c ocfs2: fix panic due to ocfs2_wq is null 2019-10-29 09:17:00 +01:00
localalloc.h
locks.c
locks.h
Makefile ocfs2: improve ocfs2 Makefile 2019-02-12 19:46:09 +01:00
mmap.c
mmap.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
move_extents.c ocfs2: fix clusters leak in ocfs2_defrag_extent() 2019-12-01 09:14:00 +01:00
move_extents.h
namei.c
namei.h
ocfs1_fs_compat.h
ocfs2.h ocfs2: clean up some dead code 2017-09-06 17:27:24 -07:00
ocfs2_fs.h ocfs2: fix value of OCFS2_INVALID_SLOT 2020-06-30 15:38:08 -04:00
ocfs2_ioctl.h
ocfs2_lockid.h
ocfs2_lockingver.h
ocfs2_trace.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
quota.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
quota_global.c quota: Check that quota is not dirty before release 2019-12-17 20:39:43 +01:00
quota_local.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
refcounttree.c ocfs2: fix inode bh swapping mixup in ocfs2_reflink_inodes_lock 2019-04-03 06:25:17 +02:00
refcounttree.h
reservations.c
reservations.h
resize.c
resize.h
slot_map.c
slot_map.h
stack_o2cb.c
stack_user.c
stackglue.c ocfs2: remove ocfs2_is_o2cb_active() 2019-12-01 09:14:20 +01:00
stackglue.h ocfs2: remove ocfs2_is_o2cb_active() 2019-12-01 09:14:20 +01:00
suballoc.c ocfs2: fix panic on nfs server over ocfs2 2020-06-30 15:38:08 -04:00
suballoc.h
super.c ocfs2: return -EROFS to mount.ocfs2 if inode block is invalid 2018-04-26 11:02:14 +02:00
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()" 2019-12-01 09:13:14 +01:00
xattr.h