syzbot


possible deadlock in ocfs2_calc_xattr_init

Status: upstream: reported on 2024/10/04 01:35
Subsystems: ocfs2
[Documentation on labels]
Reported-by: syzbot+6f7edba4b1e2ca109d7f@syzkaller.appspotmail.com
First crash: 134d, last: 4h12m
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [ocfs2?] possible deadlock in ocfs2_calc_xattr_init 0 (1) 2024/10/04 01:35
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 possible deadlock in ocfs2_calc_xattr_init 6 36d 70d 0/3 upstream: reported on 2024/12/03 04:25
linux-5.15 possible deadlock in ocfs2_calc_xattr_init 12 20d 150d 0/3 upstream: reported on 2024/09/14 01:52

Sample crash report:
ocfs2: Mounting device (7,1) on (node local, slot 0) with ordered data mode.
======================================================
WARNING: possible circular locking dependency detected
6.14.0-rc1-syzkaller-00187-g8f6629c004b1 #0 Not tainted
------------------------------------------------------
syz.1.165/6728 is trying to acquire lock:
ffff888056dbce38 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_calc_xattr_init+0x208/0xd70 fs/ocfs2/xattr.c:627

but task is already holding lock:
ffff888056cd42c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:877 [inline]
ffff888056cd42c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x192/0x4e70 fs/ocfs2/suballoc.c:786

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}:
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
       down_write+0x99/0x220 kernel/locking/rwsem.c:1577
       inode_lock include/linux/fs.h:877 [inline]
       ocfs2_remove_inode fs/ocfs2/inode.c:669 [inline]
       ocfs2_wipe_inode fs/ocfs2/inode.c:832 [inline]
       ocfs2_delete_inode fs/ocfs2/inode.c:1093 [inline]
       ocfs2_evict_inode+0x209f/0x4630 fs/ocfs2/inode.c:1230
       evict+0x4ea/0x9a0 fs/inode.c:796
       d_delete_notify include/linux/fsnotify.h:376 [inline]
       vfs_rmdir+0x3d7/0x510 fs/namei.c:4409
       do_rmdir+0x3b5/0x580 fs/namei.c:4455
       __do_sys_rmdir fs/namei.c:4474 [inline]
       __se_sys_rmdir fs/namei.c:4472 [inline]
       __x64_sys_rmdir+0x47/0x50 fs/namei.c:4472
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{4:4}:
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
       down_write+0x99/0x220 kernel/locking/rwsem.c:1577
       inode_lock include/linux/fs.h:877 [inline]
       ocfs2_del_inode_from_orphan+0x159/0x800 fs/ocfs2/namei.c:2727
       ocfs2_dio_end_io_write fs/ocfs2/aops.c:2310 [inline]
       ocfs2_dio_end_io+0x55b/0x1250 fs/ocfs2/aops.c:2408
       dio_complete+0x252/0x720 fs/direct-io.c:281
       __blockdev_direct_IO+0x3eb6/0x4890 fs/direct-io.c:1303
       ocfs2_direct_IO+0x255/0x2c0 fs/ocfs2/aops.c:2445
       generic_file_direct_write+0x1e8/0x400 mm/filemap.c:4112
       __generic_file_write_iter+0x126/0x230 mm/filemap.c:4276
       ocfs2_file_write_iter+0x19af/0x2180 fs/ocfs2/file.c:2469
       new_sync_write fs/read_write.c:586 [inline]
       vfs_write+0xad1/0xd10 fs/read_write.c:679
       ksys_write+0x18f/0x2b0 fs/read_write.c:731
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}:
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
       down_write+0x99/0x220 kernel/locking/rwsem.c:1577
       ocfs2_try_remove_refcount_tree+0xb6/0x330 fs/ocfs2/refcounttree.c:932
       ocfs2_truncate_file+0xe1b/0x1560 fs/ocfs2/file.c:521
       ocfs2_setattr+0x1890/0x1ef0 fs/ocfs2/file.c:1212
       notify_change+0xbcc/0xe90 fs/attr.c:552
       do_truncate+0x220/0x310 fs/open.c:65
       handle_truncate fs/namei.c:3451 [inline]
       do_open fs/namei.c:3834 [inline]
       path_openat+0x2e1b/0x3590 fs/namei.c:3989
       do_filp_open+0x27f/0x4e0 fs/namei.c:4016
       do_sys_openat2+0x13e/0x1d0 fs/open.c:1428
       do_sys_open fs/open.c:1443 [inline]
       __do_sys_openat fs/open.c:1459 [inline]
       __se_sys_openat fs/open.c:1454 [inline]
       __x64_sys_openat+0x247/0x2a0 fs/open.c:1454
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&oi->ip_xattr_sem){++++}-{4:4}:
       check_prev_add kernel/locking/lockdep.c:3163 [inline]
       check_prevs_add kernel/locking/lockdep.c:3282 [inline]
       validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3906
       __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5228
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
       down_read+0xb1/0xa40 kernel/locking/rwsem.c:1524
       ocfs2_calc_xattr_init+0x208/0xd70 fs/ocfs2/xattr.c:627
       ocfs2_mknod+0x1231/0x2b30 fs/ocfs2/namei.c:330
       ocfs2_create+0x1ab/0x470 fs/ocfs2/namei.c:673
       lookup_open fs/namei.c:3651 [inline]
       open_last_lookups fs/namei.c:3750 [inline]
       path_openat+0x193e/0x3590 fs/namei.c:3986
       do_filp_open+0x27f/0x4e0 fs/namei.c:4016
       do_sys_openat2+0x13e/0x1d0 fs/open.c:1428
       do_sys_open fs/open.c:1443 [inline]
       __do_sys_openat fs/open.c:1459 [inline]
       __se_sys_openat fs/open.c:1454 [inline]
       __x64_sys_openat+0x247/0x2a0 fs/open.c:1454
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

Chain exists of:
  &oi->ip_xattr_sem --> &ocfs2_sysfile_lock_key[args->fi_sysfile_type] --> &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2);
                               lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]);
                               lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2);
  rlock(&oi->ip_xattr_sem);

 *** DEADLOCK ***

3 locks held by syz.1.165/6728:
 #0: ffff888053b34420 (sb_writers#14){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:547
 #1: ffff888056dbd100 (&type->i_mutex_dir_key#8){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:877 [inline]
 #1: ffff888056dbd100 (&type->i_mutex_dir_key#8){+.+.}-{4:4}, at: open_last_lookups fs/namei.c:3747 [inline]
 #1: ffff888056dbd100 (&type->i_mutex_dir_key#8){+.+.}-{4:4}, at: path_openat+0x89a/0x3590 fs/namei.c:3986
 #2: ffff888056cd42c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:877 [inline]
 #2: ffff888056cd42c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x192/0x4e70 fs/ocfs2/suballoc.c:786

stack backtrace:
CPU: 0 UID: 0 PID: 6728 Comm: syz.1.165 Not tainted 6.14.0-rc1-syzkaller-00187-g8f6629c004b1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2076
 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2208
 check_prev_add kernel/locking/lockdep.c:3163 [inline]
 check_prevs_add kernel/locking/lockdep.c:3282 [inline]
 validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3906
 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5228
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
 down_read+0xb1/0xa40 kernel/locking/rwsem.c:1524
 ocfs2_calc_xattr_init+0x208/0xd70 fs/ocfs2/xattr.c:627
 ocfs2_mknod+0x1231/0x2b30 fs/ocfs2/namei.c:330
 ocfs2_create+0x1ab/0x470 fs/ocfs2/namei.c:673
 lookup_open fs/namei.c:3651 [inline]
 open_last_lookups fs/namei.c:3750 [inline]
 path_openat+0x193e/0x3590 fs/namei.c:3986
 do_filp_open+0x27f/0x4e0 fs/namei.c:4016
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1428
 do_sys_open fs/open.c:1443 [inline]
 __do_sys_openat fs/open.c:1459 [inline]
 __se_sys_openat fs/open.c:1454 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1454
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5217f8cde9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5218d38038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f52181a5fa0 RCX: 00007f5217f8cde9
RDX: 0000000000000042 RSI: 0000400000000100 RDI: ffffffffffffff9c
RBP: 00007f521800e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000000001fd R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f52181a5fa0 R15: 00007fffebc6e428
 </TASK>

Crashes (100):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/02/08 19:25 upstream 8f6629c004b1 ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2025/01/31 20:24 upstream 69e858e0b8b2 aa47157c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2025/01/30 19:51 upstream d3d90cc2891c 9c8ab845 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2025/01/21 08:26 upstream 100ceb4817a2 6e87cfa2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root possible deadlock in ocfs2_calc_xattr_init
2025/01/16 16:56 upstream 619f0b6fad52 968edaf4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root possible deadlock in ocfs2_calc_xattr_init
2025/01/07 03:44 upstream 5428dc1906dd f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root possible deadlock in ocfs2_calc_xattr_init
2025/01/06 18:13 upstream 5428dc1906dd f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2025/01/05 23:36 upstream ab75170520d4 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2025/01/05 20:37 upstream ab75170520d4 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2025/01/03 22:41 upstream 0bc21e701a6f f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2025/01/02 19:16 upstream 56e6a3499e14 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2025/01/01 06:21 upstream ccb98ccef0e5 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2024/12/22 04:04 upstream a99b4a369a54 d7f584ee .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2024/12/15 22:43 upstream 2d8308bf5b67 7cbfbb3a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2024/12/13 00:01 upstream 150b567e0d57 941924eb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2024/12/11 08:00 upstream f92f4749861b cfc402b4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2024/12/11 06:31 upstream f92f4749861b cfc402b4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2024/12/11 02:01 upstream 7cb1b4663150 cfc402b4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2024/12/07 07:09 upstream b5f217084ab3 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root possible deadlock in ocfs2_calc_xattr_init
2024/12/07 07:09 upstream b5f217084ab3 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root possible deadlock in ocfs2_calc_xattr_init
2024/12/04 22:22 upstream feffde684ac2 b50eb251 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2024/11/29 04:09 upstream 7af08b57bcb9 5df23865 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root possible deadlock in ocfs2_calc_xattr_init
2024/11/28 22:08 upstream b86545e02e8c 5df23865 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2024/11/25 10:57 upstream 9f16d5e6f220 68da6d95 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2024/11/19 00:17 upstream adc218676eef 571351cb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2024/11/12 14:53 upstream 2d5404caa8c7 75bb1b32 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2024/11/03 07:13 upstream 3e5e6c9900c3 f00eed24 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2024/10/28 19:13 upstream 819837584309 9efb3cc7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2024/10/27 23:45 upstream 284a2f899676 65e8686b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2024/10/27 23:44 upstream 284a2f899676 65e8686b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2024/09/30 06:47 upstream e7ed34365879 ba29ff75 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root possible deadlock in ocfs2_calc_xattr_init
2024/09/30 01:31 upstream e7ed34365879 ba29ff75 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2025/02/11 05:07 linux-next df5d6180169a 43f51a00 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2025/02/08 17:05 linux-next ed58d103e6da ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2025/02/08 16:00 linux-next ed58d103e6da ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2025/02/03 23:36 linux-next 00f3246adeea a21a8419 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2025/02/03 16:15 linux-next 00f3246adeea a21a8419 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2025/01/13 08:23 linux-next 7b4b9bf203da 6dbc6a9b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2024/12/29 10:59 linux-next 8155b4ef3466 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2024/12/28 12:41 linux-next 8155b4ef3466 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2024/12/26 00:38 linux-next 8155b4ef3466 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2024/12/22 10:42 linux-next 8155b4ef3466 d7f584ee .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2024/12/08 23:01 linux-next af2ea8ab7a54 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2024/12/08 14:05 linux-next af2ea8ab7a54 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2024/12/03 19:30 linux-next f486c8aa16b8 578925bc .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2024/12/03 16:56 linux-next f486c8aa16b8 578925bc .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2024/12/02 08:45 linux-next f486c8aa16b8 68914665 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2024/11/20 04:22 linux-next 414c97c966b6 7d02db5a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2024/11/09 14:38 linux-next 929beafbe7ac 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2024/11/09 14:38 linux-next 929beafbe7ac 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2024/11/07 14:39 linux-next 74741a050b79 c069283c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
2024/11/04 10:42 linux-next 1ffec08567f4 f00eed24 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root possible deadlock in ocfs2_calc_xattr_init
* Struck through repros no longer work on HEAD.