JBD2: Ignoring recovery information on journal
ocfs2: Mounting device (7,5) on (node local, slot 0) with ordered data mode.
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.5.255/5401 is trying to acquire lock:
ffff88805449b488 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6
){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:764 [inline]
){+.+.}-{3:3}, at: ocfs2_move_extent fs/ocfs2/move_extents.c:648 [inline]
){+.+.}-{3:3}, at: __ocfs2_move_extents_range+0x1a31/0x3450 fs/ocfs2/move_extents.c:868

but task is already holding lock:
ffff8880568c89c8
 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}
, at: inode_lock include/linux/fs.h:764 [inline]
, at: ocfs2_move_extent fs/ocfs2/move_extents.c:640 [inline]
, at: __ocfs2_move_extents_range+0x131f/0x3450 fs/ocfs2/move_extents.c:868

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]
#5){+.+.}-{3:3}:
       down_write+0x36/0x60 kernel/locking/rwsem.c:1573
       inode_lock include/linux/fs.h:764 [inline]
       __ocfs2_flush_truncate_log+0x36a/0x1220 fs/ocfs2/alloc.c:6046
       ocfs2_flush_truncate_log+0x4b/0x60 fs/ocfs2/alloc.c:6076
       ocfs2_sync_fs+0x119/0x330 fs/ocfs2/super.c:402
       sync_filesystem+0x1be/0x220 fs/sync.c:66
       generic_shutdown_super+0x6b/0x340 fs/super.c:474
       kill_block_super+0x7c/0xe0 fs/super.c:1481
       deactivate_locked_super+0x93/0xf0 fs/super.c:332
       cleanup_mnt+0x471/0x4f0 fs/namespace.c:1191
       task_work_run+0x1d0/0x260 kernel/task_work.c:203
       resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
       exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:180
       exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:213
       __syscall_exit_to_user_mode_work kernel/entry/common.c:295 [inline]
       syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:306
       do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
       entry_SYSCALL_64_after_hwframe+0x68/0xd2

-> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}
:
       check_prev_add kernel/locking/lockdep.c:3162 [inline]
       check_prevs_add kernel/locking/lockdep.c:3281 [inline]
       validate_chain kernel/locking/lockdep.c:3897 [inline]
       __lock_acquire+0x3a03/0x7ea0 kernel/locking/lockdep.c:5171
       lock_acquire+0x1bc/0x4a0 kernel/locking/lockdep.c:5790
       down_write+0x36/0x60 kernel/locking/rwsem.c:1573
       inode_lock include/linux/fs.h:764 [inline]
       ocfs2_move_extent fs/ocfs2/move_extents.c:648 [inline]
       __ocfs2_move_extents_range+0x1a31/0x3450 fs/ocfs2/move_extents.c:868
       ocfs2_move_extents+0x409/0xa40 fs/ocfs2/move_extents.c:940
       ocfs2_ioctl_move_extents+0x4d4/0x6e0 fs/ocfs2/move_extents.c:1066
       ocfs2_ioctl+0x31d/0x7c0 fs/ocfs2/ioctl.c:946
       vfs_ioctl fs/ioctl.c:51 [inline]
       __do_sys_ioctl fs/ioctl.c:870 [inline]
       __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:856
       do_syscall_x64 arch/x86/entry/common.c:46 [inline]
       do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
       entry_SYSCALL_64_after_hwframe+0x68/0xd2

other info that might help us debug this:

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5);
                               lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6);
                               lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5);
  lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6);

 *** DEADLOCK ***

5 locks held by syz.5.255/5401:
 #0: ffff888019e4a460 (sb_writers#19){.+.+}-{0:0}, at: mnt_want_write_file+0x5c/0x200 fs/namespace.c:446
 #1: ffff88805449c2c8 (&sb->s_type->i_mutex_key#26){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:764 [inline]
 #1: ffff88805449c2c8 (&sb->s_type->i_mutex_key#26){+.+.}-{3:3}, at: ocfs2_move_extents+0x19d/0xa40 fs/ocfs2/move_extents.c:918
 #2: ffff88805449bf60 (&oi->ip_alloc_sem){++++}-{3:3}, at: ocfs2_move_extents+0x3fc/0xa40 fs/ocfs2/move_extents.c:938
 #3: ffff8880568cd108 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:764 [inline]
 #3: ffff8880568cd108 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x16a/0x4810 fs/ocfs2/suballoc.c:804
 #4: ffff8880568c89c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:764 [inline]
 #4: ffff8880568c89c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}, at: ocfs2_move_extent fs/ocfs2/move_extents.c:640 [inline]
 #4: ffff8880568c89c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}, at: __ocfs2_move_extents_range+0x131f/0x3450 fs/ocfs2/move_extents.c:868

stack backtrace:
CPU: 1 PID: 5401 Comm: syz.5.255 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106
 check_noncircular+0x2f8/0x400 kernel/locking/lockdep.c:2215
 check_prev_add kernel/locking/lockdep.c:3162 [inline]
 check_prevs_add kernel/locking/lockdep.c:3281 [inline]
 validate_chain kernel/locking/lockdep.c:3897 [inline]
 __lock_acquire+0x3a03/0x7ea0 kernel/locking/lockdep.c:5171
 lock_acquire+0x1bc/0x4a0 kernel/locking/lockdep.c:5790
 down_write+0x36/0x60 kernel/locking/rwsem.c:1573
 inode_lock include/linux/fs.h:764 [inline]
 ocfs2_move_extent fs/ocfs2/move_extents.c:648 [inline]
 __ocfs2_move_extents_range+0x1a31/0x3450 fs/ocfs2/move_extents.c:868
 ocfs2_move_extents+0x409/0xa40 fs/ocfs2/move_extents.c:940
 ocfs2_ioctl_move_extents+0x4d4/0x6e0 fs/ocfs2/move_extents.c:1066
 ocfs2_ioctl+0x31d/0x7c0 fs/ocfs2/ioctl.c:946
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f7e4b79f559
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7e4c671028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f7e4ba25fa0 RCX: 00007f7e4b79f559
RDX: 0000200000004c40 RSI: 0000000040406f06 RDI: 0000000000000005
RBP: 00007f7e4b836b50 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7e4ba26038 R14: 00007f7e4ba25fa0 R15: 00007ffce40150b8
 </TASK>
kcov: kcov_task_exit: t = ffff88804f9bbc00, kcov->t = ffff88804f9bbc00