======================================================
WARNING: possible circular locking dependency detected
6.15.0-rc4-syzkaller-00291-g2a239ffbebb5 #0 Not tainted
------------------------------------------------------
syz-executor/5824 is trying to acquire lock:
ffff8880573fd100 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
ffff8880573fd100 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: __ocfs2_flush_truncate_log+0x31e/0x1160 fs/ocfs2/alloc.c:6054

but task is already holding lock:
ffff8880572d3480 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
ffff8880572d3480 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{4:4}, at: ocfs2_flush_truncate_log+0x42/0x70 fs/ocfs2/alloc.c:6083

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]#6){+.+.}-{4:4}:
       down_write+0x92/0x200 kernel/locking/rwsem.c:1577
       inode_lock include/linux/fs.h:867 [inline]
       ocfs2_move_extent+0x6ea/0x17f0 fs/ocfs2/move_extents.c:640
       __ocfs2_move_extents_range fs/ocfs2/move_extents.c:860 [inline]
       ocfs2_move_extents+0xd69/0x1980 fs/ocfs2/move_extents.c:927
       ocfs2_ioctl_move_extents+0x54d/0xb20 fs/ocfs2/move_extents.c:1053
       ocfs2_ioctl+0x3c6/0x6f0 fs/ocfs2/ioctl.c:946
       vfs_ioctl fs/ioctl.c:51 [inline]
       __do_sys_ioctl fs/ioctl.c:906 [inline]
       __se_sys_ioctl fs/ioctl.c:892 [inline]
       __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:892
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}:
       check_prev_add kernel/locking/lockdep.c:3166 [inline]
       check_prevs_add kernel/locking/lockdep.c:3285 [inline]
       validate_chain kernel/locking/lockdep.c:3909 [inline]
       __lock_acquire+0x1173/0x1ba0 kernel/locking/lockdep.c:5235
       lock_acquire kernel/locking/lockdep.c:5866 [inline]
       lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5823
       down_write+0x92/0x200 kernel/locking/rwsem.c:1577
       inode_lock include/linux/fs.h:867 [inline]
       __ocfs2_flush_truncate_log+0x31e/0x1160 fs/ocfs2/alloc.c:6054
       ocfs2_flush_truncate_log+0x4a/0x70 fs/ocfs2/alloc.c:6084
       ocfs2_sync_fs+0x1c6/0x3d0 fs/ocfs2/super.c:406
       sync_filesystem+0x1d0/0x290 fs/sync.c:66
       generic_shutdown_super+0x74/0x390 fs/super.c:621
       kill_block_super+0x3b/0x90 fs/super.c:1710
       deactivate_locked_super+0xc1/0x1a0 fs/super.c:473
       deactivate_super fs/super.c:506 [inline]
       deactivate_super+0xde/0x100 fs/super.c:502
       cleanup_mnt+0x225/0x450 fs/namespace.c:1435
       task_work_run+0x150/0x240 kernel/task_work.c:227
       resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
       exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
       exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
       __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
       syscall_exit_to_user_mode+0x27b/0x2a0 kernel/entry/common.c:218
       do_syscall_64+0xda/0x260 arch/x86/entry/syscall_64.c:100
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

 Possible unsafe locking scenario:

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

 *** DEADLOCK ***

2 locks held by syz-executor/5824:
 #0: ffff8880585b40e0 (&type->s_umount_key#57){+.+.}-{4:4}, at: __super_lock fs/super.c:56 [inline]
 #0: ffff8880585b40e0 (&type->s_umount_key#57){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
 #0: ffff8880585b40e0 (&type->s_umount_key#57){+.+.}-{4:4}, at: deactivate_super fs/super.c:505 [inline]
 #0: ffff8880585b40e0 (&type->s_umount_key#57){+.+.}-{4:4}, at: deactivate_super+0xd6/0x100 fs/super.c:502
 #1: ffff8880572d3480 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
 #1: ffff8880572d3480 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{4:4}, at: ocfs2_flush_truncate_log+0x42/0x70 fs/ocfs2/alloc.c:6083

stack backtrace:
CPU: 1 UID: 0 PID: 5824 Comm: syz-executor Not tainted 6.15.0-rc4-syzkaller-00291-g2a239ffbebb5 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 print_circular_bug+0x275/0x350 kernel/locking/lockdep.c:2079
 check_noncircular+0x14c/0x170 kernel/locking/lockdep.c:2211
 check_prev_add kernel/locking/lockdep.c:3166 [inline]
 check_prevs_add kernel/locking/lockdep.c:3285 [inline]
 validate_chain kernel/locking/lockdep.c:3909 [inline]
 __lock_acquire+0x1173/0x1ba0 kernel/locking/lockdep.c:5235
 lock_acquire kernel/locking/lockdep.c:5866 [inline]
 lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5823
 down_write+0x92/0x200 kernel/locking/rwsem.c:1577
 inode_lock include/linux/fs.h:867 [inline]
 __ocfs2_flush_truncate_log+0x31e/0x1160 fs/ocfs2/alloc.c:6054
 ocfs2_flush_truncate_log+0x4a/0x70 fs/ocfs2/alloc.c:6084
 ocfs2_sync_fs+0x1c6/0x3d0 fs/ocfs2/super.c:406
 sync_filesystem+0x1d0/0x290 fs/sync.c:66
 generic_shutdown_super+0x74/0x390 fs/super.c:621
 kill_block_super+0x3b/0x90 fs/super.c:1710
 deactivate_locked_super+0xc1/0x1a0 fs/super.c:473
 deactivate_super fs/super.c:506 [inline]
 deactivate_super+0xde/0x100 fs/super.c:502
 cleanup_mnt+0x225/0x450 fs/namespace.c:1435
 task_work_run+0x150/0x240 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x27b/0x2a0 kernel/entry/common.c:218
 do_syscall_64+0xda/0x260 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc6f198fc97
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007fff48308e28 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fc6f1a1089d RCX: 00007fc6f198fc97
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff48308ee0
RBP: 00007fff48308ee0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff48309f70
R13: 00007fc6f1a1089d R14: 000000000001dab0 R15: 00007fff48309fb0
 </TASK>
ocfs2: Unmounting device (7,1) on (node local)
syz-executor: attempt to access beyond end of device
loop1: rw=2049, sector=45168, nr_sectors = 8 limit=40427
CPU: 0 UID: 0 PID: 5824 Comm: syz-executor Not tainted 6.15.0-rc4-syzkaller-00291-g2a239ffbebb5 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
 f2fs_handle_critical_error+0x621/0x9f0 fs/f2fs/super.c:4276
 f2fs_write_end_io+0x73d/0xac0 fs/f2fs/data.c:353
 bio_endio+0x6d2/0x810 block/bio.c:1551
 submit_bio_noacct+0x56d/0x1ec0 block/blk-core.c:881
 __submit_merged_bio+0x33c/0x770 fs/f2fs/data.c:543
 __f2fs_submit_merged_write fs/f2fs/data.c:639 [inline]
 __submit_merged_write_cond+0x319/0x3f0 fs/f2fs/data.c:661
 f2fs_submit_merged_write_cond fs/f2fs/data.c:678 [inline]
 f2fs_write_cache_pages+0x2139/0x2680 fs/f2fs/data.c:3215
 __f2fs_write_data_pages fs/f2fs/data.c:3296 [inline]
 f2fs_write_data_pages+0x4ad/0xd90 fs/f2fs/data.c:3323
 do_writepages+0x1b5/0x820 mm/page-writeback.c:2656
 filemap_fdatawrite_wbc mm/filemap.c:386 [inline]
 filemap_fdatawrite_wbc+0x104/0x160 mm/filemap.c:376
 __filemap_fdatawrite_range+0xb2/0xf0 mm/filemap.c:419
 f2fs_sync_dirty_inodes+0x2a9/0x990 fs/f2fs/checkpoint.c:1117
 block_operations+0x2a3/0xfd0 fs/f2fs/checkpoint.c:1257
 f2fs_write_checkpoint+0x2b8/0x45b0 fs/f2fs/checkpoint.c:1652
 kill_f2fs_super+0x3c2/0x470 fs/f2fs/super.c:5026
 deactivate_locked_super+0xc1/0x1a0 fs/super.c:473
 deactivate_super fs/super.c:506 [inline]
 deactivate_super+0xde/0x100 fs/super.c:502
 cleanup_mnt+0x225/0x450 fs/namespace.c:1435
 task_work_run+0x150/0x240 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x27b/0x2a0 kernel/entry/common.c:218
 do_syscall_64+0xda/0x260 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc6f198fc97
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007fff48308e28 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fc6f1a1089d RCX: 00007fc6f198fc97
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff48308ee0
RBP: 00007fff48308ee0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff48309f70
R13: 00007fc6f1a1089d R14: 000000000001e403 R15: 00007fff48309fb0
 </TASK>
F2FS-fs (loop1): Stopped filesystem due to reason: 3