BTRFS error (device loop0): failed to run delayed ref for logical 5382144 num_bytes 65536 type 178 action 1 ref_mod 1: -2
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BTRFS: Transaction aborted (error -2)
WARNING: fs/btrfs/extent-tree.c:2247 at btrfs_run_delayed_refs+0x30b/0x3b0 fs/btrfs/extent-tree.c:2247, CPU#1: syz-executor/5847
Modules linked in:
CPU: 1 UID: 0 PID: 5847 Comm: syz-executor Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:btrfs_run_delayed_refs+0x30e/0x3b0 fs/btrfs/extent-tree.c:2247
Code: 85 e4 75 07 e8 13 2d e1 fd eb 7a e8 8c 46 c6 fd 84 c0 74 20 e8 03 2d e1 fd eb 6a e8 fc 2c e1 fd 48 8d 3d 55 f0 35 0c 44 89 fe <67> 48 0f b9 3a e9 0b ff ff ff e8 b3 92 ce 07 41 89 c4 31 ff 89 c6
RSP: 0018:ffffc90004867998 EFLAGS: 00010293
RAX: ffffffff83e57604 RBX: ffff88805856fa70 RCX: ffff88807b125b80
RDX: 0000000000000000 RSI: 00000000fffffffe RDI: ffffffff901b6660
RBP: 0000000000000000 R08: ffff88807b125b80 R09: 0000000000000003
R10: 00000000fffffffb R11: 0000000000000000 R12: ffff888057fd8001
R13: ffff88807defc000 R14: dffffc0000000000 R15: 00000000fffffffe
FS:  000055558ed77500(0000) GS:ffff888125536000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f70b1748060 CR3: 000000006355e000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 btrfs_commit_transaction+0x29a/0x3130 fs/btrfs/transaction.c:2262
 sync_filesystem+0x1cf/0x230 fs/sync.c:66
 generic_shutdown_super+0x77/0x2d0 fs/super.c:625
 kill_anon_super+0x3b/0x70 fs/super.c:1292
 btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2127
 deactivate_locked_super+0xbc/0x130 fs/super.c:476
 cleanup_mnt+0x437/0x4d0 fs/namespace.c:1312
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:67 [inline]
 exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:238 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:269 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline]
 do_syscall_64+0x32d/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f30a539d9d7
Code: a2 c7 05 1c fd 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 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 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffc17d6a5d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f30a5432050 RCX: 00007f30a539d9d7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc17d6a690
RBP: 00007ffc17d6a690 R08: 00007ffc17d6b690 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc17d6b720
R13: 00007f30a5432050 R14: 0000000000018f14 R15: 00007ffc17d6b760
 </TASK>
----------------
Code disassembly (best guess):
   0:	85 e4                	test   %esp,%esp
   2:	75 07                	jne    0xb
   4:	e8 13 2d e1 fd       	call   0xfde12d1c
   9:	eb 7a                	jmp    0x85
   b:	e8 8c 46 c6 fd       	call   0xfdc6469c
  10:	84 c0                	test   %al,%al
  12:	74 20                	je     0x34
  14:	e8 03 2d e1 fd       	call   0xfde12d1c
  19:	eb 6a                	jmp    0x85
  1b:	e8 fc 2c e1 fd       	call   0xfde12d1c
  20:	48 8d 3d 55 f0 35 0c 	lea    0xc35f055(%rip),%rdi        # 0xc35f07c
  27:	44 89 fe             	mov    %r15d,%esi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	e9 0b ff ff ff       	jmp    0xffffff3f
  34:	e8 b3 92 ce 07       	call   0x7ce92ec
  39:	41 89 c4             	mov    %eax,%r12d
  3c:	31 ff                	xor    %edi,%edi
  3e:	89 c6                	mov    %eax,%esi