BTRFS error (device loop0): failed to run delayed ref for logical 5378048 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#0: syz.0.0/5320
Modules linked in:
CPU: 0 UID: 0 PID: 5320 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:btrfs_run_delayed_refs+0x30e/0x3b0 fs/btrfs/extent-tree.c:2247
Code: 85 e4 75 07 e8 c3 66 e0 fd eb 7a e8 7c 6a c5 fd 84 c0 74 20 e8 b3 66 e0 fd eb 6a e8 ac 66 e0 fd 48 8d 3d 45 8e 35 0c 44 89 fe <67> 48 0f b9 3a e9 0b ff ff ff e8 f3 6d cb 07 41 89 c4 31 ff 89 c6
RSP: 0018:ffffc9000f5ef838 EFLAGS: 00010293
RAX: ffffffff83e549f4 RBX: ffff888047ad3940 RCX: ffff888000ee0000
RDX: 0000000000000000 RSI: 00000000fffffffe RDI: ffffffff901ad840
RBP: 0000000000000000 R08: ffff888000ee0000 R09: 0000000000000003
R10: 00000000fffffffb R11: 0000000000000000 R12: ffff8880429c8001
R13: ffff888043116000 R14: dffffc0000000000 R15: 00000000fffffffe
FS:  0000000000000000(0000) GS:ffff88808ca51000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055bff27cd348 CR3: 000000000e54c000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 btrfs_commit_transaction+0x29a/0x31a0 fs/btrfs/transaction.c:2254
 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
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x70f/0x23c0 kernel/exit.c:976
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1118
 __do_sys_exit_group kernel/exit.c:1129 [inline]
 __se_sys_exit_group kernel/exit.c:1127 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1127
 x64_sys_call+0x221a/0x2240 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd15c99c799
Code: Unable to access opcode bytes at 0x7fd15c99c76f.
RSP: 002b:00007ffd696491e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd15c99c799
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000003 R08: 0000000000000000 R09: 00007fd15cbe63e0
R10: 0000000000000006 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd15cbe63e0 R14: 0000000000000003 R15: 00007ffd696492a0
 </TASK>
----------------
Code disassembly (best guess):
   0:	85 e4                	test   %esp,%esp
   2:	75 07                	jne    0xb
   4:	e8 c3 66 e0 fd       	call   0xfde066cc
   9:	eb 7a                	jmp    0x85
   b:	e8 7c 6a c5 fd       	call   0xfdc56a8c
  10:	84 c0                	test   %al,%al
  12:	74 20                	je     0x34
  14:	e8 b3 66 e0 fd       	call   0xfde066cc
  19:	eb 6a                	jmp    0x85
  1b:	e8 ac 66 e0 fd       	call   0xfde066cc
  20:	48 8d 3d 45 8e 35 0c 	lea    0xc358e45(%rip),%rdi        # 0xc358e6c
  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 f3 6d cb 07       	call   0x7cb6e2c
  39:	41 89 c4             	mov    %eax,%r12d
  3c:	31 ff                	xor    %edi,%edi
  3e:	89 c6                	mov    %eax,%esi