------------[ cut here ]------------ BTRFS: Transaction aborted (error -28) WARNING: fs/btrfs/inode.c:3301 at btrfs_finish_one_ordered+0x21ea/0x2650 fs/btrfs/inode.c:3301, CPU#1: kworker/u32:7/563 Modules linked in: CPU: 1 UID: 0 PID: 563 Comm: kworker/u32:7 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 Workqueue: btrfs-endio-write btrfs_work_helper RIP: 0010:btrfs_finish_one_ordered+0x21ed/0x2650 fs/btrfs/inode.c:3301 Code: d3 fd 48 8d 3d 84 92 ad 0c 44 89 fe 67 48 0f b9 3a c6 44 24 57 01 e9 6c a6 fa fc e8 9d ec d3 fd 48 8d 3d 76 92 ad 0c 44 89 fe <67> 48 0f b9 3a c6 44 24 57 01 e9 95 a8 fa fc e8 7f ec d3 fd 48 8d RSP: 0018:ffffc9000356fa38 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff88802ef1b6a0 RCX: ffffffff8434f0bf RDX: ffff888027450000 RSI: 00000000ffffffe4 RDI: ffffffff90e285e0 RBP: ffff888040e15c20 R08: 0000000000000005 R09: fffffffffffffffb R10: ffffffffffffffe4 R11: 000000000000761b R12: ffff8880256a5c00 R13: ffff88802ef1b6e0 R14: ffff888040e15bc0 R15: 00000000ffffffe4 FS: 0000000000000000(0000) GS:ffff8880d643f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5711b1cf90 CR3: 000000002f6bf000 CR4: 0000000000352ef0 Call Trace: btrfs_work_helper+0x214/0xcd0 fs/btrfs/async-thread.c:312 process_one_work+0xa23/0x19a0 kernel/workqueue.c:3276 process_scheduled_works kernel/workqueue.c:3359 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3440 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x754/0xd80 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 ---------------- Code disassembly (best guess): 0: d3 fd sar %cl,%ebp 2: 48 8d 3d 84 92 ad 0c lea 0xcad9284(%rip),%rdi # 0xcad928d 9: 44 89 fe mov %r15d,%esi c: 67 48 0f b9 3a ud1 (%edx),%rdi 11: c6 44 24 57 01 movb $0x1,0x57(%rsp) 16: e9 6c a6 fa fc jmp 0xfcfaa687 1b: e8 9d ec d3 fd call 0xfdd3ecbd 20: 48 8d 3d 76 92 ad 0c lea 0xcad9276(%rip),%rdi # 0xcad929d 27: 44 89 fe mov %r15d,%esi * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: c6 44 24 57 01 movb $0x1,0x57(%rsp) 34: e9 95 a8 fa fc jmp 0xfcfaa8ce 39: e8 7f ec d3 fd call 0xfdd3ecbd 3e: 48 rex.W 3f: 8d .byte 0x8d