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BTRFS: Transaction aborted (error -28)
WARNING: fs/btrfs/block-group.c:4012 at do_chunk_alloc fs/btrfs/block-group.c:4012 [inline], CPU#0: syz.0.0/5329
WARNING: fs/btrfs/block-group.c:4012 at btrfs_chunk_alloc+0x101d/0x15d0 fs/btrfs/block-group.c:4253, CPU#0: syz.0.0/5329
Modules linked in:
CPU: 0 UID: 0 PID: 5329 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:do_chunk_alloc fs/btrfs/block-group.c:4012 [inline]
RIP: 0010:btrfs_chunk_alloc+0x101f/0x15d0 fs/btrfs/block-group.c:4253
Code: 67 19 bd fd e9 6d 01 00 00 e8 0d 3d a2 fd 84 c0 74 22 e8 54 19 bd fd e9 5a 01 00 00 e8 4a 19 bd fd 48 8d 3d f3 53 f1 0b 89 de <67> 48 0f b9 3a e9 b3 fc ff ff e8 d2 a6 91 07 41 89 c6 31 ff 89 c6
RSP: 0018:ffffc9000ebcf3d8 EFLAGS: 00010287
RAX: ffffffff84076da6 RBX: ffffffffffffffe4 RCX: 0000000000100000
RDX: ffffc900202a1000 RSI: 00000000ffffffe4 RDI: ffffffff8ff8c1a0
RBP: 0000000000000000 R08: ffff888000cd0000 R09: 0000000000000003
R10: 00000000fffffffb R11: 0000000000000002 R12: 1ffff110083e6216
R13: ffff88801c8cf500 R14: ffff8880434d4001 R15: ffff888012952800
FS:  00007f05e25746c0(0000) GS:ffff88808ccea000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd3cb8eb000 CR3: 00000000413a5000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 find_free_extent_update_loop fs/btrfs/extent-tree.c:4199 [inline]
 find_free_extent+0x45c3/0x5d00 fs/btrfs/extent-tree.c:4611
 btrfs_reserve_extent+0x30e/0x7f0 fs/btrfs/extent-tree.c:4705
 __btrfs_prealloc_file_range+0x2c1/0xd90 fs/btrfs/inode.c:9141
 btrfs_prealloc_file_range+0x40/0x60 fs/btrfs/inode.c:9234
 btrfs_fallocate+0x14ba/0x1c40 fs/btrfs/file.c:3250
 vfs_fallocate+0x669/0x7e0 fs/open.c:339
 ksys_fallocate fs/open.c:363 [inline]
 __do_sys_fallocate fs/open.c:368 [inline]
 __se_sys_fallocate fs/open.c:366 [inline]
 __x64_sys_fallocate+0xc0/0x110 fs/open.c:366
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f05e179aeb9
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:00007f05e2574028 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f05e1a16090 RCX: 00007f05e179aeb9
RDX: 0000000000000007 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 00007f05e1808c1f R08: 0000000000000000 R09: 0000000000000000
R10: 00000000000000f4 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f05e1a16128 R14: 00007f05e1a16090 R15: 00007ffd3df99ed8
 </TASK>
----------------
Code disassembly (best guess):
   0:	67 19 bd fd e9 6d 01 	sbb    %edi,0x16de9fd(%ebp)
   7:	00 00                	add    %al,(%rax)
   9:	e8 0d 3d a2 fd       	call   0xfda23d1b
   e:	84 c0                	test   %al,%al
  10:	74 22                	je     0x34
  12:	e8 54 19 bd fd       	call   0xfdbd196b
  17:	e9 5a 01 00 00       	jmp    0x176
  1c:	e8 4a 19 bd fd       	call   0xfdbd196b
  21:	48 8d 3d f3 53 f1 0b 	lea    0xbf153f3(%rip),%rdi        # 0xbf1541b
  28:	89 de                	mov    %ebx,%esi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	e9 b3 fc ff ff       	jmp    0xfffffce7
  34:	e8 d2 a6 91 07       	call   0x791a70b
  39:	41 89 c6             	mov    %eax,%r14d
  3c:	31 ff                	xor    %edi,%edi
  3e:	89 c6                	mov    %eax,%esi