loop0: detected capacity change from 0 to 32768
BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 (7:0) scanned by syz.0.0 (5337)
BTRFS info (device loop0): first mount of filesystem c9fe44da-de57-406a-8241-57ec7d4412cf
BTRFS info (device loop0): using crc32c (crc32c-lib) checksum algorithm
BTRFS info (device loop0): rebuilding free space tree
BTRFS info (device loop0): allowing degraded mounts
BTRFS info (device loop0): enabling ssd optimizations
BTRFS info (device loop0): enabling free space tree
BTRFS info (device loop0): force clearing of disk cache
BTRFS info (device loop0): use zstd compression, level 3
BTRFS info (device loop0): max_inline set to 0
------------[ cut here ]------------
BTRFS: Transaction aborted (error -28)
WARNING: fs/btrfs/extent-tree.c:3235 at __btrfs_free_extent+0x1d81/0x3f40 fs/btrfs/extent-tree.c:3235, CPU#0: syz.0.0/5337
Modules linked in:
CPU: 0 UID: 0 PID: 5337 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~bpo12+1 04/01/2014
RIP: 0010:__btrfs_free_extent+0x1d84/0x3f40 fs/btrfs/extent-tree.c:3235
Code: ae 0b 00 00 e8 9d f3 d9 fd 84 c0 0f 84 99 02 00 00 e8 20 fe f3 fd e9 97 0b 00 00 e8 16 fe f3 fd 48 8d 3d df 09 be 0b 44 89 e6 <67> 48 0f b9 3a e9 87 e9 ff ff e8 2d 9d 8e 07 89 c3 31 ff 89 c6 e8
RSP: 0018:ffffc9000dba6be0 EFLAGS: 00010246
RAX: ffffffff83cd094a RBX: 0000000000000000 RCX: 0000000000100000
RDX: ffffc90020491000 RSI: 00000000ffffffe4 RDI: ffffffff8f8b1330
RBP: ffffc9000dba6d90 R08: ffff888035fb24c0 R09: 0000000000000003
R10: 00000000fffffffb R11: 0000000000000002 R12: 00000000ffffffe4
R13: dffffc0000000000 R14: 00000000ffffffe4 R15: ffff888000c1c001
FS:  00007fe9a62126c0(0000) GS:ffff88808d414000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe9a54d45d8 CR3: 0000000041be5000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 run_one_delayed_ref fs/btrfs/extent-tree.c:-1 [inline]
 btrfs_run_delayed_refs_for_head fs/btrfs/extent-tree.c:1973 [inline]
 __btrfs_run_delayed_refs+0xe6a/0x3af0 fs/btrfs/extent-tree.c:2048
 btrfs_run_delayed_refs+0xe6/0x3a0 fs/btrfs/extent-tree.c:2160
 btrfs_commit_transaction+0x28b/0x3b10 fs/btrfs/transaction.c:2229
 btrfs_sync_file+0xd20/0x1140 fs/btrfs/file.c:1819
 generic_write_sync include/linux/fs.h:2616 [inline]
 btrfs_do_write_iter+0x689/0x820 fs/btrfs/file.c:1470
 iter_file_splice_write+0x972/0x10b0 fs/splice.c:738
 do_splice_from fs/splice.c:938 [inline]
 direct_splice_actor+0x101/0x160 fs/splice.c:1161
 splice_direct_to_actor+0x5a8/0xcc0 fs/splice.c:1105
 do_splice_direct_actor fs/splice.c:1204 [inline]
 do_splice_direct+0x181/0x270 fs/splice.c:1230
 do_sendfile+0x4da/0x7e0 fs/read_write.c:1370
 __do_sys_sendfile64 fs/read_write.c:1431 [inline]
 __se_sys_sendfile64+0x13e/0x190 fs/read_write.c:1417
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe9a538f7c9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe9a6212038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fe9a55e5fa0 RCX: 00007fe9a538f7c9
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 0000000000000009
RBP: 00007fe9a5413f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000800000009 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe9a55e6038 R14: 00007fe9a55e5fa0 R15: 00007fffbfa98798
 </TASK>
----------------
Code disassembly (best guess):
   0:	ae                   	scas   %es:(%rdi),%al
   1:	0b 00                	or     (%rax),%eax
   3:	00 e8                	add    %ch,%al
   5:	9d                   	popf
   6:	f3 d9 fd             	repz fscale
   9:	84 c0                	test   %al,%al
   b:	0f 84 99 02 00 00    	je     0x2aa
  11:	e8 20 fe f3 fd       	call   0xfdf3fe36
  16:	e9 97 0b 00 00       	jmp    0xbb2
  1b:	e8 16 fe f3 fd       	call   0xfdf3fe36
  20:	48 8d 3d df 09 be 0b 	lea    0xbbe09df(%rip),%rdi        # 0xbbe0a06
  27:	44 89 e6             	mov    %r12d,%esi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	e9 87 e9 ff ff       	jmp    0xffffe9bb
  34:	e8 2d 9d 8e 07       	call   0x78e9d66
  39:	89 c3                	mov    %eax,%ebx
  3b:	31 ff                	xor    %edi,%edi
  3d:	89 c6                	mov    %eax,%esi
  3f:	e8                   	.byte 0xe8