BTRFS info (device loop4): turning on async discard
BTRFS info (device loop4): enabling free space tree
BTRFS info (device loop4): force clearing of disk cache
BTRFS info (device loop4): trying to use backup root at mount time
BTRFS critical (device loop4): panic in insert_ordered_extent:261: overlapping ordered extents, existing oe file_offset 4096 num_bytes 1044480 flags 0x1089, new oe file_offset 4096 num_bytes 1044480 flags 0x80 (errno=-17 Object already exists)
------------[ cut here ]------------
kernel BUG at fs/btrfs/ordered-data.c:261!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 8640 Comm: syz.4.710 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:insert_ordered_extent fs/btrfs/ordered-data.c:261 [inline]
RIP: 0010:btrfs_alloc_ordered_extent.cold+0xab/0x111 fs/btrfs/ordered-data.c:336
Code: d2 28 8c b9 ef ff ff ff 41 56 ba 05 01 00 00 48 c7 c6 e0 da 28 8c 41 54 ff b3 70 ff ff ff 50 48 8b 7c 24 38 e8 6f 22 02 00 90 <0f> 0b e8 27 26 da 00 49 89 d8 b9 32 01 00 00 48 c7 c2 40 cd 28 8c
RSP: 0018:ffffc90003996978 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888026259d90 RCX: 0000000000000000
RDX: fffff52000732d0d RSI: ffffffff8e17f3e4 RDI: fffff52000732d1d
RBP: 0000000000000080 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000100000 R11: 0000000000000000 R12: 0000000000001000
R13: 0000000000001000 R14: 00000000000ff000 R15: dffffc0000000000
FS:  00007fc7b546f6c0(0000) GS:ffff888123def000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000ff000 CR3: 0000000053fd0000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 cow_one_range fs/btrfs/inode.c:1241 [inline]
 cow_file_range+0x593/0x10f0 fs/btrfs/inode.c:1403
 fallback_to_cow+0x53d/0xad0 fs/btrfs/inode.c:1751
 run_delalloc_nocow+0x861/0x1420 fs/btrfs/inode.c:2181
 btrfs_run_delalloc_range+0x1320/0x1c40 fs/btrfs/inode.c:2419
 writepage_delalloc+0xb6e/0x19e0 fs/btrfs/extent_io.c:1671
 extent_writepage fs/btrfs/extent_io.c:2043 [inline]
 extent_write_cache_pages+0xfaf/0x2a50 fs/btrfs/extent_io.c:2706
 btrfs_writepages+0x209/0x500 fs/btrfs/extent_io.c:2838
 do_writepages+0x278/0x600 mm/page-writeback.c:2571
 filemap_writeback+0x22d/0x2e0 mm/filemap.c:387
 btrfs_fdatawrite_range+0x53/0xf0 fs/btrfs/file.c:3884
 btrfs_direct_write+0x335/0xd10 fs/btrfs/direct-io.c:1038
 btrfs_do_write_iter+0x6b8/0x8f0 fs/btrfs/file.c:1449
 aio_write+0x3ba/0x920 fs/aio.c:1687
 __io_submit_one fs/aio.c:2059 [inline]
 io_submit_one+0x1142/0x1fb0 fs/aio.c:2106
 __do_sys_io_submit fs/aio.c:2165 [inline]
 __se_sys_io_submit fs/aio.c:2135 [inline]
 __x64_sys_io_submit+0x1b1/0x3a0 fs/aio.c:2135
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc7b459e0d9
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:00007fc7b546f028 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1
RAX: ffffffffffffffda RBX: 00007fc7b4825fa0 RCX: 00007fc7b459e0d9
RDX: 0000200000000540 RSI: 000000000000003b RDI: 00007fc7b5446000
RBP: 00007fc7b4635024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc7b4826038 R14: 00007fc7b4825fa0 R15: 00007ffcae17fa28
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:insert_ordered_extent fs/btrfs/ordered-data.c:261 [inline]
RIP: 0010:btrfs_alloc_ordered_extent.cold+0xab/0x111 fs/btrfs/ordered-data.c:336
Code: d2 28 8c b9 ef ff ff ff 41 56 ba 05 01 00 00 48 c7 c6 e0 da 28 8c 41 54 ff b3 70 ff ff ff 50 48 8b 7c 24 38 e8 6f 22 02 00 90 <0f> 0b e8 27 26 da 00 49 89 d8 b9 32 01 00 00 48 c7 c2 40 cd 28 8c
RSP: 0018:ffffc90003996978 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888026259d90 RCX: 0000000000000000
RDX: fffff52000732d0d RSI: ffffffff8e17f3e4 RDI: fffff52000732d1d
RBP: 0000000000000080 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000100000 R11: 0000000000000000 R12: 0000000000001000
R13: 0000000000001000 R14: 00000000000ff000 R15: dffffc0000000000
FS:  00007fc7b546f6c0(0000) GS:ffff888123def000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000ff000 CR3: 0000000053fd0000 CR4: 0000000000350ef0