WARNING in csum_one_extent

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	WARNING in csum_one_extent_buffer btrfs	-1				2	1039d	1042d	0/29	auto-obsoleted due to no activity on 2023/06/03 17:56
		extent data offset 1044480 nr 4096 ram 1048576
	item 6 key (18446744073709551606 128 5484544) itemoff 186 itemsize 3424
BTRFS error (device loop1): block=6569984 write time tree block corruption detected
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4486 at fs/btrfs/disk-io.c:345 csum_one_extent_buffer+0x434/0x500 fs/btrfs/disk-io.c:344
Modules linked in:
CPU: 1 PID: 4486 Comm: syz.1.9 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:csum_one_extent_buffer+0x434/0x500 fs/btrfs/disk-io.c:344
Code: 4c 89 f9 4d 89 e0 e8 46 a4 a5 06 41 bd 8b ff ff ff 49 bc 00 00 00 00 00 fc ff df 4c 8b 7c 24 18 e9 e0 fe ff ff e8 4c 69 1f fe <0f> 0b e9 87 fe ff ff 44 89 f9 80 e1 07 38 c1 0f 8c 2a fd ff ff 4c
RSP: 0018:ffffc9000502e660 EFLAGS: 00010246
RAX: ffffffff83617684 RBX: fffffffffffffffa RCX: 0000000000080000
RDX: ffffc9000edc2000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc9000502e760 R08: dffffc0000000000 R09: fffff52000a05c39
R10: fffff52000a05c39 R11: 1ffff92000a05c38 R12: dffffc0000000000
R13: 00000000ffffff8b R14: ffff88807556805f R15: ffff88807929bc40
FS:  00007fceceaab6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056535b337950 CR3: 0000000078378000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 csum_dirty_buffer fs/btrfs/disk-io.c:423 [inline]
 btree_csum_one_bio+0x6da/0xa60 fs/btrfs/disk-io.c:720
 btrfs_submit_metadata_bio+0x3e7/0x510 fs/btrfs/disk-io.c:771
 submit_one_bio+0x202/0x3b0 fs/btrfs/extent_io.c:133
 submit_write_bio fs/btrfs/extent_io.c:160 [inline]
 btree_write_cache_pages+0x15f3/0x1770 fs/btrfs/extent_io.c:3074
 do_writepages+0x3b7/0x610 mm/page-writeback.c:2491
 filemap_fdatawrite_wbc+0x11e/0x180 mm/filemap.c:388
 __filemap_fdatawrite_range mm/filemap.c:421 [inline]
 filemap_fdatawrite_range+0xca/0x120 mm/filemap.c:439
 btrfs_write_marked_extents+0x1c3/0x320 fs/btrfs/transaction.c:1100
 btrfs_sync_log+0x8da/0x2750 fs/btrfs/tree-log.c:2988
 btrfs_sync_file+0xca1/0x11a0 fs/btrfs/file.c:1974
 generic_write_sync include/linux/fs.h:2962 [inline]
 iomap_dio_complete+0x5c8/0x750 fs/iomap/direct-io.c:122
 btrfs_direct_write fs/btrfs/file.c:1545 [inline]
 btrfs_do_write_iter+0xfd2/0x14e0 fs/btrfs/file.c:1681
 do_iter_readv_writev fs/read_write.c:-1 [inline]
 do_iter_write+0x62d/0xaf0 fs/read_write.c:861
 iter_file_splice_write+0x665/0xc50 fs/splice.c:685
 do_splice_from fs/splice.c:763 [inline]
 direct_splice_actor+0xe1/0x130 fs/splice.c:950
 splice_direct_to_actor+0x480/0xb60 fs/splice.c:896
 do_splice_direct+0x1b0/0x2b0 fs/splice.c:1002
 do_sendfile+0x5cc/0xeb0 fs/read_write.c:1255
 __do_sys_sendfile64 fs/read_write.c:1323 [inline]
 __se_sys_sendfile64+0x13b/0x190 fs/read_write.c:1309
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fcecdb8f749
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:00007fceceaab038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fcecdde6090 RCX: 00007fcecdb8f749
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000007
RBP: 00007fcecdc13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 000000007fffeffd R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcecdde6128 R14: 00007fcecdde6090 R15: 00007ffeaaf30ef8
 </TASK>