------------[ cut here ]------------
WARNING: CPU: 0 PID: 5317 at fs/bcachefs/fs-io-buffered.c:419 bch2_writepage_io_done+0x8ca/0x970 fs/bcachefs/fs-io-buffered.c:419
Modules linked in:
CPU: 0 UID: 0 PID: 5317 Comm: syz.0.0 Not tainted 6.13.0-rc5-syzkaller-00004-gccb98ccef0e5 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:bch2_writepage_io_done+0x8ca/0x970 fs/bcachefs/fs-io-buffered.c:419
Code: 00 00 00 48 3b 84 24 e0 00 00 00 0f 85 ac 00 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 67 b1 66 fd 90 <0f> 0b 90 42 80 3c 3b 00 74 08 4c 89 f7 e8 24 19 cd fd 4d 8b 26 e9
RSP: 0018:ffffc9000d4bf180 EFLAGS: 00010287
RAX: ffffffff8438c279 RBX: 1ffff1100a8203bb RCX: 0000000000100000
RDX: ffffc9000ef5b000 RSI: 00000000000082b7 RDI: 00000000000082b8
RBP: ffffc9000d4bf2b0 R08: ffffffff8438c0a5 R09: 1ffff1100a51a280
R10: dffffc0000000000 R11: ffffed100a51a281 R12: 0000000000000008
R13: ffffc9000d4bf200 R14: ffff888054101dd8 R15: dffffc0000000000
FS:  00007f65e01a86c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002001e000 CR3: 0000000033358000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bch2_write_data_inline fs/bcachefs/io_write.c:1558 [inline]
 bch2_write+0x1022/0x1760 fs/bcachefs/io_write.c:1627
 closure_queue include/linux/closure.h:270 [inline]
 closure_call include/linux/closure.h:432 [inline]
 bch2_writepage_do_io fs/bcachefs/fs-io-buffered.c:449 [inline]
 bch2_writepages+0x284/0x390 fs/bcachefs/fs-io-buffered.c:641
 do_writepages+0x35f/0x880 mm/page-writeback.c:2702
 filemap_fdatawrite_wbc mm/filemap.c:397 [inline]
 __filemap_fdatawrite_range mm/filemap.c:430 [inline]
 filemap_write_and_wait_range+0x283/0x3a0 mm/filemap.c:684
 bchfs_truncate+0x78d/0xc90
 notify_change+0xbca/0xe90 fs/attr.c:552
 do_truncate+0x220/0x310 fs/open.c:65
 vfs_truncate+0x2e1/0x3b0 fs/open.c:111
 do_sys_truncate+0xdb/0x190 fs/open.c:134
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f65df385d29
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:00007f65e01a8038 EFLAGS: 00000246 ORIG_RAX: 000000000000004c
RAX: ffffffffffffffda RBX: 00007f65df576080 RCX: 00007f65df385d29
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000020000280
RBP: 00007f65df401b08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f65df576080 R15: 00007ffd25ae7128
 </TASK>