syzbot


WARNING in errseq_set (2)

Status: upstream: reported C repro on 2025/01/10 12:04
Subsystems: ntfs3
[Documentation on labels]
Reported-by: syzbot+57f9327d593d301ce2a2@syzkaller.appspotmail.com
First crash: 431d, last: 45d
Cause bisection: failed (error log, bisect log)
  
Fix bisection: failed (error log, bisect log)
  
Discussions (2)
Title Replies (including bot) Last reply
[syzbot] Monthly ntfs3 report (Jan 2026) 0 (1) 2026/01/28 22:39
[syzbot] [ntfs3?] WARNING in errseq_set (2) 0 (2) 2025/05/08 03:20
Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in errseq_set ntfs3 -1 33 581d 1069d 0/29 auto-obsoleted due to no activity on 2024/11/17 16:16
Last patch testing requests (7)
Created Duration User Patch Repo Result
2026/02/10 17:48 23m retest repro upstream OK log
2025/11/10 04:52 16m retest repro upstream report log
2025/08/31 04:59 13m retest repro upstream report log
2025/06/14 23:20 23m retest repro upstream OK log
2025/05/31 17:18 14m retest repro upstream report log
2025/03/31 18:43 56m retest repro upstream report log
2025/01/20 12:34 21m retest repro upstream report log

Sample crash report:
------------[ cut here ]------------
err = 556
WARNING: CPU: 0 PID: 6752 at lib/errseq.c:76 errseq_set+0xed/0x120 lib/errseq.c:75
Modules linked in:
CPU: 0 UID: 0 PID: 6752 Comm: syz.2.114 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:errseq_set+0xed/0x120 lib/errseq.c:75
Code: 5b 41 5c 41 5e 41 5f 5d c3 cc cc cc cc cc e8 ba 56 06 fd eb e9 e8 b3 56 06 fd 90 48 c7 c7 60 94 61 8b 89 de e8 74 27 cb fc 90 <0f> 0b 90 90 eb ce 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 2f ff ff
RSP: 0018:ffffc90005e87450 EFLAGS: 00010246
RAX: 97c45caf5dc88600 RBX: 000000000000022c RCX: 0000000000080000
RDX: ffffc9000e455000 RSI: 0000000000000306 RDI: 0000000000000307
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1017104863 R12: ffff88805f6e64c0
R13: dffffc0000000000 R14: ffff88805f6e6a98 R15: ffff88805f6e6558
FS:  00007f68f2db56c0(0000) GS:ffff8881268bc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5ff1939000 CR3: 00000000257cc000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __filemap_set_wb_err+0x22/0x1e0 mm/filemap.c:711
 mapping_set_error include/linux/pagemap.h:245 [inline]
 ntfs_resident_writepage+0x14e/0x260 fs/ntfs3/inode.c:894
 write_cache_pages+0x61/0x100 mm/page-writeback.c:2612
 do_writepages+0x32b/0x550 mm/page-writeback.c:2634
 filemap_fdatawrite_wbc mm/filemap.c:386 [inline]
 __filemap_fdatawrite_range mm/filemap.c:419 [inline]
 filemap_write_and_wait_range+0x222/0x320 mm/filemap.c:691
 kiocb_write_and_wait mm/filemap.c:2802 [inline]
 generic_file_read_iter+0x1a2/0x520 mm/filemap.c:2876
 copy_splice_read+0x5da/0xa60 fs/splice.c:363
 do_splice_read fs/splice.c:981 [inline]
 splice_direct_to_actor+0x4db/0xcd0 fs/splice.c:1086
 do_splice_direct_actor fs/splice.c:1204 [inline]
 do_splice_direct+0x187/0x270 fs/splice.c:1230
 do_sendfile+0x4ec/0x7f0 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+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f68f4b6eec9
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:00007f68f2db5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f68f4dc6090 RCX: 00007f68f4b6eec9
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000005
RBP: 00007f68f4bf1f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020fffe82 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f68f4dc6128 R14: 00007f68f4dc6090 R15: 00007ffc5a7d3de8
 </TASK>

Crashes (15):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/09/25 16:43 upstream bf40f4b87761 0abd0691 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in errseq_set
2025/06/27 11:33 upstream f02769e7f272 803ce19b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in errseq_set
2025/05/17 17:16 upstream 172a9d94339c f41472b0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in errseq_set
2025/05/08 03:19 upstream 707df3375124 dbf35fa1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs WARNING in errseq_set
2025/05/08 01:09 upstream 707df3375124 dbf35fa1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in errseq_set
2025/01/06 11:58 upstream ab75170520d4 f3558dbf .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] [mounted in repro #3] [mounted in repro #4] ci-upstream-kasan-gce-root WARNING in errseq_set
2026/01/27 11:05 upstream fcb70a56f4d8 43e1df1d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in errseq_set
2026/01/19 07:10 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in errseq_set
2026/01/16 19:55 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in errseq_set
2025/08/10 23:51 upstream 2b38afce25c4 32a0e5ed .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in errseq_set
2025/03/11 14:34 upstream 4d872d51bc9d 16256247 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in errseq_set
2026/01/12 12:48 linux-next f417b7ffcbef d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in errseq_set
2025/12/24 21:55 linux-next cc3aa43b44bd d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in errseq_set
2025/04/01 14:21 linux-next 7b7d0894c661 36d76a97 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in errseq_set
2025/02/17 21:34 linux-next 253c82b3a2ce 9be4ace3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in errseq_set
* Struck through repros no longer work on HEAD.