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WARNING in nilfs_dat_commit_end

Status: upstream: reported C repro on 2023/03/19 13:38
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+f95e0d2bc2dc67bc22bb@syzkaller.appspotmail.com
First crash: 1146d, last: 2h09m
Fix commit to backport (bisect log) :
tree: upstream
commit 28a65b49eb53e172d23567005465019658bfdb4d
Author: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Date: Thu Apr 27 01:15:26 2023 +0000

  nilfs2: do not write dirty data after degenerating to read-only

[report pending]
  
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2023/05/10 linux-5.15.y (ToT) 8a7f2a5c5aa1 C [report] WARNING in nilfs_dat_commit_end
2023/05/10 upstream (ToT) ad2fd53a7870 C Didn't crash
▶ ▼ Similar bugs (4)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in nilfs_dat_commit_end nilfs -1 C error 267 1159d 1315d 22/29 fixed on 2023/06/08 14:41
linux-4.19 WARNING in nilfs_dat_commit_end -1 C error 4 1163d 1316d 0/1 upstream: reported C repro on 2022/09/30 13:59
linux-6.1 WARNING in nilfs_dat_commit_end origin:lts-only -1 C done 3102 616d 1145d 0/3 upstream: reported C repro on 2023/03/19 21:57
linux-4.14 WARNING in nilfs_dat_commit_end nilfs2 -1 C 6 1163d 1314d 0/1 upstream: reported C repro on 2022/10/01 18:00
▶ ▼ Fix bisection attempts (1)
Created Duration User Patch Repo Result
2023/09/02 11:18 3h57m fix candidate upstream OK (1) job log

Sample crash report:
NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4335 at fs/nilfs2/dat.c:200 nilfs_dat_commit_end+0x5ac/0x6b0 fs/nilfs2/dat.c:200
Modules linked in:
CPU: 1 PID: 4335 Comm: segctord Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:nilfs_dat_commit_end+0x5ac/0x6b0 fs/nilfs2/dat.c:200
Code: 8b 34 24 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d e9 b8 54 03 00 e8 73 5a 6a fe e8 7e b6 f1 fd e9 b8 fc ff ff e8 64 5a 6a fe <0f> 0b e9 16 fc ff ff e8 58 5a 6a fe e8 63 b6 f1 fd e9 74 fe ff ff
RSP: 0018:ffffc900031df2f8 EFLAGS: 00010293
RAX: ffffffff830ec6ac RBX: ffff88807de261a0 RCX: ffff888025ef1dc0
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000ffffffff0002
RBP: 0000000000000003 R08: ffff888076855cd3 R09: 1ffff1100ed0ab9a
R10: dffffc0000000000 R11: ffffed100ed0ab9b R12: ffff888025ef3548
R13: ffff888021019180 R14: 0000ffffffff0002 R15: ffffc900031df3f8
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055976f800e20 CR3: 000000007a70b000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 nilfs_dat_commit_update+0x24/0x40 fs/nilfs2/dat.c:250
 nilfs_direct_propagate+0x22e/0x3a0 fs/nilfs2/direct.c:285
 nilfs_bmap_propagate+0x70/0x120 fs/nilfs2/bmap.c:345
 nilfs_collect_file_data+0x4b/0xc0 fs/nilfs2/segment.c:587
 nilfs_segctor_apply_buffers+0x15d/0x320 fs/nilfs2/segment.c:1049
 nilfs_segctor_scan_file+0x73a/0x9d0 fs/nilfs2/segment.c:1098
 nilfs_segctor_collect_blocks fs/nilfs2/segment.c:1228 [inline]
 nilfs_segctor_collect fs/nilfs2/segment.c:1534 [inline]
 nilfs_segctor_do_construct+0x1cef/0x6ca0 fs/nilfs2/segment.c:2090
 nilfs_segctor_construct+0x17b/0x690 fs/nilfs2/segment.c:2455
 nilfs_segctor_thread_construct fs/nilfs2/segment.c:2563 [inline]
 nilfs_segctor_thread+0x523/0x1180 fs/nilfs2/segment.c:2647
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>

Crashes (28023):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/04/04 21:51 linux-5.15.y 91d48252ad4b 4440e7c2 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/12/25 19:34 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/12/25 19:04 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/27 13:40 linux-5.15.y c79648372d02 e12e5ba4 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/06/08 11:36 linux-5.15.y 1c700860e8bc 4826c28e .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/06/06 23:46 linux-5.15.y 1c700860e8bc 9fa58bba .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2024/08/11 22:43 linux-5.15.y 7e89efd3ae1c 6f4edef4 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2024/08/04 14:36 linux-5.15.y 7e89efd3ae1c 1786a2a8 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2023/09/01 03:23 linux-5.15.y 9e43368a3393 696ea0d2 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2023/03/23 16:08 linux-5.15.y 115472395b0a f94b4a29 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/05/30 08:14 linux-5.15.y 98f47d0e9b8c 3d2f584d .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING in nilfs_dat_commit_end
2025/02/19 07:39 linux-5.15.y c16c81c81336 9a14138f .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING in nilfs_dat_commit_end
2024/11/10 21:18 linux-5.15.y 3c17fc483905 6b856513 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING in nilfs_dat_commit_end
2024/09/27 08:12 linux-5.15.y 3a5928702e71 9314348a .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING in nilfs_dat_commit_end
2024/06/22 09:58 linux-5.15.y 4878aadf2d15 edc5149a .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING in nilfs_dat_commit_end
2024/05/12 17:50 linux-5.15.y 284087d4f7d5 9026e142 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING in nilfs_dat_commit_end
2024/02/13 21:26 linux-5.15.y 6139f2a02fe0 e66542d7 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING in nilfs_dat_commit_end
2023/11/05 13:39 linux-5.15.y 12952a23a5da 500bfdc4 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING in nilfs_dat_commit_end
2023/05/15 00:49 linux-5.15.y b0ece631f84a 2b9ba477 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2023/05/15 00:28 linux-5.15.y b0ece631f84a 2b9ba477 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/08 14:21 linux-5.15.y 7e75ef31ddc9 b2988c17 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/08 14:21 linux-5.15.y 7e75ef31ddc9 b2988c17 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/08 03:37 linux-5.15.y ef251c45f1cd 5633175a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/08 01:55 linux-5.15.y ef251c45f1cd 5633175a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/07 15:02 linux-5.15.y ef251c45f1cd cbf9e0fc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/07 13:45 linux-5.15.y ef251c45f1cd cbf9e0fc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/07 13:28 linux-5.15.y ef251c45f1cd cbf9e0fc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/07 02:31 linux-5.15.y ef251c45f1cd f250db59 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/07 00:49 linux-5.15.y ef251c45f1cd f250db59 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/06 15:22 linux-5.15.y ef251c45f1cd 1dddfd3d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/06 12:48 linux-5.15.y ef251c45f1cd 1dddfd3d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/06 12:46 linux-5.15.y ef251c45f1cd 1dddfd3d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/06 02:06 linux-5.15.y ef251c45f1cd 26da2c66 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/05 22:38 linux-5.15.y ef251c45f1cd 26da2c66 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/05 18:56 linux-5.15.y ef251c45f1cd 06e69a27 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/05 16:41 linux-5.15.y ef251c45f1cd 06e69a27 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/05 16:41 linux-5.15.y ef251c45f1cd 06e69a27 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/05 12:58 linux-5.15.y ef251c45f1cd 06e69a27 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/05 11:24 linux-5.15.y ef251c45f1cd 06e69a27 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/05 02:40 linux-5.15.y ef251c45f1cd a898ba9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/04 21:53 linux-5.15.y ef251c45f1cd a898ba9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/04 21:53 linux-5.15.y ef251c45f1cd a898ba9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/04 09:21 linux-5.15.y ef251c45f1cd 85f1bcf2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/04 04:14 linux-5.15.y ef251c45f1cd a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/04 03:08 linux-5.15.y ef251c45f1cd a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/04 00:30 linux-5.15.y ef251c45f1cd a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/03 11:54 linux-5.15.y ef251c45f1cd a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/03 07:20 linux-5.15.y ef251c45f1cd a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/02 22:24 linux-5.15.y ef251c45f1cd a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/02 09:12 linux-5.15.y ef251c45f1cd a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/02 09:07 linux-5.15.y ef251c45f1cd a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/05/01 03:33 linux-5.15.y ef251c45f1cd 753c55b9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/04/30 16:05 linux-5.15.y ef251c45f1cd a7464baf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/04/30 13:23 linux-5.15.y ef251c45f1cd a7464baf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/04/30 13:21 linux-5.15.y ef251c45f1cd a7464baf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/04/30 11:00 linux-5.15.y b9d57c40a767 005438fc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/04/30 07:16 linux-5.15.y b9d57c40a767 005438fc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/04/29 22:10 linux-5.15.y b9d57c40a767 005438fc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/04/29 10:22 linux-5.15.y b9d57c40a767 7ca9e4d8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/04/28 21:47 linux-5.15.y b9d57c40a767 95008c03 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/04/28 21:43 linux-5.15.y b9d57c40a767 95008c03 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2026/04/28 09:36 linux-5.15.y b9d57c40a767 ce741359 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/28 01:41 linux-5.15.y c79648372d02 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in nilfs_dat_commit_end
2023/03/19 13:38 linux-5.15.y 8020ae3c051d 7939252e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
* Struck through repros no longer work on HEAD.