syzbot


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: 975d, last: 7h23m
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 989d 1145d 22/29 fixed on 2023/06/08 14:41
linux-4.19 WARNING in nilfs_dat_commit_end -1 C error 4 993d 1145d 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 446d 975d 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 993d 1144d 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: 0 PID: 4373 at fs/nilfs2/dat.c:200 nilfs_dat_commit_end+0x5ac/0x6b0 fs/nilfs2/dat.c:200
Modules linked in:
CPU: 0 PID: 4373 Comm: segctord Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2025
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 a8 4c 03 00 e8 53 25 6f fe e8 ae db f7 fd e9 b8 fc ff ff e8 44 25 6f fe <0f> 0b e9 16 fc ff ff e8 38 25 6f fe e8 93 db f7 fd e9 74 fe ff ff
RSP: 0018:ffffc9000325f2f8 EFLAGS: 00010293
RAX: ffffffff83089edc RBX: ffff8880766981a0 RCX: ffff88802a3c1dc0
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000702
RBP: 0000000000000003 R08: dffffc0000000000 R09: ffffed100f37de9b
R10: ffffed100f37de9b R11: 1ffff1100f37de9a R12: ffff88802a3c3548
R13: ffff88807f6441a0 R14: 0000000000000702 R15: ffffc9000325f3f8
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fde841f5000 CR3: 0000000029fda000 CR4: 00000000003506f0
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+0x217/0x370 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+0x6ea/0x960 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+0x1cd3/0x6be0 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+0x50a/0x1120 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 (23908):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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
2025/11/18 22:04 linux-5.15.y cc5ec8769306 ef766cd7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/18 21:06 linux-5.15.y cc5ec8769306 ef766cd7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/18 02:46 linux-5.15.y cc5ec8769306 ef766cd7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/18 01:32 linux-5.15.y cc5ec8769306 ef766cd7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/17 13:45 linux-5.15.y cc5ec8769306 ef766cd7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/17 13:44 linux-5.15.y cc5ec8769306 ef766cd7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/17 12:25 linux-5.15.y cc5ec8769306 ef766cd7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/17 05:58 linux-5.15.y cc5ec8769306 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/17 00:18 linux-5.15.y cc5ec8769306 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/16 22:44 linux-5.15.y cc5ec8769306 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/16 22:44 linux-5.15.y cc5ec8769306 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/16 09:27 linux-5.15.y cc5ec8769306 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/16 09:25 linux-5.15.y cc5ec8769306 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/16 08:21 linux-5.15.y cc5ec8769306 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/15 19:28 linux-5.15.y cc5ec8769306 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/15 13:53 linux-5.15.y cc5ec8769306 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/15 12:25 linux-5.15.y cc5ec8769306 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/15 12:25 linux-5.15.y cc5ec8769306 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/15 06:27 linux-5.15.y cc5ec8769306 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/14 14:39 linux-5.15.y cc5ec8769306 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/14 12:54 linux-5.15.y cc5ec8769306 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/14 04:07 linux-5.15.y cc5ec8769306 07e030de .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/14 00:09 linux-5.15.y cc5ec8769306 07e030de .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/14 00:08 linux-5.15.y cc5ec8769306 07e030de .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/13 05:05 linux-5.15.y cc5ec8769306 07e030de .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/12 16:00 linux-5.15.y cc5ec8769306 07e030de .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/12 13:46 linux-5.15.y cc5ec8769306 07e030de .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/12 12:39 linux-5.15.y cc5ec8769306 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/12 10:31 linux-5.15.y cc5ec8769306 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/12 09:21 linux-5.15.y cc5ec8769306 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/12 06:47 linux-5.15.y cc5ec8769306 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/12 02:41 linux-5.15.y cc5ec8769306 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/11 06:36 linux-5.15.y cc5ec8769306 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/11 04:28 linux-5.15.y cc5ec8769306 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/10 13:32 linux-5.15.y cc5ec8769306 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/10 11:28 linux-5.15.y cc5ec8769306 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/10 09:36 linux-5.15.y cc5ec8769306 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/10 07:30 linux-5.15.y cc5ec8769306 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/10 02:06 linux-5.15.y cc5ec8769306 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/09 23:35 linux-5.15.y cc5ec8769306 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/09 21:25 linux-5.15.y cc5ec8769306 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/11/09 18:39 linux-5.15.y cc5ec8769306 4e1406b4 .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.