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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: 894d, last: 5h27m
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 907d 1064d 22/29 fixed on 2023/06/08 14:41
linux-4.19 WARNING in nilfs_dat_commit_end -1 C error 4 912d 1064d 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 365d 894d 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 912d 1063d 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 (22450):
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
2025/08/29 23:46 linux-5.15.y 01879f56bdde 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/29 22:44 linux-5.15.y 01879f56bdde 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/29 22:44 linux-5.15.y 01879f56bdde 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/29 20:13 linux-5.15.y 01879f56bdde 3e1beec6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/29 10:37 linux-5.15.y 01879f56bdde 3e1beec6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/29 09:36 linux-5.15.y 01879f56bdde 3e1beec6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/29 09:34 linux-5.15.y 01879f56bdde 3e1beec6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/28 20:21 linux-5.15.y 01879f56bdde d401b9d7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/28 16:29 linux-5.15.y 01879f56bdde e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/28 16:28 linux-5.15.y 01879f56bdde e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/28 15:23 linux-5.15.y 01879f56bdde e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/28 05:51 linux-5.15.y c79648372d02 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/27 16:59 linux-5.15.y c79648372d02 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/27 14:35 linux-5.15.y c79648372d02 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/27 04:19 linux-5.15.y c79648372d02 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/26 17:28 linux-5.15.y c79648372d02 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/26 16:04 linux-5.15.y c79648372d02 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/26 16:00 linux-5.15.y c79648372d02 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/26 14:22 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/26 09:51 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/26 06:37 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/26 02:10 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/26 01:04 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/25 23:37 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/25 22:03 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/25 17:34 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/25 10:26 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/25 05:48 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/25 02:52 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/25 01:51 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/25 00:10 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/24 20:59 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/24 05:05 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/24 03:58 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/24 03:56 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nilfs_dat_commit_end
2025/08/22 03:48 linux-5.15.y c79648372d02 bf27483f .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
2025/08/27 05:36 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
2025/08/26 19:25 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
2025/08/24 22:29 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in nilfs_dat_commit_end
2025/08/24 12:28 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in nilfs_dat_commit_end
2025/08/24 09:15 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in nilfs_dat_commit_end
2025/08/22 08:49 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in nilfs_dat_commit_end
2025/08/22 05:25 linux-5.15.y c79648372d02 bf27483f .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.