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WARNING in udf_truncate_extents

Status: upstream: reported C repro on 2023/03/18 20:24
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+765a118f6c231d72bfe6@syzkaller.appspotmail.com
First crash: 1051d, last: 6d23h
Fix commit to backport (bisect log) :
tree: upstream
commit 41a37d157a613444c97e8f71a5fb2a21116b70d7
Author: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Date: Mon Dec 26 04:21:51 2022 +0000

  arm64: dts: qcom: qcs404: use symbol names for PCIe resets

  
Fix bisection: failed (error log, bisect log)
  
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2024/11/05 linux-5.15.y (ToT) 72244eab0dad C [report] WARNING in udf_truncate_extents
2024/11/05 upstream (ToT) 2e1b3cc9d7f7 C Didn't crash
▶ ▼ Similar bugs (5)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 WARNING in udf_truncate_extents origin:lts-only -1 C unreliable 423 79d 1051d 0/3 upstream: reported C repro on 2023/03/19 00:16
linux-4.14 WARNING in udf_truncate_extents -1 C error 4 1223d 1434d 0/1 upstream: reported C repro on 2022/03/01 11:21
linux-4.19 WARNING in udf_truncate_extents udf -1 C error 245 1068d 1593d 0/1 upstream: reported C repro on 2021/09/23 06:31
linux-6.6 WARNING in udf_truncate_extents origin:upstream -1 C 168 1h13m 228d 0/2 upstream: reported C repro on 2025/06/19 08:31
upstream WARNING in udf_truncate_extents udf -1 C done error 16690 1h06m 1939d 0/29 upstream: reported C repro on 2020/10/12 13:20
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2026/01/26 18:43 10m retest repro linux-5.15.y report log
2026/01/06 23:33 17m retest repro linux-5.15.y report log
2026/01/06 23:33 11m retest repro linux-5.15.y report log
2025/12/20 06:32 13m retest repro linux-5.15.y report log
2025/10/26 01:25 12m retest repro linux-5.15.y report log
2025/10/26 01:25 17m retest repro linux-5.15.y report log
2025/10/10 14:32 9m retest repro linux-5.15.y report log
2025/08/16 07:36 15m retest repro linux-5.15.y report log
2025/08/16 07:36 12m retest repro linux-5.15.y report log
2025/07/29 14:48 9m retest repro linux-5.15.y report log
▶ ▼ Fix bisection attempts (3)
Created Duration User Patch Repo Result
2025/03/28 06:53 7h54m fix candidate upstream OK (1) job log
2023/11/05 00:17 8h00m fix candidate upstream OK (1) job log
2023/10/09 07:17 0m bisect fix linux-5.15.y error job log

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4221 at fs/udf/truncate.c:208 udf_truncate_extents+0xbf8/0xd70 fs/udf/truncate.c:208
Modules linked in:
CPU: 0 PID: 4221 Comm: kworker/u4:4 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: writeback wb_workfn (flush-7:0)
RIP: 0010:udf_truncate_extents+0xbf8/0xd70 fs/udf/truncate.c:208
Code: 00 00 0f 85 b6 00 00 00 89 d8 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 64 ff b2 fe bb fb ff ff ff eb 93 e8 58 ff b2 fe <0f> 0b eb 8a 44 89 f9 80 e1 07 38 c1 0f 8c 3f f5 ff ff 4c 89 ff e8
RSP: 0018:ffffc90002f0e740 EFLAGS: 00010293
RAX: ffffffff82c4ccb8 RBX: 0000000000000000 RCX: ffff88802a53d940
RDX: 0000000000000000 RSI: 0000000001d3e5fb RDI: 0000000000000000
RBP: ffffc90002f0e910 R08: ffff88802a53d940 R09: 0000000000000002
R10: 0000000000000001 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000001d3e5fb R14: ffffc90002f0e840 R15: 00000000000000ff
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c006bd2000 CR3: 000000007e781000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 udf_do_extend_file+0xd22/0x1030 fs/udf/inode.c:501
 inode_getblk fs/udf/inode.c:708 [inline]
 udf_get_block+0xdd3/0x3ca0 fs/udf/inode.c:358
 __mpage_writepage+0x4d3/0x1bf0 fs/mpage.c:564
 write_cache_pages+0x984/0xfa0 mm/page-writeback.c:2277
 mpage_writepages+0xf3/0x270 fs/mpage.c:712
 do_writepages+0x48d/0x6d0 mm/page-writeback.c:2386
 __writeback_single_inode+0x153/0xda0 fs/fs-writeback.c:1657
 writeback_sb_inodes+0x9fe/0x1610 fs/fs-writeback.c:1940
 wb_writeback+0x443/0xb90 fs/fs-writeback.c:2114
 wb_do_writeback fs/fs-writeback.c:2257 [inline]
 wb_workfn+0x423/0xe60 fs/fs-writeback.c:2298
 process_one_work+0x863/0x1000 kernel/workqueue.c:2310
 worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>

Crashes (206):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/01/12 13:32 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 udf_truncate_extents
2023/12/22 10:12 linux-5.15.y 1d146b1875fc 4f9530a3 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2025/01/13 09:05 linux-5.15.y 4735586da88e 6dbc6a9b .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING in udf_truncate_extents
2024/08/09 06:24 linux-5.15.y 7e89efd3ae1c 61405512 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING in udf_truncate_extents
2025/09/26 10:49 linux-5.15.y 43bb85222e53 0abd0691 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2025/06/28 11:56 linux-5.15.y 3dea0e7f549e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2025/06/28 11:53 linux-5.15.y 3dea0e7f549e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2025/06/28 06:50 linux-5.15.y 3dea0e7f549e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2025/04/25 08:53 linux-5.15.y f7347f400572 e3715315 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2025/04/24 10:35 linux-5.15.y f7347f400572 9882047a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2025/04/23 00:44 linux-5.15.y f7347f400572 53a8b9bd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2025/04/15 14:50 linux-5.15.y f7347f400572 23b969b7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2025/03/13 17:20 linux-5.15.y 0c935c049b5c 44be8b44 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2025/03/13 00:10 linux-5.15.y c16c81c81336 1a5d9317 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2025/03/12 05:22 linux-5.15.y c16c81c81336 ee70e6db .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2025/03/10 19:32 linux-5.15.y c16c81c81336 16256247 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2025/03/07 19:26 linux-5.15.y c16c81c81336 7e3bd60d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2025/03/06 04:03 linux-5.15.y c16c81c81336 831e3629 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2025/03/05 14:29 linux-5.15.y c16c81c81336 60f5d8d9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2025/03/04 15:49 linux-5.15.y c16c81c81336 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2025/02/28 20:50 linux-5.15.y c16c81c81336 67cf5345 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2025/02/28 19:26 linux-5.15.y c16c81c81336 67cf5345 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2025/02/28 12:28 linux-5.15.y c16c81c81336 6a8fcbc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2025/02/27 23:10 linux-5.15.y c16c81c81336 6a8fcbc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2025/02/27 22:08 linux-5.15.y c16c81c81336 6a8fcbc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2025/02/27 21:04 linux-5.15.y c16c81c81336 6a8fcbc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2025/02/27 20:12 linux-5.15.y c16c81c81336 6a8fcbc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2025/02/27 19:37 linux-5.15.y c16c81c81336 6a8fcbc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2025/02/27 17:37 linux-5.15.y c16c81c81336 6a8fcbc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2025/02/27 17:08 linux-5.15.y c16c81c81336 6a8fcbc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2025/02/27 17:01 linux-5.15.y c16c81c81336 6a8fcbc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2025/02/22 13:55 linux-5.15.y c16c81c81336 d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2025/02/22 01:20 linux-5.15.y c16c81c81336 d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2023/12/22 06:41 linux-5.15.y 1d146b1875fc 4f9530a3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2023/08/20 00:22 linux-5.15.y f6f7927ac664 d216d8a0 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2023/05/01 00:59 linux-5.15.y f48aeeaaa64c 62df2017 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2023/03/26 17:47 linux-5.15.y 115472395b0a fbf0499a .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2023/03/18 22:00 linux-5.15.y 8020ae3c051d 7939252e .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2025/02/04 04:11 linux-5.15.y c16c81c81336 8f267cef .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in udf_truncate_extents
2025/02/02 00:33 linux-5.15.y c16c81c81336 568559e4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in udf_truncate_extents
2025/01/30 23:05 linux-5.15.y 003148680b79 4c6ac32f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in udf_truncate_extents
2025/01/21 04:54 linux-5.15.y 4735586da88e 6e87cfa2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in udf_truncate_extents
2025/01/13 08:25 linux-5.15.y 4735586da88e 6dbc6a9b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in udf_truncate_extents
2024/11/26 01:00 linux-5.15.y 0a51d2d4527b 11dbc254 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in udf_truncate_extents
2024/10/25 04:17 linux-5.15.y 74cdd62cb470 c79b8ca5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in udf_truncate_extents
2024/10/22 11:59 linux-5.15.y 584a40a22cb9 a93682b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in udf_truncate_extents
2024/10/12 01:45 linux-5.15.y 3a5928702e71 084d8178 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in udf_truncate_extents
2024/10/10 07:00 linux-5.15.y 3a5928702e71 0278d004 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in udf_truncate_extents
2024/08/09 04:00 linux-5.15.y 7e89efd3ae1c 61405512 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in udf_truncate_extents
2024/07/10 15:24 linux-5.15.y f45bea23c39c bc144f9a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in udf_truncate_extents
2023/03/19 00:08 linux-5.15.y 8020ae3c051d 7939252e .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING in udf_truncate_extents
2023/07/30 04:42 linux-5.15.y 09996673e313 92476829 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2023/03/18 20:24 linux-5.15.y 8020ae3c051d 7939252e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_truncate_extents
2023/08/02 10:01 linux-5.15.y 09996673e313 df07ffe8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in udf_truncate_extents
* Struck through repros no longer work on HEAD.