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WARNING in __udf_add_aext

Status: upstream: reported C repro on 2023/08/20 05:08
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+6a9661c8887dbe7bd474@syzkaller.appspotmail.com
First crash: 1010d, last: 3d12h
Fix commit to backport (bisect log) :
tree: upstream
commit c2efd13a2ed4f29bf9ef14ac2fbb7474084655f8
Author: Jan Kara <jack@suse.cz>
Date: Wed Jan 25 16:56:06 2023 +0000

  udf: Limit file size to 4TB

[report pending]
  
Fix bisection: the issue occurs on the latest tested release (bisect log)
Crash: WARNING in __udf_add_aext (log)
Repro: C syz .config
  
▶ ▼ Bug presence (1)
Date Name Commit Repro Result
2025/01/15 upstream (ToT) 7f5b6a8ec18e C [report] WARNING in __udf_add_aext
▶ ▼ Similar bugs (7)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 WARNING in __udf_add_aext udf -1 C 3 1180d 1558d 0/1 upstream: reported C repro on 2022/02/18 06:47
linux-6.6 WARNING in __udf_add_aext origin:upstream -1 C error 14 63d 299d 0/2 upstream: reported C repro on 2025/07/30 23:41
upstream WARNING in __udf_add_aext (3) udf -1 C error 1682 7h10m 778d 0/29 upstream: reported C repro on 2024/04/08 08:26
linux-4.19 WARNING in __udf_add_aext udf -1 C error 20 1192d 1593d 0/1 upstream: reported C repro on 2022/01/14 21:09
upstream WARNING in __udf_add_aext udf -1 C error 170 1086d 1324d 22/29 fixed on 2023/06/08 14:41
upstream WARNING in __udf_add_aext (2) udf -1 syz error done 6 897d 1078d 25/29 fixed on 2024/01/30 15:47
linux-6.1 WARNING in __udf_add_aext origin:lts-only -1 C done 157 2d15h 961d 0/3 upstream: reported C repro on 2023/10/08 20:16
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2026/05/23 10:54 23m retest repro linux-5.15.y report log
2026/05/23 10:54 17m retest repro linux-5.15.y report log
2026/04/05 04:26 9m retest repro linux-5.15.y report log
2026/04/05 04:26 18m retest repro linux-5.15.y report log
2026/04/05 04:26 10m retest repro linux-5.15.y report log
2026/03/12 15:08 12m retest repro linux-5.15.y report log
2026/01/25 03:46 11m retest repro linux-5.15.y report log
2026/01/25 03:46 15m retest repro linux-5.15.y report log
2026/01/25 03:46 10m retest repro linux-5.15.y report log
2026/01/01 13:53 14m retest repro linux-5.15.y report log
▶ ▼ Fix bisection attempts (4)
Created Duration User Patch Repo Result
2024/01/03 14:29 4h30m fix candidate upstream OK (1) job log
2023/12/12 18:51 1h09m bisect fix linux-5.15.y OK (0) job log log
2023/11/11 17:27 50m bisect fix linux-5.15.y OK (0) job log log
2023/10/10 07:16 1h11m bisect fix linux-5.15.y OK (0) job log log

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4440 at fs/udf/inode.c:1935 __udf_add_aext+0x51a/0x6c0 fs/udf/inode.c:1934
Modules linked in:
CPU: 0 PID: 4440 Comm: syz.0.38 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__udf_add_aext+0x51a/0x6c0 fs/udf/inode.c:1934
Code: 08 4c 89 f7 e8 47 1b f6 fe 49 8b 3e 4c 89 e6 e8 ac e6 0f ff 31 c0 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 56 fc b0 fe <0f> 0b e9 1b fc ff ff e8 4a fc b0 fe 0f 0b e9 6f fd ff ff e8 3e fc
RSP: 0018:ffffc9000372f848 EFLAGS: 00010293
RAX: ffffffff82c8383a RBX: dffffc0000000000 RCX: ffff88807acf0000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000001e0
RBP: 1ffff920006e5f75 R08: ffff88807acf0000 R09: 0000000000000002
R10: 0000000000000001 R11: 0000000000000000 R12: 00000000000001e0
R13: 0000000000000000 R14: ffffc9000372fba0 R15: ffffc9000372fba8
FS:  00007f722258c6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00001d6816bce501 CR3: 00000000743c1000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 udf_setup_indirect_aext+0x552/0x710 fs/udf/inode.c:1900
 udf_add_aext fs/udf/inode.c:1987 [inline]
 udf_do_extend_file+0x6a8/0x10b0 fs/udf/inode.c:472
 udf_extend_file fs/udf/inode.c:586 [inline]
 udf_setsize+0xb15/0x10c0 fs/udf/inode.c:1156
 udf_setattr+0x404/0x560 fs/udf/file.c:277
 notify_change+0xbcd/0xee0 fs/attr.c:505
 do_truncate+0x1ac/0x240 fs/open.c:65
 vfs_truncate+0x262/0x2f0 fs/open.c:111
 do_sys_truncate+0xf2/0x1c0 fs/open.c:134
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f7222f4bdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f722258c028 EFLAGS: 00000246 ORIG_RAX: 000000000000004c
RAX: ffffffffffffffda RBX: 00007f72231c5090 RCX: 00007f7222f4bdd9
RDX: 0000000000000000 RSI: 000000400000f007 RDI: 0000200000000080
RBP: 00007f7222fe1d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f72231c5128 R14: 00007f72231c5090 R15: 00007ffe7edc1688
 </TASK>

Crashes (136):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/05/06 20:11 linux-5.15.y ef251c45f1cd 1dddfd3d .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2025/04/24 20:12 linux-5.15.y f7347f400572 9882047a .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2025/03/02 17:38 linux-5.15.y c16c81c81336 c3901742 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2024/07/28 10:04 linux-5.15.y 7e89efd3ae1c 46eb10b7 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2024/11/16 12:19 linux-5.15.y d98fd109f827 cfe3a04a .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING in __udf_add_aext
2026/05/06 17:59 linux-5.15.y ef251c45f1cd 1dddfd3d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2025/12/01 05:13 linux-5.15.y cc5ec8769306 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2025/11/01 06:50 linux-5.15.y cc5ec8769306 2c50b6a9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2025/10/01 16:01 linux-5.15.y 43bb85222e53 a1859138 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2025/09/27 00:19 linux-5.15.y 43bb85222e53 001c9061 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2025/09/26 05:58 linux-5.15.y 43bb85222e53 0abd0691 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2025/09/23 22:29 linux-5.15.y 43bb85222e53 e667a34f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2025/09/20 18:42 linux-5.15.y 43bb85222e53 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2025/09/19 16:25 linux-5.15.y 43bb85222e53 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2025/09/14 20:41 linux-5.15.y 43bb85222e53 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2025/05/17 01:44 linux-5.15.y 3b8db0e4f263 f41472b0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2025/04/27 13:32 linux-5.15.y f7347f400572 c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2025/04/23 11:37 linux-5.15.y f7347f400572 53a8b9bd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2025/04/21 00:49 linux-5.15.y f7347f400572 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2025/04/18 01:26 linux-5.15.y f7347f400572 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2025/04/10 21:41 linux-5.15.y f7347f400572 1ef3ab4d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2025/04/03 09:14 linux-5.15.y 0c935c049b5c 996a9618 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2025/03/31 04:47 linux-5.15.y 0c935c049b5c d3999433 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2025/03/02 17:00 linux-5.15.y c16c81c81336 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2025/01/27 02:20 linux-5.15.y 003148680b79 9fbd772e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2024/12/31 19:36 linux-5.15.y 91786f140358 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2024/12/30 19:52 linux-5.15.y 91786f140358 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2024/11/23 11:52 linux-5.15.y 0a51d2d4527b 68da6d95 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2024/10/31 23:48 linux-5.15.y 74cdd62cb470 96eb609f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2024/10/27 21:07 linux-5.15.y 74cdd62cb470 65e8686b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2024/09/23 20:09 linux-5.15.y 3a5928702e71 89298aad .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2024/09/08 15:46 linux-5.15.y 14e468424d3e 9750182a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2024/09/08 09:59 linux-5.15.y 14e468424d3e 9750182a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2024/09/08 09:58 linux-5.15.y 14e468424d3e 9750182a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2024/09/08 01:44 linux-5.15.y 14e468424d3e 9750182a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2024/08/12 01:48 linux-5.15.y 7e89efd3ae1c 6f4edef4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2024/08/11 23:46 linux-5.15.y 7e89efd3ae1c 6f4edef4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2024/08/01 16:36 linux-5.15.y 7e89efd3ae1c 1e9c4cf3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2024/07/29 09:30 linux-5.15.y 7e89efd3ae1c 46eb10b7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2024/07/29 05:00 linux-5.15.y 7e89efd3ae1c 46eb10b7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2024/04/14 04:06 linux-5.15.y fa3df276cd36 c8349e48 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in __udf_add_aext
2023/08/20 05:08 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_add_aext
2025/07/16 23:51 linux-5.15.y 89950c454265 44f8051e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __udf_add_aext
2025/07/14 21:33 linux-5.15.y 89950c454265 d8fc7335 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __udf_add_aext
2025/07/13 19:49 linux-5.15.y 2f693b607545 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __udf_add_aext
2025/07/08 18:40 linux-5.15.y 3dea0e7f549e 4d9fdfa4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __udf_add_aext
2025/05/11 06:36 linux-5.15.y 3b8db0e4f263 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __udf_add_aext
2025/05/04 05:04 linux-5.15.y 16fdf2c7111b b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __udf_add_aext
2025/05/01 08:25 linux-5.15.y f7347f400572 ce7952f4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __udf_add_aext
2025/04/12 22:11 linux-5.15.y f7347f400572 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __udf_add_aext
2025/04/12 07:07 linux-5.15.y f7347f400572 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __udf_add_aext
2025/04/09 13:57 linux-5.15.y 0c935c049b5c 47d015b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __udf_add_aext
2025/03/21 08:25 linux-5.15.y 0c935c049b5c 62330552 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __udf_add_aext
2025/02/22 04:41 linux-5.15.y c16c81c81336 d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __udf_add_aext
2025/02/02 21:43 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_add_aext
2024/11/16 11:58 linux-5.15.y d98fd109f827 cfe3a04a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __udf_add_aext
2024/08/29 04:44 linux-5.15.y fa93fa65db6e ef3de9e8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __udf_add_aext
2024/08/26 04:59 linux-5.15.y fa93fa65db6e d7d32352 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __udf_add_aext
2024/08/01 15:03 linux-5.15.y 7e89efd3ae1c 1e9c4cf3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __udf_add_aext
* Struck through repros no longer work on HEAD.