syzbot


WARNING in __udf_add_aext (3)

Status: upstream: reported C repro on 2024/04/08 08:26
Subsystems: udf
[Documentation on labels]
Reported-by: syzbot+799a0e744ac47f928024@syzkaller.appspotmail.com
First crash: 613d, last: 1h54m
Cause bisection: failed (error log, bisect log)
  
Discussions (19)
Title Replies (including bot) Last reply
[syzbot] Monthly udf report (Oct 2025) 0 (1) 2025/10/27 12:50
[syzbot] Monthly udf report (Sep 2025) 0 (1) 2025/09/26 05:14
[syzbot] Monthly udf report (Aug 2025) 0 (1) 2025/08/26 07:14
[syzbot] Monthly udf report (Jul 2025) 0 (1) 2025/07/26 20:43
[syzbot] Monthly udf report (Jun 2025) 0 (1) 2025/06/24 13:54
[syzbot] Monthly udf report (May 2025) 0 (1) 2025/05/24 10:05
[syzbot] Monthly udf report (Apr 2025) 0 (1) 2025/04/23 07:50
[syzbot] Monthly udf report (Mar 2025) 0 (1) 2025/03/23 02:26
[syzbot] Monthly udf report (Feb 2025) 0 (1) 2025/02/19 12:35
[syzbot] Monthly udf report (Jan 2025) 0 (1) 2025/01/20 08:14
[syzbot] Monthly udf report (Dec 2024) 0 (1) 2024/12/19 18:40
[syzbot] Monthly udf report (Nov 2024) 0 (1) 2024/11/18 10:47
[syzbot] Monthly udf report (Oct 2024) 0 (1) 2024/10/17 07:41
[syzbot] Monthly udf report (Sep 2024) 0 (1) 2024/09/16 12:28
[syzbot] Monthly udf report (Aug 2024) 0 (1) 2024/08/16 09:47
[syzbot] Monthly udf report (Jul 2024) 0 (1) 2024/07/16 07:38
[syzbot] Monthly udf report (Jun 2024) 0 (1) 2024/06/15 17:49
[syzbot] Monthly udf report (May 2024) 0 (1) 2024/05/14 20:49
[syzbot] [udf?] WARNING in __udf_add_aext (3) 0 (1) 2024/04/08 08:26
Similar bugs (7)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING in __udf_add_aext origin:upstream -1 C done 134 9d10h 843d 0/3 upstream: reported C repro on 2023/08/20 05:08
linux-4.14 WARNING in __udf_add_aext udf -1 C 3 1013d 1391d 0/1 upstream: reported C repro on 2022/02/18 06:47
linux-6.6 WARNING in __udf_add_aext origin:upstream -1 C 9 1d22h 132d 0/2 upstream: reported C repro on 2025/07/30 23:41
linux-4.19 WARNING in __udf_add_aext udf -1 C error 20 1024d 1425d 0/1 upstream: reported C repro on 2022/01/14 21:09
upstream WARNING in __udf_add_aext udf -1 C error 170 919d 1156d 22/29 fixed on 2023/06/08 14:41
upstream WARNING in __udf_add_aext (2) udf -1 syz error done 6 730d 911d 25/29 fixed on 2024/01/30 15:47
linux-6.1 WARNING in __udf_add_aext origin:lts-only -1 C done 135 7d05h 793d 0/3 upstream: reported C repro on 2023/10/08 20:16

Sample crash report:
WARNING: The mand mount option has been deprecated and
         and is ignored by this kernel. Remove the mand
         option from the mount to silence this warning.
=======================================================
UDF-fs: INFO Mounting volume 'LiuxUDF', timestamp 2022/11/22 14:59 (1000)
------------[ cut here ]------------
WARNING: fs/udf/inode.c:2088 at __udf_add_aext+0x524/0x6d0 fs/udf/inode.c:2087, CPU#0: syz.0.17/6044
Modules linked in:
CPU: 0 UID: 0 PID: 6044 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__udf_add_aext+0x524/0x6d0 fs/udf/inode.c:2087
Code: c4 e7 fe 49 8b 3e 4c 89 e6 e8 c8 f4 0b ff 31 c0 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d e9 ce 66 d0 fd cc e8 5d 75 81 fe 90 <0f> 0b 90 e9 14 fc ff ff e8 4f 75 81 fe 90 0f 0b 90 e9 66 fd ff ff
RSP: 0018:ffffc90003727248 EFLAGS: 00010293
RAX: ffffffff833fda43 RBX: dffffc0000000000 RCX: ffff888079a3bd00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000001e0
RBP: 1ffff920006e4ee5 R08: ffff888079a3bd00 R09: 0000000000000002
R10: 0000000000000001 R11: 0000000000000000 R12: 00000000000001e0
R13: 0000000000000000 R14: ffffc90003727720 R15: ffffc90003727728
FS:  000055555ec8a500(0000) GS:ffff888126087000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000557c87927950 CR3: 0000000069f49000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 udf_setup_indirect_aext+0x609/0x800 fs/udf/inode.c:2050
 udf_add_aext fs/udf/inode.c:2140 [inline]
 udf_do_extend_file+0x870/0x1180 fs/udf/inode.c:591
 inode_getblk fs/udf/inode.c:843 [inline]
 udf_map_block+0xff2/0x45f0 fs/udf/inode.c:454
 __udf_get_block+0x52/0x250 fs/udf/inode.c:468
 __block_write_begin_int+0x6b5/0x1900 fs/buffer.c:2145
 block_write_begin+0x8a/0x120 fs/buffer.c:2256
 udf_write_begin+0x115/0x270 fs/udf/inode.c:262
 generic_perform_write+0x2c5/0x900 mm/filemap.c:4309
 udf_file_write_iter+0x2d5/0x6c0 fs/udf/file.c:111
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x5c9/0xb30 fs/read_write.c:686
 ksys_pwrite64 fs/read_write.c:793 [inline]
 __do_sys_pwrite64 fs/read_write.c:801 [inline]
 __se_sys_pwrite64 fs/read_write.c:798 [inline]
 __x64_sys_pwrite64+0x193/0x220 fs/read_write.c:798
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5a3f58f749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffdfe057298 EFLAGS: 00000246 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007f5a3f7e5fa0 RCX: 00007f5a3f58f749
RDX: 0000000000000001 RSI: 0000200000000140 RDI: 0000000000000004
RBP: 00007f5a3f613f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000010000000005 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5a3f7e5fa0 R14: 00007f5a3f7e5fa0 R15: 0000000000000004
 </TASK>

Crashes (1463):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/12/06 08:25 upstream 7203ca412fc8 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-root WARNING in __udf_add_aext
2025/07/26 03:14 upstream 327579671a9b fb8f743d .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-root WARNING in __udf_add_aext
2025/04/22 15:00 upstream a33b5a08cbbd 2a20f901 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2 (corrupt fs)] [mounted in repro #3] [mounted in repro #4] [mounted in repro #5 (corrupt fs)] [mounted in repro #6] ci2-upstream-fs WARNING in __udf_add_aext
2025/04/22 09:43 upstream a33b5a08cbbd 2a20f901 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2 (corrupt fs)] [mounted in repro #3] [mounted in repro #4 (clean fs)] ci2-upstream-fs WARNING in __udf_add_aext
2024/11/23 04:28 upstream 06afb0f36106 68da6d95 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs WARNING in __udf_add_aext
2024/07/22 19:24 upstream 933069701c1b f063dfd9 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-root WARNING in __udf_add_aext
2024/07/22 18:46 upstream 933069701c1b f063dfd9 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-root WARNING in __udf_add_aext
2025/12/07 09:14 upstream c06c303832ec d1b870e1 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/11/27 12:26 upstream 4941a17751c9 e8331348 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/11/24 01:56 upstream d0e88704d96c 4fb8ef37 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/11/15 10:42 upstream 7a0892d2836e f7988ea4 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/08/06 02:19 upstream 6bcdbd62bd56 ffe1dd46 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/06/08 17:17 upstream 8630c59e9936 4826c28e .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root WARNING in __udf_add_aext
2024/10/24 08:02 upstream c2ee9f594da8 15fa2979 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root WARNING in __udf_add_aext
2024/07/22 18:00 linux-next 41c196e567fb f063dfd9 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root WARNING in __udf_add_aext
2024/07/22 17:26 linux-next 41c196e567fb f063dfd9 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root WARNING in __udf_add_aext
2024/04/06 13:10 linux-next 8568bb2ccc27 ca620dd8 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root WARNING in __udf_add_aext
2024/08/17 06:50 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 5c43d43bad35 76120936 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-gce-arm64 WARNING in __udf_add_aext
2024/10/29 19:24 upstream e42b1a9a2557 66aeb999 .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs WARNING in __udf_add_aext
2025/04/20 07:53 upstream 119009db2674 2a20f901 .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root WARNING in __udf_add_aext
2024/08/17 00:07 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 5c43d43bad35 76120936 .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-gce-arm64 WARNING in __udf_add_aext
2025/12/07 13:38 upstream 50471f8b7371 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in __udf_add_aext
2025/11/25 00:31 upstream ac3fd01e4c1e bf6fe8fe .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in __udf_add_aext
2025/11/24 01:38 upstream d13f3ac64efb 4fb8ef37 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in __udf_add_aext
2025/11/16 16:09 upstream f824272b6e3f f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in __udf_add_aext
2025/09/26 12:22 upstream 4ff71af020ae 0abd0691 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in __udf_add_aext
2025/09/17 15:17 upstream 5aca7966d2a7 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __udf_add_aext
2024/06/24 14:20 upstream f2661062f16b edc5149a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in __udf_add_aext
2024/06/17 08:06 upstream 2ccbdf43d5e7 f429ab00 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in __udf_add_aext
2025/12/10 13:43 upstream c9b47175e913 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/12/09 10:52 upstream a110f942672c d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/12/09 02:12 upstream a110f942672c d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/12/08 21:08 upstream c2f2b01b74be d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/12/08 18:39 upstream c2f2b01b74be d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/12/08 06:30 upstream c2f2b01b74be d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/12/06 02:37 upstream d1d36025a617 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/12/05 23:26 upstream d1d36025a617 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/12/04 23:52 upstream 6dfafbd0299a d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/12/01 18:43 upstream 7d0a66e4bb90 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/11/30 09:58 upstream 6bda50f4333f d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/11/29 06:41 upstream 19eef1d98eed d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/11/29 02:32 upstream e538109ac71d d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/11/28 16:21 upstream e538109ac71d d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/11/27 22:09 upstream 765e56e41a5a e8331348 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/11/26 08:27 upstream 30f09200cc4a bf6fe8fe .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/11/26 04:32 upstream 8a2bcda5e139 bf6fe8fe .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/11/24 20:48 upstream ac3fd01e4c1e bf6fe8fe .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/11/23 15:01 upstream d13f3ac64efb 4fb8ef37 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/11/21 09:50 upstream 8e621c9a3375 280ea308 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/11/21 09:04 upstream 8e621c9a3375 280ea308 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/11/20 03:59 upstream 23cb64fb7625 26ee5237 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/11/20 00:49 upstream 23cb64fb7625 26ee5237 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/11/19 02:14 upstream 5bebe8de1926 ef766cd7 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/11/17 18:03 upstream 6a23ae0a96a6 c1ade9dd .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/11/17 08:22 upstream 6a23ae0a96a6 f7988ea4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/11/16 22:52 upstream 7254a2b52279 f7988ea4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/11/16 08:32 upstream f824272b6e3f f7988ea4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/11/15 16:17 upstream 7a0892d2836e f7988ea4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/11/15 09:45 upstream 7a0892d2836e f7988ea4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/11/12 19:51 upstream 24172e0d7990 07e030de .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/11/11 15:02 upstream 4427259cc7f7 4e1406b4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2025/11/11 00:16 upstream 4ea7c1717f3f 4e1406b4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __udf_add_aext
2024/06/25 03:06 upstream 626737a5791b c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in __udf_add_aext
2025/12/04 19:15 linux-next bc04acf4aeca d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in __udf_add_aext
2025/12/03 22:16 linux-next b2c27842ba85 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in __udf_add_aext
2025/11/30 02:48 linux-next 7d31f578f323 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in __udf_add_aext
2025/12/07 03:58 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 05c93f3395ed d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __udf_add_aext
2025/12/04 16:09 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 05c93f3395ed d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __udf_add_aext
2025/12/02 14:08 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 05c93f3395ed d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __udf_add_aext
2025/11/24 11:32 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 3812f8fa7c83 4fb8ef37 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __udf_add_aext
2025/11/23 21:01 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 3812f8fa7c83 4fb8ef37 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __udf_add_aext
2025/11/21 17:43 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 3812f8fa7c83 c31c1b0b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __udf_add_aext
* Struck through repros no longer work on HEAD.