syzbot


WARNING in udf_open_lvid

Status: upstream: reported C repro on 2026/05/18 11:56
Subsystems: udf
Labels: prio:low
[Documentation on labels]
Reported-by: syzbot+0306b38d9ed6ef71467d@syzkaller.appspotmail.com
First crash: 41d, last: 3d22h
✨ AI Patch Versions (3)
Version Stage Reported Report Link Job
1 upstream 2026/06/23 12:30 Discussion 05f8e20f-f080-4c7f-a206-08dbc15cb4a1
2 moderation 2026/06/22 19:37 Discussion 05f8e20f-f080-4c7f-a206-08dbc15cb4a1
1 moderation 2026/06/22 17:43 Discussion 83a8a238-e94a-44e6-8088-8640cf9cb7e0
✨ AI Jobs (3)
ID Workflow Result Correct Bug Created Started Finished Revision Error
05f8e20f-f080-4c7f-a206-08dbc15cb4a1 patch-iteration WARNING in udf_open_lvid 2026/06/22 18:35 2026/06/22 18:35 2026/06/22 19:37 5a630be623a83f54a0e7a5a72d78827acdc85248

			
		
83a8a238-e94a-44e6-8088-8640cf9cb7e0 patching WARNING in udf_open_lvid 2026/06/22 15:00 2026/06/22 15:00 2026/06/22 17:43 5a630be623a83f54a0e7a5a72d78827acdc85248

			
		
e848db50-8889-464c-8c1a-a8180ed47fc7 assessment-security DenialOfService: ❌ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ✅ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ WARNING in udf_open_lvid 2026/05/30 11:51 2026/05/30 11:51 2026/05/30 12:48 6b4a844333e83556da95d61d7f207e7ef5cd4bc6

			
		
Discussions (2)
Title Replies (including bot) Last reply
[PATCH] udf: Mark LVID buffer as uptodate before marking it dirty 2 (2) 2026/06/24 09:59
[syzbot] [udf?] WARNING in udf_open_lvid 0 (2) 2026/06/21 12:16

Sample crash report:
Buffer I/O error on dev loop0, logical block 128, lost sync page write
Buffer I/O error on dev loop0, logical block 128, lost sync page write
------------[ cut here ]------------
!buffer_uptodate(bh)
WARNING: fs/buffer.c:1093 at mark_buffer_dirty+0x299/0x410 fs/buffer.c:1093, CPU#0: syz.0.17/5507
Modules linked in:
CPU: 0 UID: 0 PID: 5507 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:mark_buffer_dirty+0x299/0x410 fs/buffer.c:1093
Code: 4c 89 f7 e8 89 39 d9 ff 49 8b 3e be 40 00 00 00 5b 41 5c 41 5e 41 5f 5d e9 d4 5e fb ff e8 4f 21 6a ff eb 8c e8 48 21 6a ff 90 <0f> 0b 90 e9 a5 fd ff ff e8 3a 21 6a ff 90 0f 0b 90 e9 cf fd ff ff
RSP: 0018:ffffc90002c9fbd0 EFLAGS: 00010293
RAX: ffffffff825c23b8 RBX: ffff888043a54ee0 RCX: ffff88803ed24a80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffc90002c9fc01 R08: ffff888043a54ee7 R09: 1ffff1100874a9dc
R10: dffffc0000000000 R11: ffffed100874a9dd R12: ffff888043a54ee0
R13: ffff88804cc8300b R14: dffffc0000000000 R15: ffff88804cc83004
FS:  000055555d97a500(0000) GS:ffff88808c848000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b73471c138 CR3: 0000000040090000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 udf_open_lvid+0x369/0x5b0 fs/udf/super.c:2092
 udf_reconfigure+0x336/0x540 fs/udf/super.c:679
 reconfigure_super+0x232/0x8f0 fs/super.c:1020
 vfs_cmd_reconfigure fs/fsopen.c:268 [inline]
 vfs_fsconfig_locked+0x171/0x320 fs/fsopen.c:297
 __do_sys_fsconfig fs/fsopen.c:463 [inline]
 __se_sys_fsconfig+0x6b9/0x810 fs/fsopen.c:350
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc7a1b9ce59
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:00007ffcc3519a48 EFLAGS: 00000246 ORIG_RAX: 00000000000001af
RAX: ffffffffffffffda RBX: 00007fc7a1e15fa0 RCX: 00007fc7a1b9ce59
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000006
RBP: 00007fc7a1c32e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc7a1e15fac R14: 00007fc7a1e15fa0 R15: 00007fc7a1e15fa0
 </TASK>

Crashes (21):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/06/21 12:16 upstream 390d73adf896 43bfcdb0 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root WARNING in udf_open_lvid
2026/06/21 11:24 upstream 390d73adf896 43bfcdb0 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in udf_open_lvid
2026/06/19 06:18 upstream 83f1454877cc d7ffd47b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in udf_open_lvid
2026/06/18 07:33 upstream e771677c937d b62b3ded .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in udf_open_lvid
2026/06/13 20:13 upstream 062871f1371b 4f06757f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in udf_open_lvid
2026/06/13 09:21 upstream 1dadb7e7eb5a 4f06757f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in udf_open_lvid
2026/06/12 19:35 upstream 1dadb7e7eb5a 8f6cdf3b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in udf_open_lvid
2026/06/10 09:59 upstream 685441a6d3f1 34dab4be .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in udf_open_lvid
2026/06/10 08:03 upstream 685441a6d3f1 34dab4be .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in udf_open_lvid
2026/06/07 04:02 upstream 8e65320d91cd cc095639 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in udf_open_lvid
2026/06/07 00:32 upstream 8e65320d91cd cc095639 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in udf_open_lvid
2026/06/04 13:06 upstream ba3e43a9e601 197909be .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in udf_open_lvid
2026/06/04 10:44 upstream ba3e43a9e601 197909be .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in udf_open_lvid
2026/06/02 02:55 upstream e43ffb69e043 1095583b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in udf_open_lvid
2026/05/30 21:55 upstream f5e5d3509bff 6b4a8443 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in udf_open_lvid
2026/05/30 01:58 upstream 9215e74f228f 6b4a8443 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in udf_open_lvid
2026/05/28 16:19 upstream eb3f4b7426cf 9a5a7e5e .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in udf_open_lvid
2026/05/23 07:09 upstream cca95436be15 c69befb3 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in udf_open_lvid
2026/05/17 07:39 upstream 6916d5703ddf de5aae85 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in udf_open_lvid
2026/05/15 06:35 upstream 66182ca873a4 6ccb967e .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in udf_open_lvid
2026/05/14 11:47 upstream e1914add2799 6ccb967e .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in udf_open_lvid
* Struck through repros no longer work on HEAD.