syzbot


kernel BUG in link_path_walk

Status: upstream: reported C repro on 2025/12/04 00:07
Subsystems: ocfs2
[Documentation on labels]
Reported-by: syzbot+d222f4b7129379c3d5bc@syzkaller.appspotmail.com
First crash: 58d, last: 3h32m
Cause bisection: failed (error log, bisect log)
  
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [exfat?] [ocfs2?] kernel BUG in link_path_walk 24 (31) 2026/01/07 09:36
Last patch testing requests (6)
Created Duration User Patch Repo Result
2025/12/10 21:47 20m viro@zeniv.linux.org.uk patch upstream OK log
2025/12/10 19:44 20m mjguzik@gmail.com patch upstream OK log
2025/12/10 11:00 18m mjguzik@gmail.com patch upstream report log
2025/12/04 10:15 54m mjguzik@gmail.com patch linux-next report log
2025/12/04 09:09 56m mjguzik@gmail.com patch linux-next error
2025/12/04 00:46 33m mjguzik@gmail.com patch linux-next report log

Sample crash report:
(syz.0.44,5738,0):ocfs2_find_entry_id:420 ERROR: status = -30
VFS_BUG_ON_INODE(!S_ISDIR(inode->i_mode)) encountered for inode ffff888045864178
fs ocfs2 mode 100000 opflags 0x2 flags 0x20 state 0x0 count 2
------------[ cut here ]------------
kernel BUG at fs/namei.c:630!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5738 Comm: syz.0.44 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:lookup_inode_permission_may_exec fs/namei.c:630 [inline]
RIP: 0010:may_lookup fs/namei.c:1900 [inline]
RIP: 0010:link_path_walk+0x18cb/0x18d0 fs/namei.c:2537
Code: e8 ba 78 e9 fe 90 0f 0b e8 82 41 82 ff 44 89 fd e9 6a fd ff ff e8 75 41 82 ff 48 89 ef 48 c7 c6 80 e8 79 8b e8 96 78 e9 fe 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55
RSP: 0018:ffffc900035a78a0 EFLAGS: 00010282
RAX: 000000000000008e RBX: ffffc900035a7c58 RCX: 9c94389a78a54b00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffff888045864178 R08: ffffc900035a75c7 R09: 1ffff920006b4eb8
R10: dffffc0000000000 R11: fffff520006b4eb9 R12: 0000000000008000
R13: ffffc900035a7c20 R14: 0000000000008000 R15: ffff88803e713320
FS:  000055556797d500(0000) GS:ffff88808d416000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2005460000 CR3: 0000000036d1b000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 path_openat+0x2b3/0x3dd0 fs/namei.c:4783
 do_filp_open+0x1fa/0x410 fs/namei.c:4814
 do_sys_openat2+0x121/0x200 fs/open.c:1430
 do_sys_open fs/open.c:1436 [inline]
 __do_sys_openat fs/open.c:1452 [inline]
 __se_sys_openat fs/open.c:1447 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1447
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9a5b38f7c9
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:00007ffcb381c768 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f9a5b5e5fa0 RCX: 00007f9a5b38f7c9
RDX: 000000000000275a RSI: 0000200000000040 RDI: ffffffffffffff9c
RBP: 00007f9a5b413f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9a5b5e5fa0 R14: 00007f9a5b5e5fa0 R15: 0000000000000004
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:lookup_inode_permission_may_exec fs/namei.c:630 [inline]
RIP: 0010:may_lookup fs/namei.c:1900 [inline]
RIP: 0010:link_path_walk+0x18cb/0x18d0 fs/namei.c:2537
Code: e8 ba 78 e9 fe 90 0f 0b e8 82 41 82 ff 44 89 fd e9 6a fd ff ff e8 75 41 82 ff 48 89 ef 48 c7 c6 80 e8 79 8b e8 96 78 e9 fe 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55
RSP: 0018:ffffc900035a78a0 EFLAGS: 00010282
RAX: 000000000000008e RBX: ffffc900035a7c58 RCX: 9c94389a78a54b00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffff888045864178 R08: ffffc900035a75c7 R09: 1ffff920006b4eb8
R10: dffffc0000000000 R11: fffff520006b4eb9 R12: 0000000000008000
R13: ffffc900035a7c20 R14: 0000000000008000 R15: ffff88803e713320
FS:  000055556797d500(0000) GS:ffff88808d416000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f200df73460 CR3: 0000000036d1b000 CR4: 0000000000352ef0

Crashes (6297):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/12/24 13:43 upstream b927546677c8 d1b870e1 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci-snapshot-upstream-root kernel BUG in link_path_walk
2025/12/12 08:17 upstream d358e5254674 d1b870e1 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci-snapshot-upstream-root kernel BUG in link_path_walk
2025/12/11 02:33 upstream 0048fbb4011e d1b870e1 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci-snapshot-upstream-root kernel BUG in link_path_walk
2025/12/10 21:17 upstream 0048fbb4011e d1b870e1 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci-snapshot-upstream-root kernel BUG in link_path_walk
2025/12/10 18:56 upstream 0048fbb4011e d1b870e1 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci-snapshot-upstream-root kernel BUG in link_path_walk
2025/12/10 12:37 upstream c9b47175e913 d1b870e1 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci-snapshot-upstream-root kernel BUG in link_path_walk
2025/12/07 18:44 upstream 37bb2e7217b0 d1b870e1 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci-snapshot-upstream-root kernel BUG in link_path_walk
2025/12/07 06:48 upstream c06c303832ec d1b870e1 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci-snapshot-upstream-root kernel BUG in link_path_walk
2025/12/07 06:01 upstream c06c303832ec d1b870e1 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci-snapshot-upstream-root kernel BUG in link_path_walk
2025/12/07 04:33 upstream c06c303832ec d1b870e1 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci-snapshot-upstream-root kernel BUG in link_path_walk
2025/12/07 03:45 upstream c06c303832ec d1b870e1 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci-snapshot-upstream-root kernel BUG in link_path_walk
2025/11/30 10:49 linux-next 7d31f578f323 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci-upstream-linux-next-kasan-gce-root kernel BUG in link_path_walk
2025/11/30 09:38 linux-next 7d31f578f323 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci-upstream-linux-next-kasan-gce-root kernel BUG in link_path_walk
2025/11/30 08:24 linux-next 7d31f578f323 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci-upstream-linux-next-kasan-gce-root kernel BUG in link_path_walk
2025/11/30 06:57 linux-next 7d31f578f323 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci-upstream-linux-next-kasan-gce-root kernel BUG in link_path_walk
2025/12/07 05:14 upstream c06c303832ec d1b870e1 .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci-snapshot-upstream-root kernel BUG in link_path_walk
2025/11/30 01:25 linux-next 7d31f578f323 d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci-upstream-linux-next-kasan-gce-root kernel BUG in link_path_walk
2026/01/03 09:06 upstream 9b0436804460 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root kernel BUG in link_path_walk
2025/12/29 19:35 upstream 7839932417dd d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root kernel BUG in link_path_walk
2026/01/27 19:18 upstream fcb70a56f4d8 43e1df1d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/27 13:25 upstream fcb70a56f4d8 43e1df1d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/27 11:45 upstream fcb70a56f4d8 43e1df1d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/27 06:24 upstream fcb70a56f4d8 efb3e894 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/27 04:33 upstream fcb70a56f4d8 efb3e894 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/27 03:19 upstream fcb70a56f4d8 efb3e894 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/27 01:00 upstream fcb70a56f4d8 efb3e894 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/26 19:11 upstream 63804fed149a 55756628 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/26 17:45 upstream 63804fed149a 55756628 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/26 14:15 upstream 63804fed149a 55756628 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/26 05:28 upstream 023777797472 02bac031 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/26 03:19 upstream 023777797472 02bac031 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/25 23:56 upstream 023777797472 02bac031 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/25 18:56 upstream d91a46d6805a 40acda8a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/25 15:03 upstream d91a46d6805a 40acda8a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/25 11:14 upstream 5dbeeb268b63 40acda8a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/25 09:33 upstream 5dbeeb268b63 40acda8a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/25 08:26 upstream 5dbeeb268b63 40acda8a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/25 07:14 upstream 5dbeeb268b63 40acda8a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/25 06:13 upstream 5dbeeb268b63 40acda8a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/25 05:56 upstream 5dbeeb268b63 40acda8a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/25 03:36 upstream 5dbeeb268b63 40acda8a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/25 01:38 upstream 5dbeeb268b63 40acda8a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/24 21:38 upstream 62085877ae65 40acda8a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/24 20:02 upstream 62085877ae65 40acda8a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/24 18:36 upstream 62085877ae65 40acda8a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/24 17:34 upstream 62085877ae65 40acda8a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/24 16:19 upstream 62085877ae65 40acda8a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/24 15:06 upstream 62085877ae65 40acda8a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/24 12:26 upstream 62085877ae65 40acda8a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/24 06:25 upstream c133687c2eae 4f25b9b4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/24 04:56 upstream c133687c2eae 4f25b9b4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/24 03:07 upstream c133687c2eae 4f25b9b4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/24 01:57 upstream c133687c2eae 4f25b9b4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/19 06:24 linux-next 46fe65a2c28e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root kernel BUG in link_path_walk
2026/01/27 16:59 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 9a514c2f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in link_path_walk
2026/01/27 08:30 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 efb3e894 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in link_path_walk
2026/01/27 05:41 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 efb3e894 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in link_path_walk
2026/01/26 21:04 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 a4c52dd6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in link_path_walk
2026/01/26 15:31 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 a4c52dd6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in link_path_walk
2026/01/26 07:33 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 55756628 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in link_path_walk
2026/01/26 04:20 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 55756628 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in link_path_walk
2026/01/25 17:26 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 40acda8a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in link_path_walk
2026/01/25 16:26 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 40acda8a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in link_path_walk
2026/01/25 14:47 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 40acda8a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in link_path_walk
2026/01/25 12:33 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 40acda8a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in link_path_walk
2026/01/25 04:38 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 40acda8a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in link_path_walk
2026/01/24 09:52 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 4f25b9b4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in link_path_walk
2026/01/24 08:04 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 4f25b9b4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in link_path_walk
* Struck through repros no longer work on HEAD.