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: 55d, last: 1h45m
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 (6196):
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
2026/01/24 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
2026/01/23 20:51 upstream c072629f05d7 319d7797 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/23 18:31 upstream c072629f05d7 319d7797 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/23 16:35 upstream c072629f05d7 319d7797 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/23 15:10 upstream c072629f05d7 319d7797 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/23 13:26 upstream c072629f05d7 319d7797 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/23 08:50 upstream c072629f05d7 82c9c083 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/23 07:21 upstream c072629f05d7 82c9c083 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/23 02:50 upstream a66191c590b3 82c9c083 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/23 01:16 upstream a66191c590b3 82c9c083 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/22 23:29 upstream a66191c590b3 82c9c083 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/22 19:28 upstream a66191c590b3 a16aed1d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/22 17:03 upstream a66191c590b3 a16aed1d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/22 17:02 upstream a66191c590b3 a16aed1d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/22 15:07 upstream a66191c590b3 a16aed1d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/22 06:44 upstream cf38b2340c0e 8fc37797 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/22 04:17 upstream cf38b2340c0e 8fc37797 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/22 02:55 upstream cf38b2340c0e 8fc37797 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/22 01:36 upstream cf38b2340c0e 8fc37797 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/21 23:44 upstream cf38b2340c0e 8fc37797 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/21 19:40 upstream 6c790212c588 6f1aa2f9 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/21 18:24 upstream 6c790212c588 6f1aa2f9 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/21 17:29 upstream 6c790212c588 6f1aa2f9 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/21 15:54 upstream 6c790212c588 6f1aa2f9 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/21 14:51 upstream 6c790212c588 6f1aa2f9 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/21 13:37 upstream 6c790212c588 6f1aa2f9 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/21 08:29 upstream c03e9c42ae8f 2494e18d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/21 06:34 upstream c03e9c42ae8f 2494e18d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/21 03:09 upstream c03e9c42ae8f 2494e18d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/20 19:34 upstream 24d479d26b25 572effc1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/20 17:27 upstream 24d479d26b25 572effc1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/01/20 14:34 upstream 24d479d26b25 572effc1 .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
2026/01/24 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
2026/01/23 23:05 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 3181850c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in link_path_walk
2026/01/23 19:40 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 3181850c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in link_path_walk
2026/01/23 11:13 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 82c9c083 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in link_path_walk
2026/01/23 10:04 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 82c9c083 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in link_path_walk
2026/01/23 05:16 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 82c9c083 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in link_path_walk
2026/01/22 21:55 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 2367ed1e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in link_path_walk
2026/01/22 20:52 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 2367ed1e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in link_path_walk
2026/01/22 10:16 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 101dad69 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in link_path_walk
2026/01/22 08:04 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 101dad69 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in link_path_walk
2026/01/21 21:42 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 6f1aa2f9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in link_path_walk
2026/01/21 05:26 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 2494e18d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in link_path_walk
2026/01/21 04:23 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 2494e18d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in link_path_walk
2026/01/21 03:14 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 2494e18d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in link_path_walk
2026/01/21 01:24 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 2494e18d .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.