kernel BUG in link_path_walk

Status: upstream: reported C repro on 2025/12/04 00:07
Subsystems: ocfs2
Labels: prio:high
[Documentation on labels]
Reported-by: syzbot+d222f4b7129379c3d5bc@syzkaller.appspotmail.com
Fix commit: ocfs2: do not use make_bad_inode() in ocfs2_read_inode_block_full()
Patched on: [ci-upstream-linux-next-kasan-gce-root ci-upstream-rust-kasan-gce], missing on: [ci-qemu-gce-upstream-auto ci-qemu-native-arm64-kvm ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-qemu2-riscv64 ci-snapshot-upstream-root ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-arm64 ci-upstream-gce-leak ci-upstream-kasan-badwrites-root ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce-386-root ci-upstream-kmsan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce ci2-upstream-usb]
First crash: 254d, last: now
Cause bisection: failed (error log, bisect log)
  
▶ ▼ ✨ AI Jobs (1)
ID Workflow Result Correct Bug Created Started Finished Revision
e30068d6 assessment-security DenialOfService: ❌ Exploitable: ❌ FilesystemTrigger: ✅ NetworkTrigger: ❌ PeripheralTrigger: ✅ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ ❓ kernel BUG in link_path_walk 2026/05/24 08:41 2026/05/24 08:41 2026/05/24 09:57 c69befb3
▶ ▼ Discussions (5)
Title Replies (including bot) Last reply
[syzbot] Monthly ocfs2 report (Jun 2026) 0 (1) 2026/06/10 04:32
[syzbot] Monthly ocfs2 report (May 2026) 0 (1) 2026/05/10 04:32
[syzbot] Monthly ocfs2 report (Mar 2026) 0 (1) 2026/03/09 12:29
[syzbot] Monthly ocfs2 report (Feb 2026) 0 (1) 2026/02/05 12:34
[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:
VFS_BUG_ON_INODE(!S_ISDIR(inode->i_mode)): inode:ffff888043cc5c60 fs:ocfs2 mode:100000 opflags:0x2 flags:0x20 state:0x0 count:2
------------[ cut here ]------------
kernel BUG at fs/namei.c:687!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5811 Comm: syz.0.72 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:lookup_inode_permission_may_exec fs/namei.c:687 [inline]
RIP: 0010:may_lookup fs/namei.c:1961 [inline]
RIP: 0010:link_path_walk+0x1904/0x1910 fs/namei.c:2604
Code: e8 91 69 03 00 90 0f 0b e8 19 48 79 ff 45 89 fc e9 54 fd ff ff e8 0c 48 79 ff 4c 89 e7 48 c7 c6 40 c6 de 8b e8 6d 69 03 00 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000369f968 EFLAGS: 00010246
RAX: 91554290a6aeef00 RBX: ffffc9000369fc58 RCX: 91554290a6aeef00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 0000000000008000 R08: ffffc9000369f547 R09: 1ffff920006d3ea8
R10: dffffc0000000000 R11: fffff520006d3ea9 R12: ffff888043cc5c60
R13: ffffc9000369fc70 R14: 0000000000008000 R15: ffff888041245e18
FS:  0000555574274500(0000) GS:ffff88808c815000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb8791456b8 CR3: 000000004f982000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 path_openat+0x236/0x3830 fs/namei.c:4855
 do_file_open+0x23e/0x4a0 fs/namei.c:4888
 do_sys_openat2+0x115/0x200 fs/open.c:1368
 do_sys_open fs/open.c:1374 [inline]
 __do_sys_open fs/open.c:1382 [inline]
 __se_sys_open fs/open.c:1378 [inline]
 __x64_sys_open+0x11e/0x150 fs/open.c:1378
 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: 0033:0x7f773ff9ce59
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:00007fffd1f0ef18 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f7740215fa0 RCX: 00007f773ff9ce59
RDX: 0000000000000004 RSI: 0000000000101000 RDI: 00002000000001c0
RBP: 00007f7740032e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7740215fac R14: 00007f7740215fa0 R15: 00007f7740215fa0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:lookup_inode_permission_may_exec fs/namei.c:687 [inline]
RIP: 0010:may_lookup fs/namei.c:1961 [inline]
RIP: 0010:link_path_walk+0x1904/0x1910 fs/namei.c:2604
Code: e8 91 69 03 00 90 0f 0b e8 19 48 79 ff 45 89 fc e9 54 fd ff ff e8 0c 48 79 ff 4c 89 e7 48 c7 c6 40 c6 de 8b e8 6d 69 03 00 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000369f968 EFLAGS: 00010246
RAX: 91554290a6aeef00 RBX: ffffc9000369fc58 RCX: 91554290a6aeef00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 0000000000008000 R08: ffffc9000369f547 R09: 1ffff920006d3ea8
R10: dffffc0000000000 R11: fffff520006d3ea9 R12: ffff888043cc5c60
R13: ffffc9000369fc70 R14: 0000000000008000 R15: ffff888041245e18
FS:  0000555574274500(0000) GS:ffff88808c815000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0810d86480 CR3: 000000004f982000 CR4: 0000000000352ef0

Crashes (20571):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/06/27 12:50 upstream 5a66900afbd6 fb92f11c .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
2026/06/24 02:13 upstream f31c00c377cc 042555ff .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
2026/06/22 07:24 upstream 8cd8cf7a07e5 43bfcdb0 .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
2025/12/24 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
2026/06/28 08:05 upstream 780d569e6c4b fb92f11c .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro #1 (clean fs)] [mounted in repro #2 (corrupt fs)] ci-snapshot-upstream-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
2026/07/26 22:08 upstream 3dab139d4795 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root kernel BUG in link_path_walk
2026/07/18 01:12 upstream 111e7b23e5b0 8aaff637 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs 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
2026/08/11 05:09 upstream d58772d8520c 508909ea .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/11 03:58 upstream d58772d8520c 508909ea .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/11 02:55 upstream d58772d8520c 508909ea .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/11 01:28 upstream d58772d8520c 508909ea .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/10 20:24 upstream db2ddb871435 558388e4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/10 19:46 upstream db2ddb871435 558388e4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/10 18:45 upstream db2ddb871435 558388e4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/10 17:45 upstream db2ddb871435 558388e4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/10 16:41 upstream db2ddb871435 558388e4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/10 15:40 upstream db2ddb871435 558388e4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/10 14:41 upstream db2ddb871435 558388e4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/10 13:26 upstream db2ddb871435 558388e4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/10 12:20 upstream db2ddb871435 558388e4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/10 04:07 upstream b643e495ae92 5d63f80b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/10 03:54 upstream b643e495ae92 5d63f80b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/10 02:48 upstream b643e495ae92 5d63f80b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/10 01:28 upstream b643e495ae92 5d63f80b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/10 00:16 upstream b643e495ae92 5d63f80b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/09 23:15 upstream b643e495ae92 5d63f80b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/09 21:47 upstream b643e495ae92 5d63f80b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/09 20:34 upstream b643e495ae92 5d63f80b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/09 19:42 upstream b643e495ae92 5d63f80b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/09 18:35 upstream b643e495ae92 5d63f80b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/09 14:26 upstream 06cf61899d64 5d63f80b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/09 13:09 upstream 06cf61899d64 5d63f80b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/09 11:57 upstream 06cf61899d64 5d63f80b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/09 10:43 upstream 06cf61899d64 5d63f80b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/09 09:27 upstream 06cf61899d64 5d63f80b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/09 08:11 upstream 06cf61899d64 5d63f80b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/09 06:58 upstream 06cf61899d64 5d63f80b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/09 05:55 upstream 06cf61899d64 5d63f80b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/09 01:53 upstream a59f57e2aa12 5d63f80b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/09 00:47 upstream a59f57e2aa12 5d63f80b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/08 23:22 upstream a59f57e2aa12 5d63f80b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/08 22:01 upstream a59f57e2aa12 5d63f80b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/08 21:34 upstream a59f57e2aa12 5d63f80b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/08 20:33 upstream a59f57e2aa12 5d63f80b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/08 19:32 upstream a59f57e2aa12 5d63f80b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/08 18:41 upstream a59f57e2aa12 5d63f80b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/08 17:35 upstream a59f57e2aa12 5d63f80b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/08 16:34 upstream a59f57e2aa12 5d63f80b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/08/08 16:24 upstream a59f57e2aa12 5d63f80b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in link_path_walk
2026/05/29 13:39 linux-next f7af91adc230 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root kernel BUG in link_path_walk
2026/02/09 10:00 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 4c131dc4 .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.