syzbot


WARNING in ocfs2_unlink

Status: upstream: reported C repro on 2025/01/10 17:34
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+ca2b3d3c4338a476f16d@syzkaller.appspotmail.com
First crash: 154d, last: 15d
Fix bisection: failed (error log, bisect log)
  
Bug presence (1)
Date Name Commit Repro Result
2025/01/11 upstream (ToT) 77a903cd8e5a C [report] WARNING in ocfs2_unlink
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in ocfs2_unlink ocfs2 C inconclusive 24 3d20h 150d 0/28 upstream: reported C repro on 2025/01/14 14:59
Last patch testing requests (7)
Created Duration User Patch Repo Result
2025/05/26 06:47 13m retest repro linux-5.15.y report log
2025/05/26 06:47 13m retest repro linux-5.15.y report log
2025/04/06 13:37 15m retest repro linux-5.15.y report log
2025/04/06 13:37 11m retest repro linux-5.15.y report log
2025/01/25 20:29 11m retest repro linux-5.15.y report log
2025/01/25 20:29 11m retest repro linux-5.15.y report log
2025/01/25 20:29 11m retest repro linux-5.15.y report log

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4025 at fs/inode.c:332 drop_nlink+0xe8/0x148 fs/inode.c:332
Modules linked in:
CPU: 1 PID: 4025 Comm: syz-executor284 Not tainted 5.15.182-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : drop_nlink+0xe8/0x148 fs/inode.c:332
lr : drop_nlink+0xe8/0x148 fs/inode.c:332
sp : ffff80001f4a77e0
x29: ffff80001f4a77e0 x28: 1fffe0001bdfb82f x27: ffff0000defd0878
x26: ffff0000defd0878 x25: ffff700003e94f10 x24: 000000000000002a
x23: 1fffe0001bdfa118 x22: dfff800000000000 x21: 0000000000000000
x20: ffff0000defd08c0 x19: ffff0000defd0878 x18: 0000000000000000
x17: ffff800016cdf000 x16: ffff8000082bf2a4 x15: ffff8000167bf4c0
x14: ffff0000d5148a00 x13: 0000000039387000 x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000894eb38
x8 : ffff0000d5148000 x7 : 0000000039387000 x6 : 000000000000002a
x5 : ffff0000defd0900 x4 : ffff0000defd08f0 x3 : ffff800009c9c51c
x2 : 0000000000000010 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 drop_nlink+0xe8/0x148 fs/inode.c:332
 ocfs2_unlink+0xcc8/0x1554 fs/ocfs2/namei.c:1002
 vfs_rmdir+0x1c4/0x3ec fs/namei.c:4149
 do_rmdir+0x240/0x634 fs/namei.c:4210
 __do_sys_unlinkat fs/namei.c:4390 [inline]
 __se_sys_unlinkat fs/namei.c:4384 [inline]
 __arm64_sys_unlinkat+0xcc/0xfc fs/namei.c:4384
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
irq event stamp: 16092
hardirqs last  enabled at (16091): [<ffff800008387d94>] seqcount_lockdep_reader_access+0x1fc/0x2c4 include/linux/seqlock.h:105
hardirqs last disabled at (16092): [<ffff8000111a0cd0>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396
softirqs last  enabled at (15768): [<ffff80000819d0d8>] softirq_handle_end kernel/softirq.c:401 [inline]
softirqs last  enabled at (15768): [<ffff80000819d0d8>] handle_softirqs+0xa4c/0xbf0 kernel/softirq.c:586
softirqs last disabled at (15763): [<ffff80000819d6dc>] __do_softirq kernel/softirq.c:592 [inline]
softirqs last disabled at (15763): [<ffff80000819d6dc>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (15763): [<ffff80000819d6dc>] invoke_softirq kernel/softirq.c:439 [inline]
softirqs last disabled at (15763): [<ffff80000819d6dc>] __irq_exit_rcu+0x240/0x440 kernel/softirq.c:641
---[ end trace 6c493ba46b35b9da ]---

Crashes (11):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/05/12 05:55 linux-5.15.y 3b8db0e4f263 77908e5f .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-5-15-kasan-arm64 WARNING in ocfs2_unlink
2025/01/11 05:39 linux-5.15.y 4735586da88e 6dbc6a9b .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING in ocfs2_unlink
2025/01/11 04:39 linux-5.15.y 4735586da88e 6dbc6a9b .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING in ocfs2_unlink
2025/01/11 03:25 linux-5.15.y 4735586da88e 6dbc6a9b .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING in ocfs2_unlink
2025/05/29 18:02 linux-5.15.y 98f47d0e9b8c 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ocfs2_unlink
2025/05/29 18:01 linux-5.15.y 98f47d0e9b8c 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ocfs2_unlink
2025/05/29 18:01 linux-5.15.y 98f47d0e9b8c 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ocfs2_unlink
2025/05/28 14:56 linux-5.15.y 98f47d0e9b8c 874a1386 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ocfs2_unlink
2025/05/12 04:53 linux-5.15.y 3b8db0e4f263 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in ocfs2_unlink
2025/01/11 08:40 linux-5.15.y 4735586da88e 6dbc6a9b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in ocfs2_unlink
2025/01/10 17:34 linux-5.15.y 4735586da88e 67d7ec0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in ocfs2_unlink
* Struck through repros no longer work on HEAD.