[v5.15] WARNING in minix_rmdir

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 0a51d2d4527b Linux 5.15.173
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=10f476e8580000
kernel config: https://syzkaller.appspot.com/x/.config?x=f63d146f1af4415a
dashboard link: https://syzkaller.appspot.com/bug?extid=47f81a30bff438dba8ed
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/733a95526889/disk-0a51d2d4.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/409603e5dc40/vmlinux-0a51d2d4.xz
kernel image: https://storage.googleapis.com/syzbot-assets/2d60efa369ee/bzImage-0a51d2d4.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+47f81a...@syzkaller.appspotmail.com

minix_free_inode: bit 4 already cleared
------------[ cut here ]------------
WARNING: CPU: 1 PID: 8738 at fs/inode.c:307 drop_nlink+0xbb/0x100
Modules linked in:
CPU: 1 PID: 8738 Comm: syz-executor Not tainted 5.15.173-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:drop_nlink+0xbb/0x100 fs/inode.c:307
Code: 49 8b 1e 48 8d bb c8 07 00 00 be 08 00 00 00 e8 bb a3 ed ff f0 48 ff 83 c8 07 00 00 5b 41 5c 41 5e 41 5f 5d c3 e8 c5 c9 a3 ff <0f> 0b eb 89 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 62 ff ff ff 4c
RSP: 0018:ffffc90003d67c90 EFLAGS: 00010293
RAX: ffffffff81dca9db RBX: 1ffff1100aeab363 RCX: ffff888022273b80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff81dca95f R09: fffffbfff1bd2d3e
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888057559b18
R13: dffffc0000000000 R14: ffff888057559ad0 R15: dffffc0000000000
FS: 000055557bc71500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3644b7f378 CR3: 0000000056de2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
inode_dec_link_count include/linux/fs.h:2505 [inline]
minix_rmdir+0x1cd/0x220 fs/minix/namei.c:181
vfs_rmdir+0x305/0x460 fs/namei.c:4149
do_rmdir+0x368/0x670 fs/namei.c:4210
__do_sys_unlinkat fs/namei.c:4390 [inline]
__se_sys_unlinkat fs/namei.c:4384 [inline]
__x64_sys_unlinkat+0xdc/0xf0 fs/namei.c:4384
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f9704c65df7
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 07 01 00 00 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:00007ffdff0ac838 EFLAGS: 00000207 ORIG_RAX: 0000000000000107
RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 00007f9704c65df7
RDX: 0000000000000200 RSI: 00007ffdff0ad9e0 RDI: 00000000ffffff9c
RBP: 00007f9704cd95fc R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000207 R12: 00007ffdff0ad9e0
R13: 00007f9704cd95fc R14: 00000000000522c7 R15: 00007ffdff0afb90
</TASK>


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[syzbot]

Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.