[fs?] WARNING in do_mknodat (2)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 38f8ccde04a3 Merge tag 'mm-hotfixes-stable-2023-02-17-15-1..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=13638290c80000
kernel config: https://syzkaller.appspot.com/x/.config?x=f4b0f5dd9aee9645
dashboard link: https://syzkaller.appspot.com/bug?extid=425ea1b4fb977d479731
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
CC: [linux-...@vger.kernel.org linux-...@vger.kernel.org vi...@zeniv.linux.org.uk]

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/c46a4a57319c/disk-38f8ccde.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/506bdb1d0135/vmlinux-38f8ccde.xz
kernel image: https://storage.googleapis.com/syzbot-assets/fdc3b3c0e465/bzImage-38f8ccde.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+425ea1...@syzkaller.appspotmail.com

------------[ cut here ]------------
DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff888031eda810, owner = 0x0, curr 0xffff888077461d40, list empty
WARNING: CPU: 0 PID: 9747 at kernel/locking/rwsem.c:1361 __up_write kernel/locking/rwsem.c:1360 [inline]
WARNING: CPU: 0 PID: 9747 at kernel/locking/rwsem.c:1361 up_write+0x4f9/0x580 kernel/locking/rwsem.c:1615
Modules linked in:
CPU: 1 PID: 9747 Comm: syz-executor.0 Not tainted 6.2.0-rc8-syzkaller-00134-g38f8ccde04a3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
RIP: 0010:__up_write kernel/locking/rwsem.c:1360 [inline]
RIP: 0010:up_write+0x4f9/0x580 kernel/locking/rwsem.c:1615
Code: 48 c7 c7 80 62 ea 8a 48 c7 c6 20 65 ea 8a 48 8b 54 24 28 48 8b 4c 24 18 4d 89 e0 4c 8b 4c 24 30 53 e8 2b 93 e8 ff 48 83 c4 08 <0f> 0b e9 71 fd ff ff 48 c7 c1 58 ad 52 8e 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc900160f7d40 EFLAGS: 00010292
RAX: 7d122a9740d7d800 RBX: ffffffff8aea6360 RCX: 0000000000040000
RDX: ffffc9000e460000 RSI: 000000000001e125 RDI: 000000000001e126
RBP: ffffc900160f7e10 R08: ffffffff816efb5c R09: fffff52002c1ef61
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffff888031eda810 R14: 1ffff92002c1efb0 R15: dffffc0000000000
FS: 00007f4f8cdd9700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f620271e000 CR3: 000000007954b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
inode_unlock include/linux/fs.h:761 [inline]
done_path_create fs/namei.c:3857 [inline]
do_mknodat+0x46d/0x6c0 fs/namei.c:3980
__do_sys_mknodat fs/namei.c:3993 [inline]
__se_sys_mknodat fs/namei.c:3990 [inline]
__x64_sys_mknodat+0xa9/0xc0 fs/namei.c:3990
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f4f8c08c0f9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4f8cdd9168 EFLAGS: 00000246 ORIG_RAX: 0000000000000103
RAX: ffffffffffffffda RBX: 00007f4f8c1ac120 RCX: 00007f4f8c08c0f9
RDX: 0000000000006000 RSI: 0000000020000000 RDI: ffffffffffffff9c
RBP: 00007f4f8c0e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000700 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcc088c01f R14: 00007f4f8cdd9300 R15: 0000000000022000
</TASK>


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[syzbot]

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