[syzbot] [gfs2?] WARNING in dlm_lowcomms_close

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 3708dd948844 Merge tag 'pm-7.2-rc6' of git://git.kernel.or..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12b1caea580000
kernel config: https://syzkaller.appspot.com/x/.config?x=145fa60d73086782
dashboard link: https://syzkaller.appspot.com/bug?extid=04dfbd15d442517e713a
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1020a5b9580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13057a49580000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-3708dd94.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/57f69e2a6e3b/vmlinux-3708dd94.xz
kernel image: https://storage.googleapis.com/syzbot-assets/3511d4246fb6/bzImage-3708dd94.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+04dfbd...@syzkaller.appspotmail.com

dlm: closing connection to node 1
------------[ cut here ]------------
!con
WARNING: fs/dlm/lowcomms.c:1455 at dlm_lowcomms_close+0x3d/0x21b fs/dlm/lowcomms.c:1455, CPU#1: syz.0.18/5929
Modules linked in:
CPU: 1 UID: 0 PID: 5929 Comm: syz.0.18 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:dlm_lowcomms_close+0x3d/0x21b fs/dlm/lowcomms.c:1455
Code: 89 ee 48 c7 c7 00 eb eb 8b e8 8f 61 fc ff e8 da f8 ff ff 31 f6 89 ef 41 89 c4 e8 9e 0f a1 01 48 85 c0 75 1b e8 d4 77 e4 00 90 <0f> 0b 90 44 89 e7 bb fe ff ff ff e8 43 f8 ff ff e9 b5 01 00 00 48
RSP: 0018:ffffc9000383fbd8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff82c6f9c4
RDX: ffff888033a52540 RSI: ffffffff8125e92c RDI: ffff888033a52540
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000001 R14: ffffed1005244e10 R15: 0000000000000001
FS: 0000555565d9e500(0000) GS:ffff8880d5eda000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33163fff CR3: 000000002cf16000 CR4: 0000000000352ef0
Call Trace:
<TASK>
dlm_midcomms_close+0x312/0x590 fs/dlm/midcomms.c:1443
drop_comm+0x62/0x1a0 fs/dlm/config.c:556
client_drop_item+0xa6/0x100 fs/configfs/dir.c:970
configfs_rmdir+0x5d3/0x950 fs/configfs/dir.c:1567
vfs_rmdir fs/namei.c:5381 [inline]
vfs_rmdir+0x328/0x8a0 fs/namei.c:5354
filename_rmdir+0x31a/0x5c0 fs/namei.c:5438
__do_sys_rmdir fs/namei.c:5461 [inline]
__se_sys_rmdir fs/namei.c:5458 [inline]
__x64_sys_rmdir+0x46/0x70 fs/namei.c:5458
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa842f9e019
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:00007ffc8c738bb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 00007fa843225fa0 RCX: 00007fa842f9e019
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000040
RBP: 00007fa84303500c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa843225fac R14: 00007fa843225fa0 R15: 00007fa843225fa0
</TASK>


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