=====================================
WARNING: bad unlock balance detected!
5.19.0-rc2-syzkaller #0 Not tainted
-------------------------------------
syz-executor.0/4105 is trying to release lock (&call->user_mutex) at:
[<ffffffff87b45521>] rxrpc_do_sendmsg+0x851/0x1110 net/rxrpc/sendmsg.c:754
but there are no more locks to release!

other info that might help us debug this:
no locks held by syz-executor.0/4105.

stack backtrace:
CPU: 1 PID: 4105 Comm: syz-executor.0 Not tainted 5.19.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x57/0x7d lib/dump_stack.c:106
 print_unlock_imbalance_bug include/trace/events/lock.h:69 [inline]
 __lock_release kernel/locking/lockdep.c:5332 [inline]
 lock_release.cold+0x49/0x4e kernel/locking/lockdep.c:5685
 __mutex_unlock_slowpath+0x99/0x5e0 kernel/locking/mutex.c:907
 rxrpc_do_sendmsg+0x851/0x1110 net/rxrpc/sendmsg.c:754
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg+0xab/0xe0 net/socket.c:734
 ____sys_sendmsg+0x5c2/0x7a0 net/socket.c:2492
 ___sys_sendmsg+0xd3/0x150 net/socket.c:2546
 __sys_sendmsg+0xb9/0x150 net/socket.c:2575
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f8e818890e9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8e82a66168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f8e8199bf60 RCX: 00007f8e818890e9
RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003
RBP: 00007f8e818e308d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff0a025d9f R14: 00007f8e82a66300 R15: 0000000000022000
 </TASK>