------------[ cut here ]------------
WARNING: CPU: 1 PID: 5426 at net/kcm/kcmsock.c:533 spin_unlock_bh include/linux/spinlock.h:395 [inline]
WARNING: CPU: 1 PID: 5426 at net/kcm/kcmsock.c:533 unreserve_psock+0x2a5/0x610 net/kcm/kcmsock.c:567
Modules linked in:
CPU: 1 PID: 5426 Comm: syz-executor.0 Not tainted 6.4.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
RIP: 0010:unreserve_psock+0x2a5/0x610 net/kcm/kcmsock.c:533
Code: 00 0f b6 85 84 01 00 00 a8 01 75 29 48 89 ef e8 c1 b2 ff ff 48 83 c4 08 4c 89 f7 5b 5d 41 5c 41 5d 41 5e 41 5f e9 4b fb bd 00 <0f> 0b eb e6 0f 0b e9 21 ff ff ff a8 02 74 db 4c 8d ad a0 01 00 00
RSP: 0018:ffffc900044df6a0 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff888077618000 RCX: ffffffff815d61f4
RDX: 1ffff1100eec30b3 RSI: 0000000000000004 RDI: ffffc900044df630
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000003
R10: fffff5200089bec6 R11: 1ffffffff1f6a3a0 R12: ffff8880730f8000
R13: ffff888077618288 R14: ffff8880730f81c0 R15: ffff888077618598
FS:  00007f8ffc49d700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200006c0 CR3: 0000000072fbf000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kcm_write_msgs+0x4bd/0x1470 net/kcm/kcmsock.c:699
 kcm_sendmsg+0x1222/0x27b0 net/kcm/kcmsock.c:903
 sock_sendmsg_nosec net/socket.c:724 [inline]
 sock_sendmsg+0xc0/0x150 net/socket.c:747
 ____sys_sendmsg+0x38e/0x880 net/socket.c:2493
 ___sys_sendmsg+0xdb/0x160 net/socket.c:2547
 __sys_sendmmsg+0x13e/0x300 net/socket.c:2633
 __do_sys_sendmmsg net/socket.c:2662 [inline]
 __se_sys_sendmmsg net/socket.c:2659 [inline]
 __x64_sys_sendmmsg+0x98/0x100 net/socket.c:2659
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f8ffb68c199
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:00007f8ffc49d168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f8ffb7abf80 RCX: 00007f8ffb68c199
RDX: 0000000000000001 RSI: 00000000200006c0 RDI: 0000000000000003
RBP: 00007f8ffb6e7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffde3dc1f2f R14: 00007f8ffc49d300 R15: 0000000000022000
 </TASK>