------------[ cut here ]------------
WARNING: CPU: 1 PID: 22235 at net/kcm/kcmsock.c:630 kcm_write_msgs+0x887/0x1770 net/kcm/kcmsock.c:630
Modules linked in:
CPU: 1 UID: 0 PID: 22235 Comm: syz-executor240 Not tainted 6.15.0-syzkaller-01958-g785cdec46e92 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:kcm_write_msgs+0x887/0x1770 net/kcm/kcmsock.c:630
Code: 07 48 c1 ea 03 0f b6 04 02 38 c8 7f 08 84 c0 0f 85 80 0e 00 00 41 c6 47 34 01 4c 89 7c 24 20 e9 7c f9 ff ff e8 1a ab 17 f7 90 <0f> 0b 90 41 bd ea ff ff ff e8 0b ab 17 f7 e8 06 ab 17 f7 48 8b 44
RSP: 0018:ffffc90024b3f8e0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88804608e200 RCX: ffffffff8aa39f3c
RDX: ffff888048a8a440 RSI: ffffffff8aa3a526 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000
R13: 0000000000011000 R14: ffff88803a4082c0 R15: ffff8880323d3900
FS:  00007f1c3edd66c0(0000) GS:ffff8880d6aa6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000330000 CR3: 00000000319f6000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kcm_sendmsg+0x2592/0x2ca0 net/kcm/kcmsock.c:907
 sock_sendmsg_nosec net/socket.c:712 [inline]
 __sock_sendmsg net/socket.c:727 [inline]
 sock_write_iter+0x4fc/0x5b0 net/socket.c:1131
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x6c7/0x1150 fs/read_write.c:686
 ksys_write+0x1f8/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1c3f64cf69
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 1f 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1c3edd6218 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f1c3f6d3418 RCX: 00007f1c3f64cf69
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007f1c3f6d3410 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f1c3f69ee04
R13: 00002000000001c0 R14: 0000200000000000 R15: 00002000000007c0
 </TASK>