------------[ cut here ]------------
WARNING: CPU: 1 PID: 27928 at net/kcm/kcmsock.c:630 kcm_write_msgs+0x13b0/0x1530 net/kcm/kcmsock.c:630
Modules linked in:
CPU: 1 PID: 27928 Comm: syz-executor.4 Not tainted 6.8.0-rc2-syzkaller-00679-g3907f1ffc0ec #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:kcm_write_msgs+0x13b0/0x1530 net/kcm/kcmsock.c:630
Code: f7 48 8b 5c 24 28 48 89 df e8 ec 9e ff ff eb 48 e8 f5 dd 02 f7 45 31 f6 45 31 ed eb b9 e8 e8 dd 02 f7 eb 2f e8 e1 dd 02 f7 90 <0f> 0b 90 eb 09 e8 d6 dd 02 f7 90 0f 0b 90 41 bd ea ff ff ff eb 13
RSP: 0018:ffffc90012a876c0 EFLAGS: 00010293
RAX: ffffffff8a90896f RBX: 0000000000000000 RCX: ffff88802340d940
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90012a878b0 R08: ffffffff8a907ddb R09: 0000000000000000
R10: ffffc90012a877c0 R11: fffff52002550f05 R12: dffffc0000000000
R13: ffff88801e083ad0 R14: ffff88801e083a00 R15: ffff88801e083acc
FS:  00007f6ee2f356c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f113b302423 CR3: 00000000163f6000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kcm_sendmsg+0x21bf/0x27d0 net/kcm/kcmsock.c:905
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 sock_write_iter+0x2dd/0x400 net/socket.c:1160
 call_write_iter include/linux/fs.h:2085 [inline]
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0xa81/0xcb0 fs/read_write.c:590
 ksys_write+0x1a0/0x2c0 fs/read_write.c:643
 do_syscall_64+0xf9/0x240
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f6ee227dda9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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:00007f6ee2f350c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f6ee23ac120 RCX: 00007f6ee227dda9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 00007f6ee22ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f6ee23ac120 R15: 00007ffc269f0438
 </TASK>