------------[ cut here ]------------
WARNING: CPU: 1 PID: 5240 at net/kcm/kcmsock.c:630 kcm_write_msgs+0x982/0x1690 net/kcm/kcmsock.c:630
Modules linked in:
CPU: 1 PID: 5240 Comm: syz-executor158 Not tainted 6.8.0-rc1-syzkaller-00049-g6098d87eaf31 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:kcm_write_msgs+0x982/0x1690 net/kcm/kcmsock.c:630
Code: 48 c1 e8 03 42 0f b6 04 20 38 c8 7f 08 84 c0 0f 85 c1 0a 00 00 41 c6 47 34 01 4c 89 7c 24 20 e9 93 f8 ff ff e8 6f f9 cc f7 90 <0f> 0b 90 41 bd ea ff ff ff e8 60 f9 cc f7 e9 f4 fb ff ff e8 56 f9
RSP: 0018:ffffc900046d78c8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff89bb2227
RDX: ffff8880201d3b80 RSI: ffffffff89bb28f1 RDI: 0000000000000001
RBP: ffff8880788fc740 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000088000 R14: ffff88802d88aec0 R15: ffff88806fd3d140
FS:  00007f83269e96c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020d10000 CR3: 0000000069fca000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 kcm_sendmsg+0x226f/0x28d0 net/kcm/kcmsock.c:905
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0xd5/0x180 net/socket.c:745
 sock_write_iter+0x29b/0x3d0 net/socket.c:1160
 call_write_iter include/linux/fs.h:2085 [inline]
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0x6d5/0x1100 fs/read_write.c:590
 ksys_write+0x1f0/0x250 fs/read_write.c:643
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f8326a2c979
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 1a 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:00007f83269e9218 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f8326ab7428 RCX: 00007f8326a2c979
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 00007f8326ab7420 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8326a84374
R13: 00007f8326a83620 R14: 00000000200011c0 R15: 656c6c616b7a7973
 </TASK>