------------[ cut here ]------------
WARNING: CPU: 1 PID: 5990 at net/kcm/kcmsock.c:630 kcm_write_msgs+0x887/0x1770 net/kcm/kcmsock.c:630
Modules linked in:
CPU: 1 UID: 0 PID: 5990 Comm: syz-executor516 Not tainted 6.15.0-rc1-syzkaller-00060-ga24588245776 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
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 6a d3 1e f7 90 <0f> 0b 90 41 bd ea ff ff ff e8 5b d3 1e f7 e8 56 d3 1e f7 48 8b 44
RSP: 0018:ffffc900043a78e0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888033a93c00 RCX: ffffffff8a9c643c
RDX: ffff88801bfb4880 RSI: ffffffff8a9c6a26 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000088000 R14: ffff888030a2b9c0 R15: ffff888034bbb640
FS:  00007ff7777586c0(0000) GS:ffff888124ab3000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000001e9000 CR3: 0000000025f9c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kcm_sendmsg+0x2576/0x2c60 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:591 [inline]
 vfs_write+0x5ba/0x1180 fs/read_write.c:684
 ksys_write+0x205/0x240 fs/read_write.c:736
 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: 0033:0x7ff7777a4199
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 91 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:00007ff777758218 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ff777830428 RCX: 00007ff7777a4199
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 00007ff777830420 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff7777fc24c
R13: 0000200000002800 R14: 0000200000002950 R15: 0000200000002940
 </TASK>