------------[ cut here ]------------
WARNING: CPU: 1 PID: 15452 at net/kcm/kcmsock.c:630 kcm_write_msgs+0x989/0x1690 net/kcm/kcmsock.c:630
Modules linked in:
CPU: 1 PID: 15452 Comm: syz-executor.4 Not tainted 6.8.0-rc1-syzkaller-00228-gb59af3045a66 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:kcm_write_msgs+0x989/0x1690 net/kcm/kcmsock.c:630
Code: 48 c1 e8 03 42 0f b6 04 20 38 c8 7f 08 84 c0 0f 85 c4 0a 00 00 41 c6 47 34 01 4c 89 7c 24 20 e9 8c f8 ff ff e8 38 f5 9e f7 90 <0f> 0b 90 41 bd ea ff ff ff e8 29 f5 9e f7 e9 ed fb ff ff e8 1f f5
RSP: 0018:ffffc900038d78f0 EFLAGS: 00010287
RAX: 0000000000023eed RBX: 0000000000000000 RCX: ffffc90005942000
RDX: 0000000000040000 RSI: ffffffff89ed7268 RDI: 0000000000000001
RBP: ffff8880234fa540 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000088000 R14: ffff8880253f98c0 R15: ffff888029f00c80
FS:  00007f9990d946c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f077c4d66e4 CR3: 000000001ec08000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kcm_sendmsg+0x228e/0x2900 net/kcm/kcmsock.c:905
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 sock_write_iter+0x50a/0x5c0 net/socket.c:1160
 call_write_iter include/linux/fs.h:2085 [inline]
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0x6de/0x1110 fs/read_write.c:590
 ksys_write+0x1f8/0x260 fs/read_write.c:643
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd5/0x270 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f999007dda9
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:00007f9990d940c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f99901abf80 RCX: 00007f999007dda9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00007f99900ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f99901abf80 R15: 00007fff2f71e308
 </TASK>