------------[ cut here ]------------
WARNING: CPU: 1 PID: 20599 at net/kcm/kcmsock.c:630 kcm_write_msgs+0x13b0/0x1530 net/kcm/kcmsock.c:630
Modules linked in:
CPU: 1 PID: 20599 Comm: syz-executor.4 Not tainted 6.8.0-rc7-syzkaller-00125-gdf4793505abd #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 45 25 03 f7 45 31 f6 45 31 ed eb b9 e8 38 25 03 f7 eb 2f e8 31 25 03 f7 90 <0f> 0b 90 eb 09 e8 26 25 03 f7 90 0f 0b 90 41 bd ea ff ff ff eb 13
RSP: 0018:ffffc900141a76c0 EFLAGS: 00010287
RAX: ffffffff8a9049cf RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc90009f29000 RSI: 0000000000011652 RDI: 0000000000011653
RBP: ffffc900141a78b0 R08: ffffffff8a903e3b R09: 0000000000000000
R10: ffffc900141a77c0 R11: fffff52002834f05 R12: dffffc0000000000
R13: ffff88804995f350 R14: ffff88804995f280 R15: ffff88804995f34c
FS:  00007fdc619cd6c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31e28000 CR3: 0000000024c5a000 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:2087 [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: 0033:0x7fdc60c7dda9
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:00007fdc619cd0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fdc60dabf80 RCX: 00007fdc60c7dda9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000007
RBP: 00007fdc60cca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fdc60dabf80 R15: 00007ffd69019fe8
 </TASK>