------------[ cut here ]------------
WARNING: CPU: 1 PID: 5493 at net/kcm/kcmsock.c:630 kcm_write_msgs+0x141b/0x15c0 net/kcm/kcmsock.c:630
Modules linked in:
CPU: 1 PID: 5493 Comm: syz-executor.0 Not tainted 6.9.0-syzkaller-10323-g8f6a15f095a6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:kcm_write_msgs+0x141b/0x15c0 net/kcm/kcmsock.c:630
Code: cb 6f f1 f6 4d 85 f6 74 60 e8 c1 6f f1 f6 48 8b 5c 24 30 48 89 df e8 54 9e ff ff eb 56 e8 ad 6f f1 f6 eb 4a e8 a6 6f f1 f6 90 <0f> 0b 90 41 bd ea ff ff ff 49 bc 00 00 00 00 00 fc ff df eb 2f e8
RSP: 0018:ffffc900030ef6e0 EFLAGS: 00010283
RAX: ffffffff8aa4c15a RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc9000b347000 RSI: 000000000003311b RDI: 000000000003311c
RBP: ffffc900030ef8d0 R08: ffffffff8aa4b6c7 R09: 0000000000000000
R10: ffffc900030ef7e0 R11: fffff5200061df09 R12: 0000000000000140
R13: ffff888027197e8c R14: ffff88802e08eb42 R15: ffff88802e08ea00
FS:  00007f69111e06c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdfcb495070 CR3: 0000000017f92000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kcm_sendmsg+0x21b7/0x27c0 net/kcm/kcmsock.c:906
 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:2114 [inline]
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0xa72/0xc90 fs/read_write.c:590
 ksys_write+0x1a0/0x2c0 fs/read_write.c:643
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f691047cee9
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:00007f69111e00c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f69105ac120 RCX: 00007f691047cee9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00007f69104c949e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f69105ac120 R15: 00007ffde9455c38
 </TASK>