------------[ cut here ]------------
WARNING: CPU: 1 PID: 6344 at net/kcm/kcmsock.c:630 kcm_write_msgs+0x1436/0x15d0 net/kcm/kcmsock.c:630
Modules linked in:
CPU: 1 UID: 0 PID: 6344 Comm: syz-executor.0 Not tainted 6.12.0-syzkaller-10689-g7af08b57bcb9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:kcm_write_msgs+0x1436/0x15d0 net/kcm/kcmsock.c:630
Code: 40 c0 aa f6 4d 85 f6 74 60 e8 36 c0 aa f6 48 8b 5c 24 30 48 89 df e8 59 9e ff ff eb 56 e8 22 c0 aa f6 eb 4a e8 1b c0 aa 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:ffffc90004a5f700 EFLAGS: 00010293
RAX: ffffffff8aeb2165 RBX: 0000000000000000 RCX: ffff888025b00000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90004a5f8f0 R08: ffffffff8aeb16b7 R09: 0000000000000000
R10: ffffc90004a5f800 R11: fffff5200094bf0d R12: 0000000000000140
R13: ffff8880325ee5cc R14: ffff8880124f9c42 R15: ffff8880124f9b00
FS:  00007fbc8ef2e6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020229000 CR3: 000000003388e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kcm_sendmsg+0x23d8/0x2a50 net/kcm/kcmsock.c:907
 sock_sendmsg_nosec net/socket.c:711 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:726
 sock_write_iter+0x2d7/0x3f0 net/socket.c:1147
 new_sync_write fs/read_write.c:586 [inline]
 vfs_write+0xaeb/0xd30 fs/read_write.c:679
 ksys_write+0x18f/0x2b0 fs/read_write.c:731
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbc8e27dca9
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:00007fbc8ef2e0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fbc8e3abf80 RCX: 00007fbc8e27dca9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 00007fbc8e2c947e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fbc8e3abf80 R15: 00007ffed02091b8
 </TASK>