------------[ cut here ]------------
WARNING: CPU: 1 PID: 8512 at net/kcm/kcmsock.c:630 kcm_write_msgs+0x141b/0x15c0 net/kcm/kcmsock.c:630
Modules linked in:
CPU: 1 PID: 8512 Comm: syz-executor424 Not tainted 6.9.0-next-20240521-syzkaller #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: 0b 4d e6 f6 4d 85 f6 74 60 e8 01 4d e6 f6 48 8b 5c 24 30 48 89 df e8 54 9e ff ff eb 56 e8 ed 4c e6 f6 eb 4a e8 e6 4c e6 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:ffffc9000a8376e0 EFLAGS: 00010293
RAX: ffffffff8ab018ca RBX: 0000000000000000 RCX: ffff88801e819e00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000a8378d0 R08: ffffffff8ab00e37 R09: 0000000000000000
R10: ffffc9000a8377e0 R11: fffff52001506f09 R12: 0000000000000140
R13: ffff88802d8afd4c R14: ffff888022c09642 R15: ffff888022c09500
FS:  00007fbe85d8d6c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002022a000 CR3: 00000000664e8000 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
 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: 0033:0x7fbe85dd7799
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 a1 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:00007fbe85d8d218 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fbe85e63428 RCX: 00007fbe85dd7799
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 00007fbe85e63420 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fbe85e2f3ac
R13: 00007fbe85e2e658 R14: 00000000200011c0 R15: 656c6c616b7a7973
 </TASK>