------------[ cut here ]------------
'send_pkt()' returns 0, but 65536 expected
WARNING: net/vmw_vsock/virtio_transport_common.c:428 at virtio_transport_send_pkt_info+0xd11/0xf00 net/vmw_vsock/virtio_transport_common.c:426, CPU#1: syz.2.587/7771
Modules linked in:
CPU: 1 UID: 0 PID: 7771 Comm: syz.2.587 Not tainted 6.16.0-next-20250808-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:virtio_transport_send_pkt_info+0xd11/0xf00 net/vmw_vsock/virtio_transport_common.c:426
Code: 0f 0b 90 bd f2 ff ff ff eb bc e8 0a bb 5d f6 c6 05 c7 7a 6c 04 01 90 48 c7 c7 c0 67 da 8c 44 89 f6 4c 89 ea e8 60 51 21 f6 90 <0f> 0b 90 90 e9 e1 fe ff ff e8 e1 ba 5d f6 90 0f 0b 90 e9 c5 f7 ff
RSP: 0018:ffffc90003087530 EFLAGS: 00010246
RAX: 2e1af04d27bf7c00 RBX: 0000000000010000 RCX: 0000000000080000
RDX: ffffc9000c2c3000 RSI: 000000000000abb7 RDI: 000000000000abb8
RBP: ffffffff8fc8be10 R08: ffff8880b8724253 R09: 1ffff110170e484a
R10: dffffc0000000000 R11: ffffed10170e484b R12: dffffc0000000000
R13: 0000000000010000 R14: 0000000000000000 R15: ffff88805ce32da4
FS:  00007f204f9116c0(0000) GS:ffff8881258db000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001000 CR3: 000000007b4c4000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 virtio_transport_stream_enqueue net/vmw_vsock/virtio_transport_common.c:1111 [inline]
 virtio_transport_seqpacket_enqueue+0x143/0x1c0 net/vmw_vsock/virtio_transport_common.c:839
 vsock_connectible_sendmsg+0xac7/0x1050 net/vmw_vsock/af_vsock.c:2140
 sock_sendmsg_nosec net/socket.c:714 [inline]
 __sock_sendmsg+0x21c/0x270 net/socket.c:729
 ____sys_sendmsg+0x52d/0x830 net/socket.c:2614
 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2668
 __sys_sendmmsg+0x227/0x430 net/socket.c:2757
 __do_sys_sendmmsg net/socket.c:2784 [inline]
 __se_sys_sendmmsg net/socket.c:2781 [inline]
 __x64_sys_sendmmsg+0xa0/0xc0 net/socket.c:2781
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f204eb8ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f204f911038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f204edb5fa0 RCX: 00007f204eb8ebe9
RDX: 0000000000000001 RSI: 0000200000000100 RDI: 0000000000000004
RBP: 00007f204ec11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000024008094 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f204edb6038 R14: 00007f204edb5fa0 R15: 00007ffe028441f8
 </TASK>