------------[ cut here ]------------
'send_pkt()' returns 0, but 65536 expected
WARNING: CPU: 1 PID: 14300 at net/vmw_vsock/virtio_transport_common.c:428 virtio_transport_send_pkt_info+0xd11/0xf00
Modules linked in:
CPU: 1 UID: 0 PID: 14300 Comm: syz.4.2896 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:virtio_transport_send_pkt_info+0xd11/0xf00
Code: 0f 0b 90 bd f2 ff ff ff eb bc e8 7a 16 66 f6 c6 05 6d f5 33 04 01 90 48 c7 c7 a0 c4 b8 8c 44 89 f6 4c 89 ea e8 00 b5 29 f6 90 <0f> 0b 90 90 e9 e1 fe ff ff e8 51 16 66 f6 90 0f 0b 90 e9 c5 f7 ff
RSP: 0018:ffffc90006c97530 EFLAGS: 00010246
RAX: 3474e425be490300 RBX: 0000000000010000 RCX: 0000000000080000
RDX: ffffc900083ba000 RSI: 0000000000008734 RDI: 0000000000008735
RBP: ffffffff8f8783d0 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfa1ec R12: dffffc0000000000
R13: 0000000000010000 R14: 0000000000000000 R15: ffff88811ea5c3a4
FS:  00007fae69d9d6c0(0000) GS:ffff8881a3c1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000003f000 CR3: 000000002a1a8000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 virtio_transport_seqpacket_enqueue+0x143/0x1c0
 vsock_connectible_sendmsg+0xac7/0x1050
 __sock_sendmsg+0x21c/0x270
 ____sys_sendmsg+0x52d/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __sys_sendmmsg+0x227/0x430
 __x64_sys_sendmmsg+0xa0/0xc0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fae68f8ebe9
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:00007fae69d9d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007fae691c5fa0 RCX: 00007fae68f8ebe9
RDX: 0000000000000001 RSI: 0000200000000100 RDI: 0000000000000004
RBP: 00007fae69011e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000024008094 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fae691c6038 R14: 00007fae691c5fa0 R15: 00007ffce9856568
 </TASK>
