------------[ cut here ]------------
'send_pkt()' returns 0, but 65536 expected
WARNING: CPU: 0 PID: 7576 at net/vmw_vsock/virtio_transport_common.c:426 virtio_transport_send_pkt_info+0x730/0xc04 net/vmw_vsock/virtio_transport_common.c:426
Modules linked in:
CPU: 0 UID: 0 PID: 7576 Comm: syz.1.1311 Not tainted syzkaller #0 PREEMPT 
Hardware name: linux,dummy-virt (DT)
pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : virtio_transport_send_pkt_info+0x730/0xc04 net/vmw_vsock/virtio_transport_common.c:426
lr : virtio_transport_send_pkt_info+0x730/0xc04 net/vmw_vsock/virtio_transport_common.c:426
sp : ffff8000a17574b0
x29: ffff8000a17574b0 x28: ffff0000197f4c00 x27: dfff800000000000
x26: ffff000025603300 x25: ffff0000197f4c48 x24: ffff000024482780
x23: ffff000022291a40 x22: 0000000000010000 x21: ffff800088b3d720
x20: ffff8000a17575d0 x19: 0000000000010000 x18: 0000000000000000
x17: 0000000000000000 x16: ffff00006a08a4c4 x15: 0000ffffdd0c4818
x14: 0000000000000000 x13: 0000000000000000 x12: ffff7000142eadff
x11: 1ffff000142eadfe x10: ffff7000142eadfe x9 : dfff800000000000
x8 : ffff8000a1756ff8 x7 : ffff8000a1757120 x6 : ffff8000a1757070
x5 : ffff8000a1757058 x4 : 1ffff000142eae14 x3 : 1fffe0000d41313e
x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff00001493dac0
Call trace:
 virtio_transport_send_pkt_info+0x730/0xc04 net/vmw_vsock/virtio_transport_common.c:426 (P)
 virtio_transport_stream_enqueue net/vmw_vsock/virtio_transport_common.c:1111 [inline]
 virtio_transport_seqpacket_enqueue+0x104/0x164 net/vmw_vsock/virtio_transport_common.c:839
 vsock_connectible_sendmsg+0x960/0xcf4 net/vmw_vsock/af_vsock.c:2141
 sock_sendmsg_nosec net/socket.c:714 [inline]
 __sock_sendmsg+0xc8/0x168 net/socket.c:729
 ____sys_sendmsg+0x3ac/0x764 net/socket.c:2614
 ___sys_sendmsg+0x11c/0x19c net/socket.c:2668
 __sys_sendmmsg+0x1b0/0x424 net/socket.c:2757
 __do_sys_sendmmsg net/socket.c:2784 [inline]
 __se_sys_sendmmsg net/socket.c:2781 [inline]
 __arm64_sys_sendmmsg+0x8c/0xd0 net/socket.c:2781
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x6c/0x258 arch/arm64/kernel/syscall.c:49
 el0_svc_common.constprop.0+0xac/0x230 arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x40/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x50/0x1a0 arch/arm64/kernel/entry-common.c:879
 el0t_64_sync_handler+0xa0/0xe4 arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
irq event stamp: 0
hardirqs last  enabled at (0): [<0000000000000000>] 0x0
hardirqs last disabled at (0): [<ffff80008019ecdc>] copy_process+0x1394/0x53f4 kernel/fork.c:2115
softirqs last  enabled at (0): [<ffff80008019ed14>] copy_process+0x13cc/0x53f4 kernel/fork.c:2119
softirqs last disabled at (0): [<0000000000000000>] 0x0
---[ end trace 0000000000000000 ]---