------------[ cut here ]------------
'send_pkt()' returns 0, but 65536 expected
WARNING: CPU: 0 PID: 9844 at net/vmw_vsock/virtio_transport_common.c:428 virtio_transport_send_pkt_info+0xac4/0xc60 net/vmw_vsock/virtio_transport_common.c:426
Modules linked in:
CPU: 0 UID: 0 PID: 9844 Comm: syz.1.618 Not tainted 6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/18/2025
pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : virtio_transport_send_pkt_info+0xac4/0xc60 net/vmw_vsock/virtio_transport_common.c:426
lr : virtio_transport_send_pkt_info+0xac4/0xc60 net/vmw_vsock/virtio_transport_common.c:426
sp : ffff80009d6b73a0
x29: ffff80009d6b7420 x28: ffff800092d9a390 x27: 0000000000010000
x26: ffff80009d6b74a0 x25: dfff800000000000 x24: ffff0000f4437400
x23: 0000000000000000 x22: 0000000000010000 x21: 0000000000040000
x20: ffff80009d6b74b0 x19: ffff800092df6000 x18: 1fffe0003379be88
x17: ffff80008f7be000 x16: ffff80008b007230 x15: 0000000000000001
x14: 1fffe0001d1a4940 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000080000 x10: 0000000000000003 x9 : 021a3c2508996700
x8 : 021a3c2508996700 x7 : ffff800080491074 x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff800080483608
x2 : 0000000000000001 x1 : ffff80008b6577c0 x0 : 0000000000000001
Call trace:
 virtio_transport_send_pkt_info+0xac4/0xc60 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+0x114/0x184 net/vmw_vsock/virtio_transport_common.c:839
 vsock_connectible_sendmsg+0x780/0xc40 net/vmw_vsock/af_vsock.c:2140
 sock_sendmsg_nosec net/socket.c:714 [inline]
 __sock_sendmsg net/socket.c:729 [inline]
 ____sys_sendmsg+0x490/0x7b8 net/socket.c:2614
 ___sys_sendmsg+0x204/0x278 net/socket.c:2668
 __sys_sendmmsg+0x1f4/0x548 net/socket.c:2757
 __do_sys_sendmmsg net/socket.c:2784 [inline]
 __se_sys_sendmmsg net/socket.c:2781 [inline]
 __arm64_sys_sendmmsg+0xa0/0xbc net/socket.c:2781
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
irq event stamp: 1954
hardirqs last  enabled at (1953): [<ffff800080491108>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1531 [inline]
hardirqs last  enabled at (1953): [<ffff800080491108>] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:5105
hardirqs last disabled at (1954): [<ffff80008b001bfc>] el1_brk64+0x1c/0x48 arch/arm64/kernel/entry-common.c:574
softirqs last  enabled at (1940): [<ffff80008ae6731c>] spin_unlock_bh include/linux/spinlock.h:396 [inline]
softirqs last  enabled at (1940): [<ffff80008ae6731c>] virtio_vsock_skb_queue_tail include/linux/virtio_vsock.h:107 [inline]
softirqs last  enabled at (1940): [<ffff80008ae6731c>] vsock_loopback_send_pkt+0xd0/0x100 net/vmw_vsock/vsock_loopback.c:34
softirqs last disabled at (1938): [<ffff80008ae672a4>] spin_lock_bh include/linux/spinlock.h:356 [inline]
softirqs last disabled at (1938): [<ffff80008ae672a4>] virtio_vsock_skb_queue_tail include/linux/virtio_vsock.h:105 [inline]
softirqs last disabled at (1938): [<ffff80008ae672a4>] vsock_loopback_send_pkt+0x58/0x100 net/vmw_vsock/vsock_loopback.c:34
---[ end trace 0000000000000000 ]---