'send_pkt()' returns 0, but 28244 expected WARNING: CPU: 0 PID: 483 at net/vmw_vsock/virtio_transport_common.c:446 virtio_transport_send_pkt_info+0xe81/0x10c0 net/vmw_vsock/virtio_transport_common.c:444 Modules linked in: CPU: 0 UID: 0 PID: 483 Comm: syz.2.17 Not tainted syzkaller #0 1dd6a21c82f6584d19072981994c4b0df2839349 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:virtio_transport_send_pkt_info+0xe81/0x10c0 net/vmw_vsock/virtio_transport_common.c:444 Code: fe 08 fc 0f 0b bb f2 ff ff ff eb b5 e8 28 fe 08 fc c6 05 3a bf 46 02 01 48 c7 c7 e0 83 79 86 44 89 f6 4c 89 e2 e8 1f 5a 87 fb <0f> 0b e9 de fe ff ff e8 03 fe 08 fc 0f 0b e9 c6 f6 ff ff 89 d9 80 RSP: 0018:ffffc9000112f550 EFLAGS: 00010246 RAX: 994b3302a6afe300 RBX: ffffffff87c11cb0 RCX: ffff88811d1d1300 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002 RBP: ffffc9000112f630 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff52000225e54 R12: 0000000000006e54 R13: 0000000000008d60 R14: 0000000000000000 R15: ffffc9000112f680 FS: 00007f6577e826c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000003f000 CR3: 000000011cdf8000 CR4: 00000000003526b0 Call Trace: virtio_transport_stream_enqueue net/vmw_vsock/virtio_transport_common.c:1129 [inline] virtio_transport_seqpacket_enqueue+0x141/0x1c0 net/vmw_vsock/virtio_transport_common.c:857 vsock_connectible_sendmsg+0xb1a/0x10c0 net/vmw_vsock/af_vsock.c:2056 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0xa18/0xa70 net/socket.c:2610 ___sys_sendmsg+0x220/0x2a0 net/socket.c:2664 __sys_sendmmsg+0x271/0x470 net/socket.c:2750 __do_sys_sendmmsg net/socket.c:2779 [inline] __se_sys_sendmmsg net/socket.c:2776 [inline] __x64_sys_sendmmsg+0xa4/0xc0 net/socket.c:2776 x64_sys_call+0xfec/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:308 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7f6576f8ebe9 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:00007f6577e82038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f65771b5fa0 RCX: 00007f6576f8ebe9 RDX: 0000000000000001 RSI: 0000200000000100 RDI: 0000000000000004 RBP: 00007f6577011e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000024008094 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f65771b6038 R14: 00007f65771b5fa0 R15: 00007fffbc986748 ---[ end trace 0000000000000000 ]---