vtnet broken on -CURRENT when using VirtualBox

[Bryan Venteicher]

----- Original Message -----
> Hi list,
> I'm observing a 100%-reproducible panic in the following setup:
> 
> Host system: FreeBSD 9.1-RELEASE-p7 amd64
> $ pkg info | grep virtualbox
> virtualbox-ose-4.2.18_1        A general-purpose full virtualizer for
> x86 hardware
> virtualbox-ose-kmod-4.2.18     VirtualBox kernel module for FreeBSD
> 
> System in a virtual machine: FreeBSD-CURRENT SVN rev 259064.
> Virtual machine is created with virtio host-only adapter.
> 
> When trying to ssh into VM, the system in VM panics with the following
> message:
> 
> panic: vtnet_txq_offload: mbuf 0xc309e900 TSO without checksum offload
> KDB: stack backtrace:
> db_trace_self_wrapper(c0b4fd4d,a6461,65393030,63333039,c13a29c0,...) at
> db_trace_self_wrapper+0x2d/frame 0xc23f85a0
> kdb_backtrace(c0b4b145,c0c29a7c,c0b9b43d,c23f865c,c23f865c,...) at
> kdb_backtrace+0x30/frame 0xc23f8608
> vpanic(c0c29918,100,c0b9b43d,c23f865c,c23f865c,...) at vpanic+0x80/frame
> 0xc23f862c
> kassert_panic(c0b9b43d,c0b9b466,c309e900,8b1,c0dad504,...) at
> kassert_panic+0xe9/frame 0xc23f8650
> vtnet_txq_mq_start_locked(c2e02810,0,c0b9b369,8ea,c2e02810,...) at
> vtnet_txq_mq_start_locked+0x62b/frame 0xc23f8808
> vtnet_txq_mq_start(c2cf7800,c309e900,6,c23f89e0,c23f8866,...) at
> vtnet_txq_mq_start+0x76/frame 0xc23f8834
> ether_output(c2cf7800,c309e900,c23f89e0,c23f89d0,c36639d8,...) at
> ether_output+0x64b/frame 0xc23f8888
> ip_output(c309e900,0,c23f89d0,0,0,...) at ip_output+0x173f/frame 0xc23f8938
> tcp_output(c36665e0,c342f400,32c,1,c36639d8,...) at
> tcp_output+0x1cbf/frame 0xc23f8a9c
> tcp_usr_send(c3410d40,0,c342f400,0,0,...) at tcp_usr_send+0x346/frame
> 0xc23f8ad0
> sosend_generic(c3410d40,0,c23f8c10,0,0,...) at
> sosend_generic+0x3b3/frame 0xc23f8b40
> soo_write(c3142f50,c23f8c10,c2cf0d00,0,c3108620,...) at
> soo_write+0x5d/frame 0xc23f8b70
> dofilewrite(c3142f50,c23f8c10,ffffffff,ffffffff,0,...) at
> dofilewrite+0x86/frame 0xc23f8ba8
> kern_writev(c3108620,3,c23f8c10,0,28c4d608,...) at
> kern_writev+0x96/frame 0xc23f8bf0
> sys_write(c3108620,c23f8cc8,c23f8c98,c076b3a4,c0c36e90,...) at
> sys_write+0x5c/frame 0xc23f8c40
> syscall(c23f8d08) at syscall+0x2de/frame 0xc23f8cfc
> Xint0x80_syscall() at Xint0x80_syscall+0x21/frame 0xc23f8cfc
> --- syscall (4, FreeBSD ELF32, sys_write), eip = 0x2840dd77, esp =
> 0xbfbfb328, ebp = 0xbfbfb348 ---
> KDB: enter: panic
> [ thread pid 1570 tid 100065 ]
> Stopped at      kdb_enter+0x3d: movl    $0,kdb_why
> db>
> 
> 
> Please help me to debug this.
> 

I suspect I know what is wrong. What's the output of `ifconfig vtnetX`?

> --
> Regards,
> Ilya Bakulin
> 
>