Re: [RFC 1/2] virtio_console: Add support for DMA memory allocation

[Rusty Russell]

"Michael S. Tsirkin" <mst@xxxxxxxxxx> writes:
>> virtio: don't crash when device is buggy
>> 
>> Because of a sanity check in virtio_dev_remove, a buggy device can crash
>> kernel.  And in case of rproc it's userspace so it's not a good idea.
>> We are unloading a driver so how bad can it be?
>> Be less aggressive in handling this error: if it's a driver bug,
>> warning once should be enough.
>> 
>> Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
>
> Rusty?

Thanks, applied.

I really want to implement CONFIG_VIRTIO_DEVEL_DEBUG which would
incorporate the checks in virtio_ring.c as well as this.  Then I could
also reshuffle descriptors (eg. split them) to find buggy devices like
qemu which assume the first descriptor is the struct virtio_net_hdr...

Cheers,
Rusty,
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/