From: Mohammed Gamal <mga...@redhat.com> Date: Tue, 13 Mar 2018 20:06:50 +0100
> Dring high network traffic changes to network interface parameters > such as number of channels or MTU can cause a kernel panic with a NULL > pointer dereference. This is due to netvsc_device_remove() being > called and deallocating the channel ring buffers, which can then be > accessed by netvsc_send_pkt() before they're allocated on calling > netvsc_device_add() > > The patch fixes this problem by checking the channel state and returning > ENODEV if not yet opened. We also move the call to hv_ringbuf_avail_percent() > which may access the uninitialized ring buffer. > > Signed-off-by: Mohammed Gamal <mga...@redhat.com> Based upon the discusion on this patch, it looks like this will be fixed in some other way.
