[ovs-dev] Crash when using packet generator with GRE or VXLAN

[Jesse Gross]

On Wed, Nov 23, 2011 at 12:09 AM, Simon Horman <horms at verge.net.au> wrote:
> Hi,
>
> I have observed the following crash below using the in-kernel packet generator
> with skb_clone set to a non-zero value.

It's not safe to do this with many software devices including OVS that
write into the skb.  Linux 3.1 introduced a flag (IFF_TX_SKB_SHARING)
that allows devices to block it but either way you shouldn't do this.