On Fri, Aug 31, 2018 at 08:38:49AM -0300, Thadeu Lima de Souza Cascardo wrote:
> After commit d6990976af7c5d8f55903bfb4289b6fb030bf754 ("vti6: fix PMTU caching
> and reporting on xmit"), some too big skbs might be potentially passed down to
> __xfrm6_output, causing it to fail to transmit but not free the skb, causing a
> leak of skb, and consequentially a leak of dst references.
>
> After running pmtu.sh, that shows as failure to unregister devices in a
> namespace:
>
> [ 311.397671] unregister_netdevice: waiting for veth_b to become free. Usage
> count = 1
>
> The fix is to call kfree_skb in case of transmit failures.
>
> Signed-off-by: Thadeu Lima de Souza Cascardo <[email protected]>
> Reviewed-by: Sabrina Dubroca <[email protected]>
> Fixes: dd767856a36e ("xfrm6: Don't call icmpv6_send on local error")
Applied, thanks a lot!
