packet: reset network header if packet shorter than ll reserved space

[Nicolas Dichtel]

Hi Ubuntu kernel team,

please, can you consider to cherry-pick the following linux upstream fix:
993675a3100b ("packet: reset network header if packet shorter than ll reserved
space")

It has been included in v4.18 and the patch that introduces the bug has been
included in v4.17, but the initial patch has been backported in the ubuntu
kernel (bionic).

Here is the launchpad entry:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1823725


Thank you,
Nicolas