Description: xen/netback: Fix buffer overrun triggered by unusual packet
References:
 https://xenbits.xen.org/xsa/advisory-432.html
Notes:
 carnil> Fixed as well in 6.4.9 for 4.9.y.
Bugs:
upstream: released (6.5-rc6) [534fc31d09b706a16d83533e16b5dc855caf7576]
6.1-upstream-stable: released (6.1.44) [fa5b932b77c815d0e416612859d5899424bb4212]
5.10-upstream-stable: released (5.10.189) [f9167a2d6b943f30743de6ff8163d1981c34f9a9]
4.19-upstream-stable: released (4.19.290) [11e6919ae028b5de1fc48007354ea07069561b31]
sid: released (6.4.11-1)
6.1-bookworm-security: released (6.1.52-1)
5.10-bullseye-security: released (5.10.191-1)
4.19-buster-security: released (4.19.304-1)