CVE-2021-46954 net/sched: sch_frag: fix stack OOB read while fragmenting IPv4 packets

In the Linux kernel, the following vulnerability has been resolved: net/sched: schfrag: fix stack OOB read while fragmenting IPv4 packets when 'actmirred' tries to fragment IPv4 packets that had been previously re-assembled using 'actct', splats like the following can be observed on kernels built...