CVE-2024-26739

In the Linux kernel, the following vulnerability has been resolved:
net/sched: act_mirred: don’t override retval if we already lost the skb If
we’re redirecting the skb, and haven’t called tcf_mirred_forward(), yet, we
need to tell the core to drop the skb by setting the retcode to SHOT. If we
have called tcf_mirred_forward(), however, the skb is out of our hands and
returning SHOT will lead to UaF. Move the retval override to the error path
which actually need it.