CVE-2024-47708

In the Linux kernel, the following vulnerability has been resolved:

netkit: Assign missing bpfnetcontext

During the introduction of struct bpfnetcontext handling for XDP-redirect, the netkit driver has been missed, which also requires it because NETKITREDIRECT invokes skbdo_redirect() which is accessing the per-CPU variables. Otherwise we see the following crash:

BUG: kernel NULL pointer dereference, address: 0000000000000038
bpf_redirect()
netkit_xmit()
dev_hard_start_xmit()

Set the bpfnetcontext before invoking netkit_xmit() program within the netkit driver.