On Mon, Jan 04, 2016 at 11:26:37AM -0500, Craig Gallek wrote:

From: Craig Gallek <redacted>

Expose socket options for setting a classic or extended BPF program
for use when selecting sockets in an SO_REUSEPORT group.  These options
can be used on the first socket to belong to a group before bind or
on any socket in the group after bind.

This change includes refactoring of the existing sk_filter code to
allow reuse of the existing BPF filter validation checks.

Signed-off-by: Craig Gallek <redacted>

...

+	/* temporarily advance data past protocol header */
+	if (!pskb_may_pull(skb, hdr_len) || !pskb_pull(skb, hdr_len)) {
+		consume_skb(nskb);
+		return NULL;
+	}

pskb_pull() includes pskb_may_pull().