bpf: introduce bpf_skb_vlan_push/pop() helpers

[deliverable/linux.git] / arch / s390 / net / bpf_jit_comp.c

diff --git a/arch/s390/net/bpf_jit_comp.c b/arch/s390/net/bpf_jit_comp.c
index fee782acc2ee51f6a3aae4b28152ec76981c8350..79c731e8d17805618e7cf8140ec49f2ccad8a55e 100644 (file)
--- a/arch/s390/net/bpf_jit_comp.c
+++ b/arch/s390/net/bpf_jit_comp.c
@@ -973,6 +973,10 @@ static noinline int bpf_jit_insn(struct bpf_jit *jit, struct bpf_prog *fp, int i
                 */
                const u64 func = (u64)__bpf_call_base + imm;
 
+               if (bpf_helper_changes_skb_data((void *)func))
+                       /* TODO reload skb->data, hlen */
+                       return -1;
+
                REG_SET_SEEN(BPF_REG_5);
                jit->seen |= SEEN_FUNC;
                /* lg %w1,<d(imm)>(%l) */