bpf, ppc64: do not reload skb pointers in non-skb context

[sfrench/cifs-2.6.git] / arch / powerpc / net / bpf_jit_comp64.c

diff --git a/arch/powerpc/net/bpf_jit_comp64.c b/arch/powerpc/net/bpf_jit_comp64.c
index 46d74e81aff1b4caad4769e7686fa0a800695cd4..d183b4801bdbded832b90d2aa1a18e713f70695b 100644 (file)
--- a/arch/powerpc/net/bpf_jit_comp64.c
+++ b/arch/powerpc/net/bpf_jit_comp64.c
@@ -763,7 +763,8 @@ emit_clear:
                        func = (u8 *) __bpf_call_base + imm;
 
                        /* Save skb pointer if we need to re-cache skb data */
-                       if (bpf_helper_changes_pkt_data(func))
+                       if ((ctx->seen & SEEN_SKB) &&
+                           bpf_helper_changes_pkt_data(func))
                                PPC_BPF_STL(3, 1, bpf_jit_stack_local(ctx));
 
                        bpf_jit_emit_func_call(image, ctx, (u64)func);
@@ -772,7 +773,8 @@ emit_clear:
                        PPC_MR(b2p[BPF_REG_0], 3);
 
                        /* refresh skb cache */
-                       if (bpf_helper_changes_pkt_data(func)) {
+                       if ((ctx->seen & SEEN_SKB) &&
+                           bpf_helper_changes_pkt_data(func)) {
                                /* reload skb pointer to r3 */
                                PPC_BPF_LL(3, 1, bpf_jit_stack_local(ctx));
                                bpf_jit_emit_skb_loads(image, ctx);