From: Daniel Borkmann Date: Sat, 14 Nov 2015 00:16:18 +0000 (+0100) Subject: bpf, arm64: start flushing icache range from header X-Git-Tag: v4.4-rc2~28^2~36 X-Git-Url: http://git.cascardo.eti.br/?a=commitdiff_plain;h=c3d4c682c240595c3637c552dc1afa985bc6d382;p=cascardo%2Flinux.git bpf, arm64: start flushing icache range from header While recently going over ARM64's BPF code, I noticed that the icache range we're flushing should start at header already and not at ctx.image. Reason is that after b569c1c622c5 ("net: bpf: arm64: address randomize and write protect JIT code"), we also want to make sure to flush the random-sized trap in front of the start of the actual program (analogous to x86). No operational differences from user side. Signed-off-by: Daniel Borkmann Acked-by: Zi Shen Lim Cc: Alexei Starovoitov Signed-off-by: David S. Miller --- diff --git a/arch/arm64/net/bpf_jit_comp.c b/arch/arm64/net/bpf_jit_comp.c index ac8b548ce493..64a8bc12f4a2 100644 --- a/arch/arm64/net/bpf_jit_comp.c +++ b/arch/arm64/net/bpf_jit_comp.c @@ -740,7 +740,7 @@ void bpf_int_jit_compile(struct bpf_prog *prog) if (bpf_jit_enable > 1) bpf_jit_dump(prog->len, image_size, 2, ctx.image); - bpf_flush_icache(ctx.image, ctx.image + ctx.idx); + bpf_flush_icache(header, ctx.image + ctx.idx); set_memory_ro((unsigned long)header, header->pages); prog->bpf_func = (void *)ctx.image;