path: root/arch
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authorDaniel Borkmann <>2015-11-14 01:16:18 +0100
committerDavid S. Miller <>2015-11-16 14:41:30 -0500
commitc3d4c682c240595c3637c552dc1afa985bc6d382 (patch)
treece5cba420f360ac90831883ff7deba5b0093bfe8 /arch
parentebaef649c26b44ff28114b452fd067a270ca7f02 (diff)
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 <>
Diffstat (limited to 'arch')
1 files changed, 1 insertions, 1 deletions
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;