4.17-stable review patch. If anyone has any objections, please let me know.
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From: Daniel Borkmann daniel@iogearbox.net
commit 18d405af30bf6506bf2fc49056de7691c949812e upstream.
Any eBPF JIT that where its underlying arch supports ARCH_HAS_SET_MEMORY would need to use bpf_jit_binary_{un,}lock_ro() pair instead of the set_memory_{ro,rw}() pair directly as otherwise changes to the former might break. arm32's eBPF conversion missed to change it, so fix this up here.
Fixes: 39c13c204bb1 ("arm: eBPF JIT compiler") Signed-off-by: Daniel Borkmann daniel@iogearbox.net Acked-by: Alexei Starovoitov ast@kernel.org Signed-off-by: Alexei Starovoitov ast@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- arch/arm/net/bpf_jit_32.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/arm/net/bpf_jit_32.c +++ b/arch/arm/net/bpf_jit_32.c @@ -1928,7 +1928,7 @@ struct bpf_prog *bpf_int_jit_compile(str /* there are 2 passes here */ bpf_jit_dump(prog->len, image_size, 2, ctx.target);
- set_memory_ro((unsigned long)header, header->pages); + bpf_jit_binary_lock_ro(header); prog->bpf_func = (void *)ctx.target; prog->jited = 1; prog->jited_len = image_size;