bpf, arm32: fix to use bpf_jit_binary_lock_ro api

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>

diff --git a/arch/arm/net/bpf_jit_32.c b/arch/arm/net/bpf_jit_32.c
index b5030e1a41d829fae51d93afdadd2597f99792db..5539fba892ceaba8865b756d16f556e2fcb7a937 100644 (file)
--- 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(struct bpf_prog *prog)
                /* 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;