diff options
| author | Daniel Borkmann <daniel@iogearbox.net> | 2015-11-14 03:26:53 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-11-16 22:40:49 +0300 |
| commit | ebaef649c26b44ff28114b452fd067a270ca7f02 (patch) | |
| tree | c709914711a5168ae566eded4ca7faba0ac68210 | |
| parent | 30b50aa612018bd92f5a85534cc2668423e8c7e8 (diff) | |
| download | linux-ebaef649c26b44ff28114b452fd067a270ca7f02.tar.xz | |
bpf, arm: start flushing icache range from header
During review I noticed that the icache range we're flushing should
start at header already and not at ctx.image.
Reason is that after 55309dd3d4cd ("net: bpf: arm: 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 <daniel@iogearbox.net>
Tested-by: Nicolas Schichan <nschichan@freebox.fr>
Cc: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | arch/arm/net/bpf_jit_32.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/net/bpf_jit_32.c b/arch/arm/net/bpf_jit_32.c index 2f4b14cfddb4..591f9db3bf40 100644 --- a/arch/arm/net/bpf_jit_32.c +++ b/arch/arm/net/bpf_jit_32.c @@ -1061,7 +1061,7 @@ void bpf_jit_compile(struct bpf_prog *fp) } build_epilogue(&ctx); - flush_icache_range((u32)ctx.target, (u32)(ctx.target + ctx.idx)); + flush_icache_range((u32)header, (u32)(ctx.target + ctx.idx)); #if __LINUX_ARM_ARCH__ < 7 if (ctx.imm_count) |