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authorAlexei Starovoitov <ast@fb.com>2017-12-14 17:55:14 -0800
committerDaniel Borkmann <daniel@iogearbox.net>2017-12-17 20:34:36 +0100
commit60b58afc96c9df71871df2dbad42037757ceef26 (patch)
tree5651c4845120fc28c9712f53f31962adfd4abe73 /arch/sparc
parent1ea47e01ad6ea0fe99697c54c2413d81dd21fe32 (diff)
bpf: fix net.core.bpf_jit_enable race
global bpf_jit_enable variable is tested multiple times in JITs, blinding and verifier core. The malicious root can try to toggle it while loading the programs. This race condition was accounted for and there should be no issues, but it's safer to avoid this race condition. Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'arch/sparc')
-rw-r--r--arch/sparc/net/bpf_jit_comp_64.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/sparc/net/bpf_jit_comp_64.c b/arch/sparc/net/bpf_jit_comp_64.c
index 5765e7e711f7..a2f1b5e774a7 100644
--- a/arch/sparc/net/bpf_jit_comp_64.c
+++ b/arch/sparc/net/bpf_jit_comp_64.c
@@ -1517,7 +1517,7 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *prog)
u8 *image_ptr;
int pass;
- if (!bpf_jit_enable)
+ if (!prog->jit_requested)
return orig_prog;
tmp = bpf_jit_blind_constants(prog);

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