diff options
| author | Alexei Starovoitov <ast@fb.com> | 2017-12-15 04:55:14 +0300 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2017-12-17 22:34:36 +0300 |
| commit | 60b58afc96c9df71871df2dbad42037757ceef26 (patch) | |
| tree | 5651c4845120fc28c9712f53f31962adfd4abe73 /arch/powerpc/net | |
| parent | 1ea47e01ad6ea0fe99697c54c2413d81dd21fe32 (diff) | |
| download | linux-60b58afc96c9df71871df2dbad42037757ceef26.tar.xz | |
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/powerpc/net')
| -rw-r--r-- | arch/powerpc/net/bpf_jit_comp64.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/net/bpf_jit_comp64.c b/arch/powerpc/net/bpf_jit_comp64.c index 46d74e81aff1..d5a5bc43cf8f 100644 --- a/arch/powerpc/net/bpf_jit_comp64.c +++ b/arch/powerpc/net/bpf_jit_comp64.c @@ -993,7 +993,7 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *fp) struct bpf_prog *tmp_fp; bool bpf_blinded = false; - if (!bpf_jit_enable) + if (!fp->jit_requested) return org_fp; tmp_fp = bpf_jit_blind_constants(org_fp); |