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authorAlexei Starovoitov <ast@kernel.org>2019-09-17 10:45:37 -0700
committerDaniel Borkmann <daniel@iogearbox.net>2019-09-19 14:22:44 +0200
commit9eea984979513d6ee137e545e26c5877d46039dd (patch)
tree44705f0e9fad8a7b3206d3b582e06875ce86f565 /kernel
parente0973a421c6e9d268db2157bcb8756e7ab4b4313 (diff)
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bpf: fix BTF verification of enums
vmlinux BTF has enums that are 8 byte and 1 byte in size. 2 byte enum is a valid construct as well. Fix BTF enum verification to accept those sizes. Fixes: 69b693f0aefa ("bpf: btf: Introduce BPF Type Format (BTF)") Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/bpf/btf.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c
index adb3adcebe3c..722d38e543e9 100644
--- a/kernel/bpf/btf.c
+++ b/kernel/bpf/btf.c
@@ -2377,9 +2377,8 @@ static s32 btf_enum_check_meta(struct btf_verifier_env *env,
return -EINVAL;
}
- if (t->size != sizeof(int)) {
- btf_verifier_log_type(env, t, "Expected size:%zu",
- sizeof(int));
+ if (t->size > 8 || !is_power_of_2(t->size)) {
+ btf_verifier_log_type(env, t, "Unexpected size");
return -EINVAL;
}