bpf/btf: Fix BTF verification of enum members in struct/union
commitda6c7faeb1
upstream. btf_enum_check_member() was currently sure to recognize the size of "enum" type members in struct/union as the size of "int" even if its size was packed. This patch fixes BTF enum verification to use the correct size of member in BPF programs. Fixes:179cde8cef
("bpf: btf: Check members of struct/union") Signed-off-by: Yoshiki Komachi <komachi.yoshiki@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/1583825550-18606-2-git-send-email-komachi.yoshiki@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -2309,7 +2309,7 @@ static int btf_enum_check_member(struct btf_verifier_env *env,
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struct_size = struct_type->size;
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bytes_offset = BITS_ROUNDDOWN_BYTES(struct_bits_off);
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if (struct_size - bytes_offset < sizeof(int)) {
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if (struct_size - bytes_offset < member_type->size) {
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btf_verifier_log_member(env, struct_type, member,
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"Member exceeds struct_size");
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return -EINVAL;
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