diff options
| -rw-r--r-- | libkmod/libkmod-signature.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/libkmod/libkmod-signature.c b/libkmod/libkmod-signature.c index 2260cc6..5577305 100644 --- a/libkmod/libkmod-signature.c +++ b/libkmod/libkmod-signature.c @@ -124,7 +124,8 @@ bool kmod_module_signature_info(const struct kmod_file *file, struct kmod_signat modsig->id_type >= PKEY_ID_TYPE__LAST) return false; sig_len = be32toh(get_unaligned(&modsig->sig_len)); - if (size < (int64_t)(modsig->signer_len + modsig->key_id_len + sig_len)) + if (sig_len == 0 || + size < (int64_t)(modsig->signer_len + modsig->key_id_len + sig_len)) return false; size -= modsig->key_id_len + sig_len; |