fix(crypto): Fix undefined behavior in xmr_read_varint().

3 years ago · c5f26beeea
parent dab353f888
commit c5f26beeea
1 changed files with 1 additions and 1 deletions
--- a/crypto/monero/serialize.c
+++ b/crypto/monero/serialize.c
@ -37,7 +37,7 @@ int xmr_read_varint(uint8_t *buff, size_t buff_size, uint64_t *val) {

  for (int shift = 0; read < buff_size; shift += 7, ++read) {
    uint8_t byte = buff[read];
-    if (byte == 0 && shift != 0) {
+    if ((byte == 0 && shift != 0) || (shift >= 63 && byte > 1)) {
      return -1;
    }