diff options
| -rw-r--r-- | src/util/asmap.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/util/asmap.cpp b/src/util/asmap.cpp index b4090482b9..bd77d74218 100644 --- a/src/util/asmap.cpp +++ b/src/util/asmap.cpp @@ -93,7 +93,8 @@ uint32_t Interpret(const std::vector<bool> &asmap, const std::vector<bool> &ip) jump = DecodeJump(pos, endpos); if (jump == INVALID) break; // Jump offset straddles EOF if (bits == 0) break; // No input bits left - if (jump >= endpos - pos) break; // Jumping past EOF + if (pos + jump < pos) break; // overflow + if (pos + jump >= endpos) break; // Jumping past EOF if (ip[ip.size() - bits]) { pos += jump; } @@ -155,7 +156,8 @@ bool SanityCheckASMap(const std::vector<bool>& asmap, int bits) } else if (opcode == Instruction::JUMP) { uint32_t jump = DecodeJump(pos, endpos); if (jump == INVALID) return false; // Jump offset straddles EOF - if (jump > endpos - pos) return false; // Jump out of range + if (pos + jump < pos) return false; // overflow + if (pos + jump > endpos) return false; // Jump out of range if (bits == 0) return false; // Consuming bits past the end of the input --bits; uint32_t jump_offset = pos - begin + jump; |