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fixed buffer overflow in weird jumptables

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Sean 2024-08-17 18:48:20 -07:00
parent 4223d9f413
commit da7a71c3bc
2 changed files with 2 additions and 2 deletions
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2
src/map.h
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@ -40,7 +40,7 @@ class Map {
void addEntry(uint32_t entry, uint32_t flags); void addEntry(uint32_t entry, uint32_t flags);
void addSymbol(uint32_t org, std::string name); void addSymbol(uint32_t org, std::string name);
uint32_t org; uint32_t org;
uint8_t b; uint8_t b = 0;
private: private:
std::string mapname; std::string mapname;

2
src/omf.cc
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@ -386,7 +386,7 @@ bool OMF::relocSegments() {
} }
} }
if (seg.isJump()) { // patch jumptable if (seg.isJump()) { // patch jumptable
for (int i = 8; i < seg.length; i += 14) { for (int i = 8; i < seg.length - 14; i += 14) {
uint16_t segnum = data[i + 4] | (data[i + 5] << 8); uint16_t segnum = data[i + 4] | (data[i + 5] << 8);
int32_t subOffset = data[i + 6] | (data[i + 7] << 8) | int32_t subOffset = data[i + 6] | (data[i + 7] << 8) |
(data[i + 8] << 16) | (data[i + 9] << 24); (data[i + 8] << 16) | (data[i + 9] << 24);