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Fixed off-by-one buffer overrun in map_allow_copy() function which would lead to malformed initialization network packets. Added address sanitizer in db CMake.

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This commit is contained in:
Exynox 2022-11-27 01:10:23 +02:00
parent c8abacafaf
commit b5ea548038
3 changed files with 9 additions and 8 deletions
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3
db/CMakeLists.txt
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@ -26,3 +26,6 @@ find_package(Libevent CONFIG REQUIRED)
target_link_libraries(${PROJECT_NAME} PRIVATE libevent::core libevent::extra libevent::pthreads) target_link_libraries(${PROJECT_NAME} PRIVATE libevent::core libevent::extra libevent::pthreads)
target_link_libraries(${PROJECT_NAME} PRIVATE libpoly libsql libthecore) target_link_libraries(${PROJECT_NAME} PRIVATE libpoly libsql libthecore)
# Memory debugging
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=address -g")

12
game/src/config.cpp
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@ -169,18 +169,16 @@ void map_allow_add(int index)
s_set_map_allows.insert(index); s_set_map_allows.insert(index);
} }
void map_allow_copy(LONG * pl, int size) void map_allow_copy(int * pl, int size)
{ {
int iCount = 0; int iCount = 0;
std::set<int>::iterator it = s_set_map_allows.begin();
while (it != s_set_map_allows.end()) for (auto mapId: s_set_map_allows)
{ {
int i = *(it++); if (iCount >= size)
*(pl++) = i; break;
if (++iCount > size) pl[iCount++] = mapId;
break;
} }
} }

2
game/src/config.h
View File

@ -37,7 +37,7 @@ extern bool g_bTrafficProfileOn; ///< true
extern BYTE g_bChannel; extern BYTE g_bChannel;
extern bool map_allow_find(int index); extern bool map_allow_find(int index);
extern void map_allow_copy(LONG * pl, int size); extern void map_allow_copy(int * pl, int size);
extern bool no_wander; extern bool no_wander;
extern int g_iUserLimit; extern int g_iUserLimit;