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nanodbc: Fix use after free 

Cherry picked from upstream commit e24383436703c9151af1e22652e7d4dbbb52fc15

e243834367
This commit is contained in:
Roberto Fernandez Bautista 2024-03-19 18:50:04 +01:00
parent 3303c17c9b
commit 69107816f1
1 changed files with 24 additions and 8 deletions
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32
thirdparty/nanodbc/nanodbc/nanodbc.cpp vendored
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@ -3252,11 +3252,17 @@ inline void result::result_impl::get_ref_impl(short column, T& result) const
case SQL_C_DATE: case SQL_C_DATE:
{ {
const date d = *ensure_pdata<date>(column); const date d = *ensure_pdata<date>(column);
std::tm st = {0}; std::tm st{};
st.tm_year = d.year - 1900; st.tm_year = d.year - 1900;
st.tm_mon = d.month - 1; st.tm_mon = d.month - 1;
st.tm_mday = d.day; st.tm_mday = d.day;
char* old_lc_time = std::setlocale(LC_TIME, nullptr); std::string old_lc_time_container;
const char* old_lc_time = nullptr;
if (char* olc_lc_time_ptr = std::setlocale(LC_TIME, nullptr))
{
old_lc_time_container = olc_lc_time_ptr;
old_lc_time = old_lc_time_container.c_str();
}
std::setlocale(LC_TIME, ""); std::setlocale(LC_TIME, "");
char date_str[512]; char date_str[512];
std::strftime(date_str, sizeof(date_str), "%Y-%m-%d", &st); std::strftime(date_str, sizeof(date_str), "%Y-%m-%d", &st);
@ -3264,15 +3270,20 @@ inline void result::result_impl::get_ref_impl(short column, T& result) const
convert(date_str, result); convert(date_str, result);
return; return;
} }
case SQL_C_TIME: case SQL_C_TIME:
{ {
const time t = *ensure_pdata<time>(column); const time t = *ensure_pdata<time>(column);
std::tm st = {0}; std::tm st{};
st.tm_hour = t.hour; st.tm_hour = t.hour;
st.tm_min = t.min; st.tm_min = t.min;
st.tm_sec = t.sec; st.tm_sec = t.sec;
char* old_lc_time = std::setlocale(LC_TIME, nullptr); std::string old_lc_time_container;
const char* old_lc_time = nullptr;
if (char* olc_lc_time_ptr = std::setlocale(LC_TIME, nullptr))
{
old_lc_time_container = olc_lc_time_ptr;
old_lc_time = old_lc_time_container.c_str();
}
std::setlocale(LC_TIME, ""); std::setlocale(LC_TIME, "");
char date_str[512]; char date_str[512];
std::strftime(date_str, sizeof(date_str), "%H:%M:%S", &st); std::strftime(date_str, sizeof(date_str), "%H:%M:%S", &st);
@ -3280,18 +3291,23 @@ inline void result::result_impl::get_ref_impl(short column, T& result) const
convert(date_str, result); convert(date_str, result);
return; return;
} }
case SQL_C_TIMESTAMP: case SQL_C_TIMESTAMP:
{ {
const timestamp stamp = *ensure_pdata<timestamp>(column); const timestamp stamp = *ensure_pdata<timestamp>(column);
std::tm st = {0}; std::tm st{};
st.tm_year = stamp.year - 1900; st.tm_year = stamp.year - 1900;
st.tm_mon = stamp.month - 1; st.tm_mon = stamp.month - 1;
st.tm_mday = stamp.day; st.tm_mday = stamp.day;
st.tm_hour = stamp.hour; st.tm_hour = stamp.hour;
st.tm_min = stamp.min; st.tm_min = stamp.min;
st.tm_sec = stamp.sec; st.tm_sec = stamp.sec;
char* old_lc_time = std::setlocale(LC_TIME, nullptr); std::string old_lc_time_container;
const char* old_lc_time = nullptr;
if (char* olc_lc_time_ptr = std::setlocale(LC_TIME, nullptr))
{
old_lc_time_container = olc_lc_time_ptr;
old_lc_time = old_lc_time_container.c_str();
}
std::setlocale(LC_TIME, ""); std::setlocale(LC_TIME, "");
char date_str[512]; char date_str[512];
std::strftime(date_str, sizeof(date_str), "%Y-%m-%d %H:%M:%S %z", &st); std::strftime(date_str, sizeof(date_str), "%Y-%m-%d %H:%M:%S %z", &st);