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asctime_r: add param check to asctime_r() #8292

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merged 1 commit into from Jan 28, 2023
Merged

asctime_r: add param check to asctime_r() #8292

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15 changes: 15 additions & 0 deletions libs/libc/time/lib_asctimer.c
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Expand Up @@ -28,6 +28,14 @@

#include <nuttx/time.h>

/****************************************************************************
* Pre-processor definitions
****************************************************************************/

#ifndef ARRAY_SIZE
# define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
#endif

/****************************************************************************
* Private Data
****************************************************************************/
Expand Down Expand Up @@ -73,6 +81,13 @@ FAR char *asctime_r(FAR const struct tm *tp, FAR char *buf)
{
char tmp[128];

if (tp == NULL ||
tp->tm_wday >= ARRAY_SIZE(g_wday_name) ||
tp->tm_mon >= ARRAY_SIZE(g_mon_name))
{
return NULL;
}

snprintf(tmp, sizeof(tmp), "%.3s %.3s%3d %.2d:%.2d:%.2d %d\n",
g_wday_name[tp->tm_wday], g_mon_name[tp->tm_mon],
tp->tm_mday, tp->tm_hour, tp->tm_min, tp->tm_sec,
Expand Down