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sys/oneway-malloc: check calloc args

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This commit is contained in:
Kaspar Schleiser 2020-11-19 09:55:13 +01:00
parent 0695389dc2
commit e44fa2ba3e
1 changed files with 5 additions and 0 deletions
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5
sys/oneway-malloc/oneway-malloc.c
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@ -61,6 +61,11 @@ void __attribute__((weak)) *realloc(void *ptr, size_t size)
void __attribute__((weak)) *calloc(size_t size, size_t cnt)
{
/* ensure size * cnt doesn't overflow size_t */
if (cnt && size > (size_t)-1 / cnt) {
return NULL;
}
void *mem = malloc(size * cnt);
if (mem) {
memset(mem, 0, size * cnt);