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heap: Add integer overflow checks

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Angus Gratton
2018-06-18 16:24:49 +10:00
committed by bot
parent 7933b75416
commit fd88d6d89c
5 changed files with 49 additions and 12 deletions
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16
components/heap/heap_caps.c
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@@ -305,12 +305,18 @@ IRAM_ATTR void *heap_caps_realloc( void *ptr, size_t size, int caps)
IRAM_ATTR void *heap_caps_calloc( size_t n, size_t size, uint32_t caps)
{
void *r;
r = heap_caps_malloc(n*size, caps);
if (r != NULL) {
bzero(r, n*size);
void *result;
size_t size_bytes;
if (__builtin_mul_overflow(n, size, &size_bytes)) {
return NULL;
}
return r;
result = heap_caps_malloc(size_bytes, caps);
if (result != NULL) {
bzero(result, size_bytes);
}
return result;
}
size_t heap_caps_get_free_size( uint32_t caps )