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add check for overflowing size allocation

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This commit is contained in:
daan 2019-06-27 13:33:28 -07:00
parent 12d756e7b2
commit 1e636c45da
1 changed files with 6 additions and 1 deletions
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7
src/page.c
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@ -694,7 +694,12 @@ void* _mi_malloc_generic(mi_heap_t* heap, size_t size) mi_attr_noexcept
// huge allocation? // huge allocation?
mi_page_t* page; mi_page_t* page;
if (mi_unlikely(size > MI_LARGE_SIZE_MAX)) { if (mi_unlikely(size > MI_LARGE_SIZE_MAX)) {
page = mi_huge_page_alloc(heap,size); if (mi_unlikely(size >= (SIZE_MAX - MI_MAX_ALIGN_SIZE))) {
page = NULL;
}
else {
page = mi_huge_page_alloc(heap,size);
}
} }
else { else {
// otherwise find a page with free blocks in our size segregated queues // otherwise find a page with free blocks in our size segregated queues