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don't allow allocations larger than PTRDIFF_MAX, issue #121

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daan 2019-08-19 19:29:27 -07:00
parent 74299646bb
commit 2066e2797d
1 changed files with 1 additions and 1 deletions
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2
src/page.c
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@ -741,7 +741,7 @@ 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_OBJ_SIZE_MAX)) { if (mi_unlikely(size > MI_LARGE_OBJ_SIZE_MAX)) {
if (mi_unlikely(size >= (SIZE_MAX - MI_MAX_ALIGN_SIZE))) { if (mi_unlikely(size > PTRDIFF_MAX)) { // we don't allocate more than PTRDIFF_MAX (see <https://sourceware.org/ml/libc-announce/2019/msg00001.html>)
page = NULL; page = NULL;
} }
else { else {