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47 lines
1.3 KiB
47 lines
1.3 KiB
7 years ago
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diff --git glibc-2.17-c758a686/malloc/malloc.c glibc-2.17-c758a686/malloc/malloc.c
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index 3148c5f..f7718a9 100644
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--- glibc-2.17-c758a686/malloc/malloc.c
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+++ glibc-2.17-c758a686/malloc/malloc.c
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@@ -3015,6 +3015,13 @@ __libc_memalign(size_t alignment, size_t bytes)
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/* Otherwise, ensure that it is at least a minimum chunk size */
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if (alignment < MINSIZE) alignment = MINSIZE;
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+ /* Check for overflow. */
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+ if (bytes > SIZE_MAX - alignment - MINSIZE)
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+ {
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+ __set_errno (ENOMEM);
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+ return 0;
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+ }
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+
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arena_get(ar_ptr, bytes + alignment + MINSIZE);
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if(!ar_ptr)
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return 0;
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@@ -3046,6 +3046,13 @@ __libc_valloc(size_t bytes)
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size_t pagesz = GLRO(dl_pagesize);
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+ /* Check for overflow. */
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+ if (bytes > SIZE_MAX - pagesz - MINSIZE)
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+ {
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+ __set_errno (ENOMEM);
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+ return 0;
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+ }
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+
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__malloc_ptr_t (*hook) __MALLOC_PMT ((size_t, size_t,
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const __malloc_ptr_t)) =
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force_reg (__memalign_hook);
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@@ -3082,6 +3082,13 @@ __libc_pvalloc(size_t bytes)
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size_t page_mask = GLRO(dl_pagesize) - 1;
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size_t rounded_bytes = (bytes + page_mask) & ~(page_mask);
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+ /* Check for overflow. */
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+ if (bytes > SIZE_MAX - 2*pagesz - MINSIZE)
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+ {
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+ __set_errno (ENOMEM);
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+ return 0;
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+ }
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+
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__malloc_ptr_t (*hook) __MALLOC_PMT ((size_t, size_t,
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const __malloc_ptr_t)) =
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force_reg (__memalign_hook);
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