mem: check if allocation size is too big
Mapping size is a 64-bit integer, but mmap() will accept size_t for size mappings. A user could request a mapping with an alignment, which would have overflown size_t, so check if (size + alignment) will overflow size_t. Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com> Acked-by: Bruce Richardson <bruce.richardson@intel.com>
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@ -75,8 +75,13 @@ eal_get_virtual_area(void *requested_addr, size_t *size,
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do {
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map_sz = no_align ? *size : *size + page_sz;
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if (map_sz > SIZE_MAX) {
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RTE_LOG(ERR, EAL, "Map size too big\n");
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rte_errno = E2BIG;
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return NULL;
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}
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mapped_addr = mmap(requested_addr, map_sz, PROT_READ,
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mapped_addr = mmap(requested_addr, (size_t)map_sz, PROT_READ,
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mmap_flags, -1, 0);
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if (mapped_addr == MAP_FAILED && allow_shrink)
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*size -= page_sz;
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