posix_memalign should fail if size is not a multiple of sizeof(void *)

diff --git a/src/malloc/posix_memalign.c b/src/malloc/posix_memalign.c
index ef86260..2ae928c 100644 (file)
--- a/src/malloc/posix_memalign.c
+++ b/src/malloc/posix_memalign.c
@@ -11,7 +11,7 @@ int posix_memalign(void **res, size_t align, size_t len)
        unsigned char *mem, *new, *end;
        size_t header, footer;
 
-       if ((align & -align) != align) return EINVAL;
+       if ((align & -align & -sizeof(void *)) != align) return EINVAL;
        if (len > SIZE_MAX - align) return ENOMEM;
 
        if (align <= 4*sizeof(size_t)) {