From: Tomohiro Kusumi <tkusumi@xxxxxxxxxx>
The footer offset (diff between malloc'd address and aligned address)
is (alignment-1) at most, and footer appears `size' bytes after the
aligned address, thus required size is (alignment-1 + size + sizeof(*f)).
The existing code seems to allocate extra unused `size' bytes.
Signed-off-by: Tomohiro Kusumi <tkusumi@xxxxxxxxxx>
---
lib/memalign.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lib/memalign.c b/lib/memalign.c
index 137cc8e..bfbd1e8 100644
--- a/lib/memalign.c
+++ b/lib/memalign.c
@@ -18,7 +18,7 @@ void *fio_memalign(size_t alignment, size_t size)
assert(!(alignment & (alignment - 1)));
- ptr = malloc(size + alignment + size + sizeof(*f) - 1);
+ ptr = malloc(size + alignment + sizeof(*f) - 1);
if (ptr) {
ret = PTR_ALIGN(ptr, alignment - 1);
f = ret + size;
--
2.9.5
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