From: Jens Axboe <axboe@fb.com>
Date: Tue, 23 Sep 2014 16:59:50 +0000 (-0600)
Subject: memalign: fix off-by-one bug in alignment
X-Git-Tag: fio-2.1.13~54
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=5fb55c77dbd78c38d2beb728fb2723e04fec3cd2;p=fio.git

memalign: fix off-by-one bug in alignment

Signed-off-by: Jens Axboe <axboe@fb.com>
---

diff --git a/memalign.c b/memalign.c
index 7a04ffd8..cfd6e463 100644
--- a/memalign.c
+++ b/memalign.c
@@ -20,7 +20,7 @@ void *fio_memalign(size_t alignment, size_t size)
 
 	ptr = malloc(size + alignment + size + sizeof(*f) - 1);
 	if (ptr) {
-		ret = PTR_ALIGN(ptr, alignment);
+		ret = PTR_ALIGN(ptr, alignment - 1);
 		f = ret + size;
 		f->offset = (uintptr_t) ret - (uintptr_t) ptr;
 	}