Subject: Re: [PATCH 2/8] bitmap: Introduce bitmap_set, bitmap_clear, bitmap_find_next_zero_area

From: Akinobu Mita <[email-masked]>
Date: Tue, 13 Oct 2009 18:10:17 +0900

My user space testing exposed off-by-one error find_next_zero_area
in iommu-helper. Some zero area cannot be found by this bug.

Subject: [PATCH] Fix off-by-one error in find_next_zero_area

Signed-off-by: Akinobu Mita <[email-masked]>
---
 lib/iommu-helper.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/lib/iommu-helper.c b/lib/iommu-helper.c
index 75dbda0..afc58bc 100644
--- a/lib/iommu-helper.c
+++ b/lib/iommu-helper.c
@@ -19,7 +19,7 @@ again:
 	index = (index + align_mask) & ~align_mask;
 
 	end = index + nr;
-	if (end >= size)
+	if (end > size)
 		return -1;
 	for (i = index; i < end; i++) {
 		if (test_bit(i, map)) {
-- 
1.5.4.3