From: Darrick J. Wong <darrick.wong@oracle.com>
Date: Tue, 22 Aug 2017 15:01:30 +0000 (-0500)
Subject: xfs_db: bit fuzzing should read the right bit when flipping
X-Git-Tag: v4.13.0-rc1~21
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=592c10154f9928d6f44c18311f7edb4f4d7ff6de;p=thirdparty%2Fxfsprogs-dev.git

xfs_db: bit fuzzing should read the right bit when flipping

The middle and last bit flip fuzz verbs need to read the same bit that
they're trying to set.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
---

diff --git a/db/fuzz.c b/db/fuzz.c
index 53cedbc69..d0d78a943 100644
--- a/db/fuzz.c
+++ b/db/fuzz.c
@@ -226,7 +226,7 @@ fuzz_lastbit(
 	int		nbits)
 {
 	setbit_l((char *)buf, bitoff + nbits - 1,
-			!getbit_l((char *)buf, bitoff));
+			!getbit_l((char *)buf, bitoff + nbits - 1));
 	return true;
 }
 
@@ -238,7 +238,7 @@ fuzz_middlebit(
 	int		nbits)
 {
 	setbit_l((char *)buf, bitoff + nbits / 2,
-			!getbit_l((char *)buf, bitoff));
+			!getbit_l((char *)buf, bitoff + nbits / 2));
 	return true;
 }