From 5cc91287634881eb199b38c778c62f50b285e696 Mon Sep 17 00:00:00 2001
From: Eric Sandeen <sandeen@sandeen.net>
Date: Fri, 25 Sep 2009 19:42:26 +0000
Subject: [PATCH] --- yaml --- r: 167175 b: refs/heads/master c:
 8e69ce147127a0235e8d1f2b75ea214be78c61b3 h: refs/heads/master i:   167173:
 67aabb2df5ed3d1129686f833400d090286a61e2   167171:
 5b47f5e495acbe9f61f7725a5365d8f93a2e5408   167167:
 f56ef75aea235340a1004f5f02d78a38a365e7f0 v: v3

---
 [refs]                       | 2 +-
 trunk/fs/xfs/xfs_dir2_leaf.c | 4 +++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/[refs] b/[refs]
index ab89cc75f367..5f906234406f 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: dce5065a57c158e0ca5db8e63c50118b2ecf4ac5
+refs/heads/master: 8e69ce147127a0235e8d1f2b75ea214be78c61b3
diff --git a/trunk/fs/xfs/xfs_dir2_leaf.c b/trunk/fs/xfs/xfs_dir2_leaf.c
index fa913e459442..41ad537c49e9 100644
--- a/trunk/fs/xfs/xfs_dir2_leaf.c
+++ b/trunk/fs/xfs/xfs_dir2_leaf.c
@@ -854,6 +854,7 @@ xfs_dir2_leaf_getdents(
 			 */
 			ra_want = howmany(bufsize + mp->m_dirblksize,
 					  mp->m_sb.sb_blocksize) - 1;
+			ASSERT(ra_want >= 0);
 
 			/*
 			 * If we don't have as many as we want, and we haven't
@@ -1088,7 +1089,8 @@ xfs_dir2_leaf_getdents(
 		 */
 		ptr += length;
 		curoff += length;
-		bufsize -= length;
+		/* bufsize may have just been a guess; don't go negative */
+		bufsize = bufsize > length ? bufsize - length : 0;
 	}
 
 	/*