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-rw-r--r--fs/xfs/xfs_dir2_leaf.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/xfs/xfs_dir2_leaf.c b/fs/xfs/xfs_dir2_leaf.c
index fa913e459442..41ad537c49e9 100644
--- a/fs/xfs/xfs_dir2_leaf.c
+++ b/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;
}
/*