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-rw-r--r--fs/ntfs3/file.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/ntfs3/file.c b/fs/ntfs3/file.c
index 2ecd0303f942..4aea45821611 100644
--- a/fs/ntfs3/file.c
+++ b/fs/ntfs3/file.c
@@ -335,6 +335,7 @@ static int ntfs_extend(struct inode *inode, loff_t pos, size_t count,
}
if (extend_init && !is_compressed(ni)) {
+ WARN_ON(ni->i_valid >= pos);
err = ntfs_extend_initialized_size(file, ni, ni->i_valid, pos);
if (err)
goto out;