unionfs_do_readpage forgot to clear the rest of the page when vfs_read
does not fill the page: fix that.
Signed-off-by: Hugh Dickins <[email protected]>
---
fs/unionfs/mmap.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- 2.6.24-rc1-mm1/fs/unionfs/mmap.c 2007-11-04 13:48:02.000000000 +0000
+++ linux/fs/unionfs/mmap.c 2007-11-06 13:51:02.000000000 +0000
@@ -176,7 +176,8 @@ static int unionfs_do_readpage(struct fi
err = vfs_read(lower_file, page_data, PAGE_CACHE_SIZE,
&lower_file->f_pos);
set_fs(old_fs);
-
+ if (err >= 0 && err < PAGE_CACHE_SIZE)
+ memset(page_data + err, 0, PAGE_CACHE_SIZE - err);
kunmap(page);
if (err < 0)
-
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