From: Erez Zadok <ezk@cs.sunysb.edu>
Date: Fri, 9 Nov 2007 15:27:32 +0000 (-0500)
Subject: Unionfs: clear partial read in readpage
X-Git-Url: https://git.fsl.cs.sunysb.edu/?a=commitdiff_plain;h=fe30243105c8990285a649bdb881da83be75e091;p=unionfs-3.11.y.git

Unionfs: clear partial read in readpage

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
---

diff --git a/fs/unionfs/mmap.c b/fs/unionfs/mmap.c
index 468dc61b9cb..bb00fd50197 100644
--- a/fs/unionfs/mmap.c
+++ b/fs/unionfs/mmap.c
@@ -178,7 +178,8 @@ static int unionfs_do_readpage(struct file *file, struct page *page)
 	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)