From: Manish Katiyar <mkatiyar@gmail.com>
Date: Thu, 12 Feb 2009 20:57:04 +0000 (+0100)
Subject: ext2: Zero our b_size in ext2_quota_read()
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=c16831b4cc9b0805adf8ca3001752a7ec10a17bf;p=mv-sheeva.git

ext2: Zero our b_size in ext2_quota_read()

ext2_quota_read() doesn't initialize tmp_bh.b_size before calling
ext2_get_block() where we access it. Since it is a local variable it
might contain some garbage. Make sure it is filled with reasonable
value before passing.

Signed-off-by: Manish Katiyar <mkatiyar@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
---

diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 7c6e3606f0e..f983225266d 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -1331,6 +1331,7 @@ static ssize_t ext2_quota_read(struct super_block *sb, int type, char *data,
 				sb->s_blocksize - offset : toread;
 
 		tmp_bh.b_state = 0;
+		tmp_bh.b_size = sb->s_blocksize;
 		err = ext2_get_block(inode, blk, &tmp_bh, 0);
 		if (err < 0)
 			return err;