From: Jan Kara <jack@suse.cz>
Date: Mon, 7 Apr 2008 21:16:38 +0000 (+0200)
Subject: udf: Silence warning about accesses beyond end of device
X-Git-Tag: v2.6.26-rc1~1108^2~9
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=4f7874c868eaedd0e64b2f6c800bc852bdc7f38b;p=linux-2.6-omap-h63xx.git

udf: Silence warning about accesses beyond end of device

Some of the computed positions of anchor block could be beyond the end of
device. Skip reading such blocks.

Signed-off-by: Jan Kara <jack@suse.cz>
---

diff --git a/fs/udf/super.c b/fs/udf/super.c
index b9e719de070..28ed3f5ebd7 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -688,8 +688,12 @@ static int udf_check_anchor_block(struct super_block *sb, sector_t block,
 	uint16_t ident;
 	uint32_t location;
 
-	if (varconv)
+	if (varconv) {
+		if (udf_fixed_to_variable(block) >=
+		    sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
+			return 0;
 		bh = sb_bread(sb, udf_fixed_to_variable(block));
+	}
 	else
 		bh = sb_bread(sb, block);