ext4: fix mballoc breakage with 64k block size

commit 69e43e8cc971a79dd1ee5d4343d8e63f82725123 upstream.

'border' variable is set to a value of 2 times the block size of the
underlying filesystem. With 64k block size, the resulting value won't
fit into a 16-bit variable. Hence this commit changes the data type of
'border' to 'unsigned int'.

Fixes: c9de560ded61f
Signed-off-by: Chandan Rajendra <chandan@linux.vnet.ibm.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 242fe11..3338f35 100644 (file)
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -652,7 +652,7 @@ static void ext4_mb_mark_free_simple(struct super_block *sb,
        ext4_grpblk_t min;
        ext4_grpblk_t max;
        ext4_grpblk_t chunk;
-       unsigned short border;
+       unsigned int border;
 
        BUG_ON(len > EXT4_CLUSTERS_PER_GROUP(sb));