[Devel] [RH7 PATCH 1/3] ext4: fix wrong assert in ext4_mb_normalize_request()

[Dmitry Monakhov]

Original commit 5b60778558

The variable "size" is expressed as number of blocks and not as
number of clusters, this could trigger a kernel panic when using
ext4 with the size of a cluster different from the size of a block.

Cc: stable at vger.kernel.org
Signed-off-by: Maurizio Lombardi <mlombard at redhat.com>
Signed-off-by: Theodore Ts'o <tytso at mit.edu>
Signed-off-by: Dmitry Monakhov <dmonakhov at openvz.org>
---
 fs/ext4/mballoc.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index dca78da..ebc7255 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -3117,7 +3117,7 @@ ext4_mb_normalize_request(struct ext4_allocation_context *ac,
 	}
 	BUG_ON(start + size <= ac->ac_o_ex.fe_logical &&
 			start > ac->ac_o_ex.fe_logical);
-	BUG_ON(size <= 0 || size > EXT4_CLUSTERS_PER_GROUP(ac->ac_sb));
+	BUG_ON(size <= 0 || size > EXT4_BLOCKS_PER_GROUP(ac->ac_sb));
 
 	/* now prepare goal request */
 
-- 
1.7.1