Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  Ext4: Fix online resize block group descriptor corruption

diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index 9ecb92f..9ff7b1c 100644 (file)
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -855,7 +855,8 @@ int ext4_group_add(struct super_block *sb, struct ext4_new_group_data *input)
         */
 
        /* Update group descriptor block for new group */
-       gdp = (struct ext4_group_desc *)primary->b_data + gdb_off;
+       gdp = (struct ext4_group_desc *)((char *)primary->b_data +
+                                        gdb_off * EXT4_DESC_SIZE(sb));
 
        ext4_block_bitmap_set(sb, gdp, input->block_bitmap); /* LV FIXME */
        ext4_inode_bitmap_set(sb, gdp, input->inode_bitmap); /* LV FIXME */