ext4: fix setup_new_group_blocks locking
setup_new_group_blocks() manipulates the group descriptor block bh
under the block_bitmap bh's lock. It shouldn't matter since nobody
but resize should be touching these blocks, but it's worth fixing up.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index 0a7e914..484e569 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -199,10 +199,10 @@
brelse(gdb);
goto exit_bh;
}
- lock_buffer(bh);
- memcpy(gdb->b_data, sbi->s_group_desc[i]->b_data, bh->b_size);
+ lock_buffer(gdb);
+ memcpy(gdb->b_data, sbi->s_group_desc[i]->b_data, gdb->b_size);
set_buffer_uptodate(gdb);
- unlock_buffer(bh);
+ unlock_buffer(gdb);
ext4_journal_dirty_metadata(handle, gdb);
ext4_set_bit(bit, bh->b_data);
brelse(gdb);