linux-ext4 - [PATCH 1/2] - ext3: fix setup_new_group

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Date:	Mon, 01 Oct 2007 14:24:16 -0500
From:	Eric Sandeen <sandeen@...hat.com>
To:	ext4 development <linux-ext4@...r.kernel.org>
Subject: [PATCH 1/2] - ext3: 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@...hat.com>

Index: linux-2.6.23-rc7/fs/ext3/resize.c
===================================================================
--- linux-2.6.23-rc7.orig/fs/ext3/resize.c
+++ linux-2.6.23-rc7/fs/ext3/resize.c
@@ -212,10 +212,10 @@ static int setup_new_group_blocks(struct
 			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);
 		ext3_journal_dirty_metadata(handle, gdb);
 		ext3_set_bit(bit, bh->b_data);
 		brelse(gdb);

-
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