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27 March 2024, 02:37:15 UTC
Revision 5c9ee4cbf2a945271f25b89b137f2c03bbc3be33 authored by Joseph Qi on 29 December 2015, 22:54:06 UTC, committed by Linus Torvalds on 30 December 2015, 01:45:49 UTC 
ocfs2: fix BUG when calculate new backup super
 
When resizing, it firstly extends the last gd.  Once it should backup
super in the gd, it calculates new backup super and update the
corresponding value.

But it currently doesn't consider the situation that the backup super is
already done.  And in this case, it still sets the bit in gd bitmap and
then decrease from bg_free_bits_count, which leads to a corrupted gd and
trigger the BUG in ocfs2_block_group_set_bits:

    BUG_ON(le16_to_cpu(bg->bg_free_bits_count) < num_bits);

So check whether the backup super is done and then do the updates.

Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Reviewed-by: Jiufei Xue <xuejiufei@huawei.com>
Reviewed-by: Yiwen Jiang <jiangyiwen@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent 8513342
History
Tip revision: 5c9ee4cbf2a945271f25b89b137f2c03bbc3be33 authored by Joseph Qi on 29 December 2015, 22:54:06 UTC
ocfs2: fix BUG when calculate new backup super
Tip revision: 5c9ee4c
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