At 06/01/2016 12:50 AM, David Sterba wrote:
On Tue, May 31, 2016 at 03:51:13PM +0800, Qu Wenruo wrote:
When a ext2 fs filled with a 57M file, it's possible that convert fails
with assert in add_merge_cache_extent().
The problem is that the ext2 used space just takes some of the second
superblock.
And due to a bug in reserving superblock space, it corrupted used space
tree and cause assert.
Fix in by doing better used space merging for case where superblock
range is inside the ext2 used space.
Reported-by: Satoru Takeuchi <takeuchi_satoru@xxxxxxxxxxxxxx>
Signed-off-by: Qu Wenruo <quwenruo@xxxxxxxxxxxxxx>
The reproduce seems easy, do you have an image or test script for that?
Pach applied.
I'll modify the convert test script to make sure it will always have
enough data to cover backup super blocks.
Thanks,
Qu
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