Yonatan Goldschmidt 3a90a01dd4 Ext2FS: Fix indirect-blocks iteration ...

For singly-indirect blocks, "callback" is just "add_block".
For doubly-indirect blocks, "callback" is the lambda function
iterating on singly-indirect blocks: so instead of adding itself to the
list, the doubly-indirect block will add all its childs, but they add
themselves again when they run the callback of singly-indirect blocks.
And nothing adds the doubly-indirect block itself :(

This leads to a double free of all child blocks of the doubly-indirect
block, which is the failed assert described in #1549.

Closes: #1549.

2020-05-22 10:50:41 +02:00

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