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UBIFS: do not write rubbish into truncation scanning node
In the scanning code, in 'ubifs_add_snod()', we write rubbish into 'snod->key', because we assume that on-flash truncation nodes have a key, but they do not. If the other parts of UBIFS then mistakenly try to look-up the truncation node key (they should not do this, but may do because of a bug), we can succeed and corrupt TNC. It looks like we did have such a situation in 'sort_nodes()' in gc.c. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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@ -212,7 +212,6 @@ int ubifs_add_snod(const struct ubifs_info *c, struct ubifs_scan_leb *sleb,
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case UBIFS_DENT_NODE:
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case UBIFS_XENT_NODE:
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case UBIFS_DATA_NODE:
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case UBIFS_TRUN_NODE:
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/*
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* The key is in the same place in all keyed
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* nodes.
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