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Do not access e->to->prevedge if not defined
author
thorkill
<thkr@hannover.ccc.de>
Sun, 19 Jul 2015 16:53:29 +0000
(18:53 +0200)
committer
Guus Sliepen
<guus@tinc-vpn.org>
Sun, 19 Jul 2015 20:33:43 +0000
(22:33 +0200)
In some cases - mostly when e->to == myself the prevedge is set to NULL,
causing invalid memory access. In rare cases this may lead to malformed mst
or segfaults.
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