pidgin/pidgin

Fix leak that may occur when xmlnode_from_str fails
release-2.x.y
2021-09-13, Elliott Sales de Andrade
59a77978ca08
Fix leak that may occur when xmlnode_from_str fails

The failure may occur any time in the middle of parsing, and `xpd->current` may
not actually be pointing to the root of the parsed tree. Thus we need to walk
back up before freeing the xmlnode.

Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=34988

Testing Done:
Ran the reproducer testcase on `fuzz_xml`

Reviewed at https://reviews.imfreedom.org/r/911/
/** @page savedstatus-signals Saved Status Signals
@signals
@signal savedstatus-changed
@endsignals
@see savedstatus.h
<hr>
@signaldef savedstatus-changed
@signalproto
void (*savedstatus_changed)(PurpleSavedStatus *new, PurpleSavedStatus *old);
@endsignalproto
@signaldesc
Emitted when a new saved status is activated.
@endsignaldef
*/
// vim: syntax=c.doxygen tw=75 et