pidgin/pidgin

Implement mitigation for GHSL-2021-045
release-2.x.y
2021-02-07, Gary Kramlich
fb2056ce3c58
Implement mitigation for GHSL-2021-045

This add a static inline version of `g_memdup2` if the version of glib we're
compiling against doesn't have the function.

GHSL-2021-045 was originally reported to glib at
https://gitlab.gnome.org/GNOME/glib/-/issues/2319.

More information about the entire situation can be found on the gnome
desktop-devel-list at
https://mail.gnome.org/archives/desktop-devel-list/2021-February/msg00000.html

Testing Done:
Compiled and ran tests locally.

Reviewed at https://reviews.imfreedom.org/r/483/
/** @page imgstore-signals Image Store Signals
@signals
@signal image-deleting
@endsignals
@see imgstore.h
<hr>
@signaldef image-deleting
@signalproto
char *(*image_deleting)(const PurpleStoredImage *img);
@endsignalproto
@signaldesc
Emitted when a #PurpleStoredImage is about to be destroyed. This allows
for what amounts to weak references. Code can hold onto a pointer to
the PurpleStoredImage without actually "holding" a reference. They can
then use a signal handler to let them know when their img is about to
be destroyed.
@param img The image about to be destroyed.
@note It's not possible to purple_imgstore_ref() img to save it.
@endsignaldef
*/
// vim: syntax=c.doxygen tw=75 et