rewtguy/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/
EXTRA_DIST = \
Makefile.mingw
pkgdir = $(libdir)/purple-$(PURPLE_MAJOR_VERSION)
noinst_HEADERS = sametime.h
SAMETIMESOURCES = sametime.c
AM_CFLAGS = \
$(st)
if STATIC_SAMETIME
st = -DPURPLE_STATIC_PRPL
noinst_LTLIBRARIES = libsametime.la
libsametime_la_CFLAGS = $(AM_CFLAGS)
else
st =
pkg_LTLIBRARIES = libsametime.la
endif
libsametime_la_SOURCES = $(SAMETIMESOURCES)
libsametime_la_LDFLAGS = -module -avoid-version
libsametime_la_LIBADD = $(GLIB_LIBS) $(MEANWHILE_LIBS)
AM_CPPFLAGS = \
-I$(top_srcdir)/libpurple \
-I$(top_builddir)/libpurple \
$(DEBUG_CFLAGS) \
$(GLIB_CFLAGS) \
$(MEANWHILE_CFLAGS) \
-DG_LOG_DOMAIN=\"sametime\"