After a lot of loop unwinding, during which I think it might have lost
its knowledge that `cache->buffer != NULL` (from a prior check on line
765), scan-build seems to think that there can be a `NULL` pointer
dereference of `cache->buffer` within `cache_magic_compare_to_data()`.
There can’t be. Add an assertion to try and help the analyser.
Upstreamed as
https://gitlab.freedesktop.org/xdg/xdgmime/-/merge_requests/38.
Signed-off-by: Philip Withnall <pwithnall@gnome.org>
Helps: #1767
This fixes a stack overflow reported by a user who had both the
definition of text/javascript from shared-mime-info 2.3 and the
definition of text/javascript from shared-mime-info 2.4 installed at the
same time. In 2.3, text/javascript is a subtype of
application/ecmascript, but in 2.4 application/ecmascript is a subtype
of text/javascript. Having both at the same time resulted in circular
inheritance.
The new logic keeps a list of all parents that have already been
checked, which is more comprehensive than the old workaround that was
implemented in commit 38869ece2 ("xdgmime: Prevent infinite loops from
badly-formed MIME registrations").
https://bugs.archlinux.org/task/80279
This re-applies a chunk from commit e63262d49d which was
accidentally lost when upstreaming the commit to xdgmime (as
https://gitlab.freedesktop.org/xdg/xdgmime/-/merge_requests/10).
The upstreamed commit was then re-backported to GLib as a1bfe899ab,
without the missing chunk.
The missing chunk is potentially causing incorrect content type results
for `file://` URIs when used from webkitgtk.
Thanks to Stephen Jung and Michael Catanzaro for investigating.
Signed-off-by: Philip Withnall <pwithnall@endlessos.org>
Fixes: #2639
Allocate an empty cache object, check cache objects for being empty
before using them.
Otherwise the code will re-read cache every 5 seconds, as NULL cache
does not trigger the code that stores mtime, which makes the cache
file appear modified/unloaded permanently.
https://bugzilla.gnome.org/show_bug.cgi?id=735696
Since returning exactly one match has special significance, don't
give up matching before we've found at least 2 types. Also, make
sure that we don't return the same mime type more than once.
Bug 541236.
Currently, all mime types are considered subclasses of
application/octet-stream, but according to the freedesktop
standard, everything but the inode/* types is a subclass of
application/octet-stream.
Update the special case for application/octet-stream so that all
types but inode/* will match with it and add unit test for it.
https://bugzilla.gnome.org/show_bug.cgi?id=782311
Allocate an empty cache object, check cache objects for being empty
before using them.
Otherwise the code will re-read cache every 5 seconds, as NULL cache
does not trigger the code that stores mtime, which makes the cache
file appear modified/unloaded permanently.
https://bugzilla.gnome.org/show_bug.cgi?id=735696
This commit factors out a function for comparing string suffixes, and at
the same time makes it safe for mime types that are shorter than the
"/*" suffix.
==25418== Invalid read of size 1
==25418== at 0x3C6D0F9D22: __gio_xdg_cache_mime_type_subclass (xdgmimecache.c:848)
==25418== by 0x3C6D09ED8C: g_content_type_is_a (gcontenttype.c:158)
==25418== by 0x34D8031E95: gtk_recent_filter_filter (gtkrecentfilter.c:733)
==25418== by 0x34D802F167: _gtk_recent_chooser_get_items (gtkrecentchooserutils.c:387)
==25418== by 0x34D802D07F: idle_populate_func (gtkrecentchoosermenu.c:1011)
==25418== by 0x34D7A20477: gdk_threads_dispatch (gdk.c:804)
==25418== by 0x3C6C0492F5: g_main_context_dispatch (gmain.c:3065)
==25418== by 0x3C6C049677: g_main_context_iterate.isra.23 (gmain.c:3712)
==25418== by 0x3C6C04972B: g_main_context_iteration (gmain.c:3773)
==25418== by 0x34D7FC2AF4: gtk_main_iteration (gtkmain.c:1262)
==25418== by 0x408EB4: main (in /usr/bin/glade)
https://bugzilla.gnome.org/show_bug.cgi?id=708529
Since returning exactly one match has special significance, don't
give up matching before we've found at least 2 types. Also, make
sure that we don't return the same mime type more than once.
Bug 541236.
2008-04-16 Matthias Clasen <mclasen@redhat.com>
Partically revert the last commit after realizing that
xdg_mime_media_type_equal doesn't have to init at all.
* xdgmime/xdgmime.h:
* xdgmime/xdgmime.c: Get rid of _xdg_mime_media_type_equal
* xdgmime/xdgmimecache.c: Use xdg_mime_media_type_equal
svn path=/trunk/; revision=6857
2008-04-16 Matthias Clasen <mclasen@redhat.com>
Avoid possible memory corruption in xdgmime, fd.o bug 12512,
reported by Joe Shaw and Federico Mena Quintero.
* xdgmime/xdgmime.c(_xdg_mime_media_type_equal): Implement.
(xdg_mime_media_type_equal): Turn into a wrapper around the
_-prefixed version.
* xdgmime/xdgmimecache.c: Use the _-prefixed versions of comparison
functions throughout.
svn path=/trunk/; revision=6854
2008-01-29 Alexander Larsson <alexl@redhat.com>
* gcontenttype.c:
(_g_unix_content_type_get_parents):
Use list_parents, not get_parents from xdgmime, because
the later doesn't use the cache.
* xdgmime/xdgmimecache.c:
(_xdg_mime_cache_list_mime_parents):
Don't list the same type as parent multiple times.
svn path=/trunk/; revision=6407
2007-11-26 Alexander Larsson <alexl@redhat.com>
* Makefile.am:
* configure.in:
* gio-2.0-uninstalled.pc.in:
* gio-2.0.pc.in:
* gio-unix-2.0-uninstalled.pc.in:
* gio-unix-2.0.pc.in:
* gio/
* docs/reference/gio
Merged gio-standalone into glib.
* glib/glibintl.h:
* glib/gutils.c:
Export glib_gettext so that gio can use it
Add P_ (using same domain for now)
Add I_ as g_intern_static_string
svn path=/trunk/; revision=5941
