GNU bug report logs - #77478
Fixes a crash in the Haiku font driver for daemon mode

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Kyle Ambroff-Kao <kyle <at> ambroffkao.com>
To: bug-gnu-emacs <at> gnu.org
Cc: Kyle Ambroff-Kao <kyle <at> ambroffkao.com>
Subject: Fixes a crash in the Haiku font driver for daemon mode
Date: Wed, 02 Apr 2025 23:33:54 -0700

[Message part 1 (text/plain, inline)]

Tags: patch

Fix use-after-free bug in the Haiku font driver

* src/haikufont.c: Set objects freed with haikufont_close to NULL so
  they will not be reused, which seems to happen in daemon mode when all
  frames have been closed and fonts are garbage collected.

In GNU Emacs 30.1 (build 2, amd64-portbld-freebsd15.0, GTK+ Version
3.24.48, cairo version 1.18.2)
System Description: 15.0-CURRENT

Configured using:
 'configure --disable-build-details --localstatedir=/var --without-gconf
 --without-libsystemd --without-selinux --with-x --enable-acl
 --with-cairo --with-dbus --with-gif --with-gnutls --with-gsettings
 --with-x-toolkit=gtk3 --with-harfbuzz --with-jpeg
 --with-file-notification=kqueue --with-lcms2 --without-m17n-flt
 --without-imagemagick --with-mailutils --with-modules
 --with-native-compilation=aot --with-sound=oss --without-libotf
 --without-pgtk --with-png --with-toolkit-scroll-bars --with-sqlite3
 --with-rsvg --with-threads --with-tiff --with-tree-sitter --with-webp
 --without-xft --with-xim --with-xml2 --with-xpm --without-xwidgets
 --x-libraries=/usr/local/lib --x-includes=/usr/local/include
 --prefix=/usr/local --mandir=/usr/local/share/man
 --disable-silent-rules --infodir=/usr/local/share/emacs/info/
 --build=amd64-portbld-freebsd15.0 'CFLAGS=-O2 -pipe
 -fstack-protector-strong -Wl,-rpath=/usr/local/lib/gcc13 -isystem
 /usr/local/include -fno-strict-aliasing ' 'CPPFLAGS=-isystem
 /usr/local/include' 'LDFLAGS= -fstack-protector-strong
 -Wl,-rpath=/usr/local/lib/gcc13 -L/usr/local/lib/gcc13 -L/usr/local/lib
 ''

[haiku-font-double-free.diff (text/patch, attachment)]

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