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

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Kyle Ambroff-Kao <kyle <at> ambroffkao.com>
Subject: bug#77478: closed (Re: bug#77478: Fixes a crash in the Haiku font
 driver for daemon mode)
Date: Thu, 29 May 2025 00:26:02 +0000

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Your bug report

#77478: Fixes a crash in the Haiku font driver for daemon mode

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 77478 <at> debbugs.gnu.org.

-- 
77478: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=77478
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Po Lu <luangruo <at> yahoo.com>
To: "Kyle Ambroff-Kao" <kyle <at> ambroffkao.com>
Cc: Eli Zaretskii <eliz <at> gnu.org>, 77478-done <at> debbugs.gnu.org
Subject: Re: bug#77478: Fixes a crash in the Haiku font driver for daemon mode
Date: Thu, 29 May 2025 08:25:40 +0800

"Kyle Ambroff-Kao" <kyle <at> ambroffkao.com> writes:

> Thanks for looking into this everybody. I tested your variant of the
> fix Po and it also prevents the crash for me.

Closing, thanks.

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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 4 (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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