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#1 Yesterday 09:43:05
- trancexpress
- Member
- Registered: Yesterday
- Posts: 4
[SOLVED] Buffer overflow detected on update to fontconfig-2:2.17.0-1
Hi all,
today I did my daily (excluding Saturday) "pacman -Syu", as a result KDE stopped showing its logging screen (there was just a black screen with my mouse cursor moving). I was able to switch sessions (Ctrl+Alt+F3), login from command line and start with "startplasma-wayland", but the usual login screen didn't work.
After some downgrading, the only 2 packages left to downgrade are:
fontconfig-2:2.17.0-1
lib32-fontconfig-2:2.17.0-1Updating those 2 packages results in the black screen with cursor instead of KDE login screen.
After again downgrading, the login problem is again gone:
pacman -U [url]https://archive.archlinux.org/packages/f/fontconfig/fontconfig-2:2.16.2-1-x86_64.pkg.tar.zst[/url] [url]https://archive.archlinux.org/packages/l/lib32-fontconfig/lib32-fontconfig-2:2.16.2-1-x86_64.pkg.tar.zst[/url]When trying to update `fontconfig` or `lib32-contconfig`, there are errors on the command line:
➜ ~ sudo pacman -S fontconfig
resolving dependencies...
looking for conflicting packages...
Packages (1) fontconfig-2:2.17.0-1
Total Installed Size: 1.12 MiB
Net Upgrade Size: 0.01 MiB
:: Proceed with installation? [Y/n] Y
(1/1) checking keys in keyring [#######################################################################################] 100%
(1/1) checking package integrity [#######################################################################################] 100%
(1/1) loading package files [#######################################################################################] 100%
(1/1) checking for file conflicts [#######################################################################################] 100%
(1/1) checking available disk space [#######################################################################################] 100%
:: Processing package changes...
(1/1) upgrading fontconfig [#######################################################################################] 100%
Rebuilding fontconfig cache...
*** buffer overflow detected ***: terminated
/tmp/alpm_UAE6YC/.INSTALL: line 1: 2220 Aborted (core dumped) /usr/bin/fc-cache -rs
error: command failed to execute correctly
:: Running post-transaction hooks...
(1/5) Arming ConditionNeedsUpdate...
(2/5) Updating fontconfig configuration...
(3/5) Refreshing PackageKit...
(4/5) Updating fontconfig cache...
*** buffer overflow detected ***: terminated
error: command terminated by signal 6: Aborted
(5/5) Updating 32-bit fontconfig cache...Here is what requires both:
➜ ~ sudo pacman -R lib32-fontconfig fontconfig
checking dependencies...
error: failed to prepare transaction (could not satisfy dependencies)
:: removing fontconfig breaks dependency 'fontconfig' required by appstream
:: removing fontconfig breaks dependency 'fontconfig' required by appstream-glib
:: removing fontconfig breaks dependency 'fontconfig' required by avidemux-cli
:: removing fontconfig breaks dependency 'fontconfig' required by cairo
:: removing fontconfig breaks dependency 'fontconfig' required by efl
:: removing fontconfig breaks dependency 'fontconfig' required by electron31
:: removing fontconfig breaks dependency 'libfontconfig.so=1-64' required by electron31
:: removing fontconfig breaks dependency 'fontconfig' required by electron32
:: removing fontconfig breaks dependency 'libfontconfig.so=1-64' required by electron32
:: removing fontconfig breaks dependency 'fontconfig' required by electron33
:: removing fontconfig breaks dependency 'libfontconfig.so=1-64' required by electron33
:: removing fontconfig breaks dependency 'fontconfig' required by electron34
:: removing fontconfig breaks dependency 'libfontconfig.so=1-64' required by electron34
:: removing fontconfig breaks dependency 'fontconfig' required by electron35
:: removing fontconfig breaks dependency 'libfontconfig.so=1-64' required by electron35
:: removing fontconfig breaks dependency 'fontconfig' required by electron36
:: removing fontconfig breaks dependency 'libfontconfig.so=1-64' required by electron36
:: removing fontconfig breaks dependency 'fontconfig' required by ffmpeg
:: removing fontconfig breaks dependency 'fontconfig' required by ffmpeg4.4
:: removing fontconfig breaks dependency 'fontconfig' required by fltk
:: removing fontconfig breaks dependency 'libfontconfig.so=1-64' required by fltk
:: removing fontconfig breaks dependency 'fontconfig' required by gd
:: removing fontconfig breaks dependency 'fontconfig' required by ghostscript
:: removing fontconfig breaks dependency 'fontconfig' required by gimp
:: removing fontconfig breaks dependency 'fontconfig' required by gtk2
:: removing fontconfig breaks dependency 'fontconfig' required by gtk3
:: removing fontconfig breaks dependency 'fontconfig' required by gtk4
:: removing fontconfig breaks dependency 'fontconfig' required by imagemagick
:: removing lib32-fontconfig breaks dependency 'lib32-fontconfig' required by lib32-cairo
:: removing fontconfig breaks dependency 'fontconfig' required by libass
:: removing fontconfig breaks dependency 'fontconfig' required by libbluray
:: removing fontconfig breaks dependency 'fontconfig' required by libcupsfilters
:: removing fontconfig breaks dependency 'fontconfig' required by libgdiplus
:: removing fontconfig breaks dependency 'fontconfig' required by libreoffice-still
:: removing fontconfig breaks dependency 'fontconfig' required by libxft
:: removing fontconfig breaks dependency 'fontconfig' required by openscenegraph
:: removing fontconfig breaks dependency 'fontconfig' required by pango
:: removing fontconfig breaks dependency 'fontconfig' required by plasma-workspace
:: removing fontconfig breaks dependency 'fontconfig' required by poppler
:: removing fontconfig breaks dependency 'fontconfig' required by qt5-base
:: removing fontconfig breaks dependency 'fontconfig' required by qt6-base
:: removing fontconfig breaks dependency 'fontconfig' required by qt6-webengine
:: removing lib32-fontconfig breaks dependency 'lib32-fontconfig' required by steam
:: removing fontconfig breaks dependency 'fontconfig' required by texlive-bin
:: removing fontconfig breaks dependency 'fontconfig' required by vlc
:: removing fontconfig breaks dependency 'fontconfig' required by webkit2gtk
:: removing fontconfig breaks dependency 'fontconfig' required by webkit2gtk-4.1
:: removing fontconfig breaks dependency 'fontconfig' required by wine
:: removing fontconfig breaks dependency 'fontconfig' required by wxwidgets-gtk3
:: removing fontconfig breaks dependency 'fontconfig' required by xorg-x11perfWhere do I go from here? Do I need to run some command prior to updating the packages? Do I need to report a bug somewhere?
I would like to keep my system up-to-date.
Best regards and thanks,
Simeon
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
The update problem was resolved by removing font: LateefGR-Regular.ttf
The package for that was:
ttf-sil-lateefFor others, removing this font helped: DaiBannaSIL-Bold.ttf
The bug is tracked here: https://gitlab.freedesktop.org/fontconf … issues/481
Last edited by trancexpress (Yesterday 14:58:14)
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#2 Yesterday 09:51:02
- seth
- Member
- Registered: 2012-09-03
- Posts: 65,075
Re: [SOLVED] Buffer overflow detected on update to fontconfig-2:2.17.0-1
"/usr/bin/fc-cache -rs" segfaults and leaves a core dump behind, https://wiki.archlinux.org/title/Core_d … _core_dump
sudo fc-cache -rsvmight hint which font is causing this
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#3 Yesterday 10:00:04
- trancexpress
- Member
- Registered: Yesterday
- Posts: 4
Re: [SOLVED] Buffer overflow detected on update to fontconfig-2:2.17.0-1
Thank you for the help!
"/usr/bin/fc-cache -rs" segfaults and leaves a core dump behind, https://wiki.archlinux.org/title/Core_d … _core_dump
I'm not sure that is the case, am I missing a core dump from "fc-cache" below?
➜ ~ ls -ltr /var/lib/systemd/coredump/
total 323556
-rw-r-----+ 1 root root 65565019 Jun 19 21:37 core.steamwebhelper.1000.9b238c610a7b451db1a52b841b24dd1c.2327.1750358256000000.zst
-rw-r-----+ 1 root root 821393 Jun 20 15:13 core.veracrypt.1000.72bbcb4201e941f388b56f720f6cf9a3.69387.1750421634000000.zst
-rw-r-----+ 1 root root 6437405 Jun 24 16:49 core.dolphin.1000.0aad9f2f2a654158a67bdb1b810491a2.103251.1750772945000000.zst
-rw-r----- 1 root root 11127271 Jun 26 20:28 core.kwin_wayland.1000.892206bfcc3a4cd8a5435c0810b7e5e6.1097.1750958888000000.zst
-rw-r-----+ 1 root root 15055139 Jun 26 20:28 core.Discord.1000.892206bfcc3a4cd8a5435c0810b7e5e6.5409.1750958889000000.zst
-rw-r-----+ 1 root root 110325299 Jun 26 20:28 core.librewolf.1000.892206bfcc3a4cd8a5435c0810b7e5e6.5562.1750958890000000.zst
-rw-r-----+ 1 root root 67105773 Jun 26 20:28 core.Discord.1000.892206bfcc3a4cd8a5435c0810b7e5e6.5681.1750958890000000.zst
-rw-r-----+ 1 root root 3772992 Jun 26 21:03 core.xdg-desktop-por.1000.892206bfcc3a4cd8a5435c0810b7e5e6.119645.1750961029000000.zst
-rw-r-----+ 1 root root 823480 Jun 27 13:49 core.veracrypt.1000.e7a4561d0b084332b96d3ad1e829d1f1.65573.1751021350000000.zst
-rw-r----- 1 root root 3811393 Jun 29 09:44 core.sddm-greeter-qt.972.c395b66543ba48df9036bc82bbbc6ed4.925.1751179457000000.zst
-rw-r----- 1 root root 3794347 Jun 29 09:46 core.sddm-greeter-qt.972.ce7d6a5a27064a1788c19c119912ef7e.942.1751179619000000.zst
-rw-r----- 1 root root 3803588 Jun 29 09:52 core.sddm-greeter-qt.972.ea3323047b6d4266967252bd6f9307a7.929.1751179929000000.zst
-rw-r----- 1 root root 3797457 Jun 29 10:05 core.sddm-greeter-qt.972.24be76a5dfcd49cab932703764c6ca1b.933.1751180702000000.zst
-rw-r----- 1 root root 3800411 Jun 29 10:10 core.sddm-greeter-qt.972.0cdb8b34ba264444abc70e85cb363dca.922.1751181033000000.zst
-rw-r----- 1 root root 3802337 Jun 29 10:12 core.sddm-greeter-qt.972.60cf28f01bb44f10af71960a4cf9a8bf.905.1751181134000000.zst
-rw-r----- 1 root root 3813562 Jun 29 10:15 core.sddm-greeter-qt.972.88997047907041e4b2404b8ff31a0c57.937.1751181310000000.zst
-rw-r----- 1 root root 3804685 Jun 29 10:19 core.sddm-greeter-qt.972.148269c406434356ba38ae45b472093b.941.1751181544000000.zst
-rw-r----- 1 root root 3796155 Jun 29 10:33 core.sddm-greeter-qt.972.dc81c43579434bf3a1600462ef3a630b.932.1751182406000000.zst
-rw-r-----+ 1 root root 712991 Jun 29 10:33 core.kde-open.1000.dc81c43579434bf3a1600462ef3a630b.1173.1751182439000000.zst
-rw-r----- 1 root root 3787917 Jun 29 10:41 core.sddm-greeter-qt.972.1e7579f6e95d46a59c854f4f29f652b9.946.1751182882000000.zst
-rw-r----- 1 root root 3800357 Jun 29 10:51 core.sddm-greeter-qt.972.2d0998ade9994dec817ab4463b1d1890.938.1751183517000000.zst
-rw-r----- 1 root root 3802896 Jun 29 10:58 core.sddm-greeter-qt.972.604d225a2f834c0da448c61f10fa3695.923.1751183934000000.zst
-rw-r----- 1 root root 3804803 Jun 29 12:32 core.sddm-greeter-qt.972.9456234ebd324b42841d72d7f17f65de.925.1751189562000000.zst➜ ~ coredumpctl list
...
Thu 2025-06-26 20:28:09 EEST 1097 1000 1000 SIGABRT inaccessible /usr/bin/kwin_wayland -
Thu 2025-06-26 20:28:13 EEST 5409 1000 1000 SIGTRAP present /opt/discord/Discord 14.3M
Thu 2025-06-26 20:28:13 EEST 5562 1000 1000 SIGSEGV present /usr/lib/librewolf/librewolf 105.2M
Thu 2025-06-26 20:28:19 EEST 5681 1000 1000 SIGABRT present /opt/discord/Discord 63.9M
Thu 2025-06-26 21:03:49 EEST 119645 1000 1000 SIGSEGV present /usr/lib/xdg-desktop-portal-kde 3.5M
Fri 2025-06-27 13:49:10 EEST 65573 1000 1000 SIGABRT present /usr/bin/veracrypt 804.1K
Sun 2025-06-29 10:33:59 EEST 1173 1000 1000 SIGABRT present /usr/bin/kde-open 696.2K➜ ~ coredumpctl info
Hint: You are currently not seeing messages from other users and the system.
Users in groups 'adm', 'systemd-journal', 'wheel' can see all messages.
Pass -q to turn off this notice.
PID: 1173 (kde-open)
UID: 1000 (sandreev)
GID: 1000 (sandreev)
Signal: 6 (ABRT)
Timestamp: Sun 2025-06-29 10:33:59 EEST (2h 24min ago)
Command Line: kde-open
Executable: /usr/bin/kde-open
Control Group: /user.slice/user-1000.slice/session-2.scope
Unit: session-2.scope
Slice: user-1000.slice
Session: 2
Owner UID: 1000 (sandreev)
Boot ID: dc81c43579434bf3a1600462ef3a630b
Machine ID: 433c10ccc2ea4da385beba4075176bf7
Hostname: hotride
Storage: /var/lib/systemd/coredump/core.kde-open.1000.dc81c43579434bf3a1600462ef3a630b.1173.1751182439000000.zst (present)
Size on Disk: 696.2K
Message: Process 1173 (kde-open) of user 1000 dumped core.
Stack trace of thread 1173:
#0 0x00007fe925aa774c n/a (libc.so.6 + 0x9774c)
#1 0x00007fe925a4ddc0 raise (libc.so.6 + 0x3ddc0)
#2 0x00007fe925a3557a abort (libc.so.6 + 0x2557a)
#3 0x00007fe926091217 n/a (libQt6Core.so.6 + 0x91217)
#4 0x00007fe9260920ec _ZNK14QMessageLogger5fatalEPKcz (libQt6Core.so.6 + 0x920ec)
#5 0x00007fe9268e215a n/a (libQt6Gui.so.6 + 0xe215a)
#6 0x00007fe926998438 _ZN22QGuiApplicationPrivate21createEventDispatcherEv (libQt6Gui.so.6 + 0x198438)
#7 0x00007fe92616c0f5 _ZN23QCoreApplicationPrivate4initEv (libQt6Core.so.6 + 0x16c0f5)
#8 0x00007fe9269984ce _ZN22QGuiApplicationPrivate4initEv (libQt6Gui.so.6 + 0x1984ce)
#9 0x00007fe9272fa766 _ZN19QApplicationPrivate4initEv (libQt6Widgets.so.6 + 0xfa766)
#10 0x000055fcfdbf8156 n/a (/usr/bin/kde-open + 0x5156)
#11 0x00007fe925a376b5 n/a (libc.so.6 + 0x276b5)
#12 0x00007fe925a37769 __libc_start_main (libc.so.6 + 0x27769)
#13 0x000055fcfdbf8e95 n/a (/usr/bin/kde-open + 0x5e95)
ELF object binary architecture: AMD x86-64sudo fc-cache -rsvmight hint which font is causing this
Before updating:
➜ ~ sudo fc-cache -rsv
[sudo] password for root:
Font directories:
/usr/share/fonts
/usr/local/share/fonts
/usr/share/fonts/100dpi
/usr/share/fonts/75dpi
/usr/share/fonts/Adwaita
/usr/share/fonts/TTF
/usr/share/fonts/adobe-source-code-pro
/usr/share/fonts/cantarell
/usr/share/fonts/encodings
/usr/share/fonts/gnu-free
/usr/share/fonts/gsfonts
/usr/share/fonts/liberation
/usr/share/fonts/mathjax2
/usr/share/fonts/noto
/usr/share/fonts/util
/usr/share/fonts/wenquanyi
/usr/share/fonts/TTF/arabeyes
/usr/share/fonts/encodings/large
/usr/share/fonts/mathjax2/HTML-CSS
/usr/share/fonts/wenquanyi/wqy-zenhei
/usr/share/fonts/mathjax2/HTML-CSS/Asana-Math
/usr/share/fonts/mathjax2/HTML-CSS/Gyre-Pagella
/usr/share/fonts/mathjax2/HTML-CSS/Gyre-Termes
/usr/share/fonts/mathjax2/HTML-CSS/Latin-Modern
/usr/share/fonts/mathjax2/HTML-CSS/Neo-Euler
/usr/share/fonts/mathjax2/HTML-CSS/STIX-Web
/usr/share/fonts/mathjax2/HTML-CSS/TeX
/usr/share/fonts/mathjax2/HTML-CSS/Asana-Math/woff
/usr/share/fonts/mathjax2/HTML-CSS/Gyre-Pagella/woff
/usr/share/fonts/mathjax2/HTML-CSS/Gyre-Termes/woff
/usr/share/fonts/mathjax2/HTML-CSS/Latin-Modern/woff
/usr/share/fonts/mathjax2/HTML-CSS/Neo-Euler/woff
/usr/share/fonts/mathjax2/HTML-CSS/STIX-Web/woff
/usr/share/fonts/mathjax2/HTML-CSS/TeX/woff
/usr/share/fonts: caching, new cache contents: 0 fonts, 14 dirs
/usr/share/fonts/100dpi: caching, new cache contents: 398 fonts, 0 dirs
/usr/share/fonts/75dpi: caching, new cache contents: 398 fonts, 0 dirs
/usr/share/fonts/Adwaita: caching, new cache contents: 24 fonts, 0 dirs
/usr/share/fonts/TTF: caching, new cache contents: 186 fonts, 1 dirs
/usr/share/fonts/TTF/arabeyes: caching, new cache contents: 72 fonts, 0 dirs
/usr/share/fonts/adobe-source-code-pro: caching, new cache contents: 30 fonts, 0 dirs
/usr/share/fonts/cantarell: caching, new cache contents: 6 fonts, 0 dirs
/usr/share/fonts/encodings: caching, new cache contents: 0 fonts, 1 dirs
/usr/share/fonts/encodings/large: caching, new cache contents: 0 fonts, 0 dirs
/usr/share/fonts/gnu-free: caching, new cache contents: 12 fonts, 0 dirs
/usr/share/fonts/gsfonts: caching, new cache contents: 35 fonts, 0 dirs
/usr/share/fonts/liberation: caching, new cache contents: 12 fonts, 0 dirs
/usr/share/fonts/mathjax2: caching, new cache contents: 0 fonts, 1 dirs
/usr/share/fonts/mathjax2/HTML-CSS: caching, new cache contents: 0 fonts, 7 dirs
/usr/share/fonts/mathjax2/HTML-CSS/Asana-Math: caching, new cache contents: 0 fonts, 1 dirs
/usr/share/fonts/mathjax2/HTML-CSS/Asana-Math/woff: caching, new cache contents: 23 fonts, 0 dirs
/usr/share/fonts/mathjax2/HTML-CSS/Gyre-Pagella: caching, new cache contents: 0 fonts, 1 dirs
/usr/share/fonts/mathjax2/HTML-CSS/Gyre-Pagella/woff: caching, new cache contents: 23 fonts, 0 dirs
/usr/share/fonts/mathjax2/HTML-CSS/Gyre-Termes: caching, new cache contents: 0 fonts, 1 dirs
/usr/share/fonts/mathjax2/HTML-CSS/Gyre-Termes/woff: caching, new cache contents: 23 fonts, 0 dirs
/usr/share/fonts/mathjax2/HTML-CSS/Latin-Modern: caching, new cache contents: 0 fonts, 1 dirs
/usr/share/fonts/mathjax2/HTML-CSS/Latin-Modern/woff: caching, new cache contents: 24 fonts, 0 dirs
/usr/share/fonts/mathjax2/HTML-CSS/Neo-Euler: caching, new cache contents: 0 fonts, 1 dirs
/usr/share/fonts/mathjax2/HTML-CSS/Neo-Euler/woff: caching, new cache contents: 17 fonts, 0 dirs
/usr/share/fonts/mathjax2/HTML-CSS/STIX-Web: caching, new cache contents: 0 fonts, 1 dirs
/usr/share/fonts/mathjax2/HTML-CSS/STIX-Web/woff: caching, new cache contents: 55 fonts, 0 dirs
/usr/share/fonts/mathjax2/HTML-CSS/TeX: caching, new cache contents: 0 fonts, 1 dirs
/usr/share/fonts/mathjax2/HTML-CSS/TeX/woff: caching, new cache contents: 22 fonts, 0 dirs
/usr/share/fonts/noto: caching, new cache contents: 613 fonts, 0 dirs
/usr/share/fonts/util: caching, new cache contents: 0 fonts, 0 dirs
/usr/share/fonts/wenquanyi: caching, new cache contents: 0 fonts, 1 dirs
/usr/share/fonts/wenquanyi/wqy-zenhei: caching, new cache contents: 3 fonts, 0 dirs
/usr/local/share/fonts: skipping, no such directory
/usr/share/fonts/100dpi: skipping, looped directory detected
/usr/share/fonts/75dpi: skipping, looped directory detected
/usr/share/fonts/Adwaita: skipping, looped directory detected
/usr/share/fonts/TTF: skipping, looped directory detected
/usr/share/fonts/adobe-source-code-pro: skipping, looped directory detected
/usr/share/fonts/cantarell: skipping, looped directory detected
/usr/share/fonts/encodings: skipping, looped directory detected
/usr/share/fonts/gnu-free: skipping, looped directory detected
/usr/share/fonts/gsfonts: skipping, looped directory detected
/usr/share/fonts/liberation: skipping, looped directory detected
/usr/share/fonts/mathjax2: skipping, looped directory detected
/usr/share/fonts/noto: skipping, looped directory detected
/usr/share/fonts/util: skipping, looped directory detected
/usr/share/fonts/wenquanyi: skipping, looped directory detected
/usr/share/fonts/TTF/arabeyes: skipping, looped directory detected
/usr/share/fonts/encodings/large: skipping, looped directory detected
/usr/share/fonts/mathjax2/HTML-CSS: skipping, looped directory detected
/usr/share/fonts/wenquanyi/wqy-zenhei: skipping, looped directory detected
/usr/share/fonts/mathjax2/HTML-CSS/Asana-Math: skipping, looped directory detected
/usr/share/fonts/mathjax2/HTML-CSS/Gyre-Pagella: skipping, looped directory detected
/usr/share/fonts/mathjax2/HTML-CSS/Gyre-Termes: skipping, looped directory detected
/usr/share/fonts/mathjax2/HTML-CSS/Latin-Modern: skipping, looped directory detected
/usr/share/fonts/mathjax2/HTML-CSS/Neo-Euler: skipping, looped directory detected
/usr/share/fonts/mathjax2/HTML-CSS/STIX-Web: skipping, looped directory detected
/usr/share/fonts/mathjax2/HTML-CSS/TeX: skipping, looped directory detected
/usr/share/fonts/mathjax2/HTML-CSS/Asana-Math/woff: skipping, looped directory detected
/usr/share/fonts/mathjax2/HTML-CSS/Gyre-Pagella/woff: skipping, looped directory detected
/usr/share/fonts/mathjax2/HTML-CSS/Gyre-Termes/woff: skipping, looped directory detected
/usr/share/fonts/mathjax2/HTML-CSS/Latin-Modern/woff: skipping, looped directory detected
/usr/share/fonts/mathjax2/HTML-CSS/Neo-Euler/woff: skipping, looped directory detected
/usr/share/fonts/mathjax2/HTML-CSS/STIX-Web/woff: skipping, looped directory detected
/usr/share/fonts/mathjax2/HTML-CSS/TeX/woff: skipping, looped directory detected
/var/cache/fontconfig: cleaning cache directory
fc-cache: succeededAfter updating:
➜ ~ sudo fc-cache -rsv
*** buffer overflow detected ***: terminatedLast edited by trancexpress (Yesterday 10:03:24)
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#4 Yesterday 10:16:00
- epsiloneridani
- Member
- Registered: 2023-05-08
- Posts: 5
- Website
Re: [SOLVED] Buffer overflow detected on update to fontconfig-2:2.17.0-1
I have had this exact same problem since yesterday. In my case, this also breaks gdm and (presumably) steam-native.
Last edited by epsiloneridani (Yesterday 10:26:12)
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#5 Yesterday 10:19:24
- seth
- Member
- Registered: 2012-09-03
- Posts: 65,075
Re: [SOLVED] Buffer overflow detected on update to fontconfig-2:2.17.0-1
# gdb fc-cache -rs
# strace -o /tmp/fc-cache.strace fc-cache -rsOnline
#6 Yesterday 10:24:02
- epsiloneridani
- Member
- Registered: 2023-05-08
- Posts: 5
- Website
Re: [SOLVED] Buffer overflow detected on update to fontconfig-2:2.17.0-1
The last font that it appears to check for me is "/usr/share/fonts/dai-banna-sil/DaiBannaSIL-Bold.ttf", owned by ttf-google-fonts-git. Removing that package completely fixes the issue. Thank you!
Offline
#7 Yesterday 10:26:55
- trancexpress
- Member
- Registered: Yesterday
- Posts: 4
Re: [SOLVED] Buffer overflow detected on update to fontconfig-2:2.17.0-1
➜ ~ sudo pacman -S fontconfig
[sudo] password for root:
resolving dependencies...
looking for conflicting packages...
Packages (1) fontconfig-2:2.17.0-1
Total Installed Size: 1.12 MiB
Net Upgrade Size: 0.01 MiB
:: Proceed with installation? [Y/n]
(1/1) checking keys in keyring [#######################################################################################] 100%
(1/1) checking package integrity [#######################################################################################] 100%
(1/1) loading package files [#######################################################################################] 100%
(1/1) checking for file conflicts [#######################################################################################] 100%
(1/1) checking available disk space [#######################################################################################] 100%
:: Processing package changes...
(1/1) upgrading fontconfig [#######################################################################################] 100%
Rebuilding fontconfig cache...
*** buffer overflow detected ***: terminated
/tmp/alpm_dSWm61/.INSTALL: line 1: 12305 Aborted (core dumped) /usr/bin/fc-cache -rs
error: command failed to execute correctly
:: Running post-transaction hooks...
(1/5) Arming ConditionNeedsUpdate...
(2/5) Updating fontconfig configuration...
(3/5) Refreshing PackageKit...
(4/5) Updating fontconfig cache...
*** buffer overflow detected ***: terminated
error: command terminated by signal 6: Aborted
(5/5) Updating 32-bit fontconfig cache...➜ ~ gdb --args fc-cache -rs
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Reading symbols from fc-cache...
Downloading separate debug info for /usr/bin/fc-cache
Reading symbols from /home/sandreev/.cache/debuginfod_client/6049d5ddbe43a31103944e57a9dcd7836ef2b0c7/debuginfo...
(gdb) run
Starting program: /usr/bin/fc-cache -rs
Downloading 2.21 M separate debug info for /usr/lib/libfontconfig.so.1
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
*** buffer overflow detected ***: terminated
Program received signal SIGABRT, Aborted.
Downloading source file /usr/src/debug/glibc/glibc/nptl/pthread_kill.c
__pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at pthread_kill.c:44
44 return INTERNAL_SYSCALL_ERROR_P (ret) ? INTERNAL_SYSCALL_ERRNO (ret) : 0;
(gdb) bt
#0 __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at pthread_kill.c:44
#1 0x00007ffff7dd7813 in __pthread_kill_internal (threadid=<optimized out>, signo=6) at pthread_kill.c:89
#2 0x00007ffff7d7ddc0 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
#3 0x00007ffff7d6557a in __GI_abort () at abort.c:73
#4 0x00007ffff7d665c9 in __libc_message_impl (fmt=fmt@entry=0x7ffff7ef2216 "*** %s ***: terminated\n") at ../sysdeps/posix/libc_fatal.c:134
#5 0x00007ffff7e64a09 in __GI___fortify_fail (msg=msg@entry=0x7ffff7ef21fd "buffer overflow detected") at fortify_fail.c:24
#6 0x00007ffff7e64374 in __GI___chk_fail () at chk_fail.c:28
#7 0x00007ffff7f4b4c1 in strcpy (__dest=<optimized out>, __src=<optimized out>, __dest=<optimized out>, __src=<optimized out>) at /usr/include/bits/string_fortified.h:81
#8 FcFontCapabilities (face=0x5555555f8250) at ../fontconfig/src/fcfreetype.c:2671
#9 FcFreeTypeQueryFaceInternal (face=0x5555555f8250, file=file@entry=0x5555555f2c10 "/usr/share/fonts/TTF/LateefGR-Regular.ttf", id=id@entry=0, cs_share=cs_share@entry=0x7fffffffd5c0, ls_share=ls_share@entry=0x7fffffffd5b8,
nm_share=nm_share@entry=0x7fffffffd5b0) at ../fontconfig/src/fcfreetype.c:1774
#10 0x00007ffff7f4d56c in IA__FcFreeTypeQueryAll (file=file@entry=0x5555555f2c10 "/usr/share/fonts/TTF/LateefGR-Regular.ttf", id=0, id@entry=4294967295, blanks=blanks@entry=0x0, count=count@entry=0x0, set=set@entry=0x5555555f2810)
at ../fontconfig/src/fcfreetype.c:2217
#11 0x00007ffff7f4daa2 in FcFileScanFontConfig (set=0x5555555f2810, file=0x5555555f2c10 "/usr/share/fonts/TTF/LateefGR-Regular.ttf", config=0x55555555f570) at ../fontconfig/src/fcdir.c:90
#12 FcFileScanConfig (set=set@entry=0x5555555f2810, dirs=dirs@entry=0x5555555f2790, file=0x5555555f2c10 "/usr/share/fonts/TTF/LateefGR-Regular.ttf", config=config@entry=0x55555555f570) at ../fontconfig/src/fcdir.c:159
#13 0x00007ffff7f4e0ec in FcDirScanConfig (set=set@entry=0x5555555f2810, dirs=dirs@entry=0x5555555f2790, dir=dir@entry=0x5555555f0fb0 "/usr/share/fonts/TTF", force=force@entry=1, config=config@entry=0x55555555f570)
at ../fontconfig/src/fcdir.c:276
#14 0x00007ffff7f4e319 in FcDirCacheScan (dir=0x5555555f0fb0 "/usr/share/fonts/TTF", config=0x55555555f570) at ../fontconfig/src/fcdir.c:356
#15 0x00007ffff7f3c7fa in IA__FcDirCacheRead (dir=0x5555555f0fb0 "/usr/share/fonts/TTF", force=0, config=0x55555555f570) at ../fontconfig/src/fcdir.c:465
#16 FcConfigAddDirList (config=config@entry=0x55555555f570, set=set@entry=FcSetSystem, dirSet=0x55555555f6c0) at ../fontconfig/src/fccfg.c:524
#17 0x00007ffff7f3c8b8 in IA__FcConfigBuildFonts (config=config@entry=0x55555555f570) at ../fontconfig/src/fccfg.c:557
#18 0x00007ffff7f3d740 in IA__FcConfigSetCurrent (config=config@entry=0x55555555f570) at ../fontconfig/src/fccfg.c:576
#19 0x00005555555561a0 in main (argc=<optimized out>, argv=0x7fffffffdb48) at ../fontconfig/fc-cache/fc-cache.c:365➜ ~ ls -ltr /var/lib/systemd/coredump/
...
-rw-r-----+ 1 root root 204365 Jun 29 13:23 core.fc-cache.1000.794607c710dd4ecebeb4370c89054c39.12523.1751192629000000.zst➜ ~ coredumpctl info fc-cache
Hint: You are currently not seeing messages from other users and the system.
Users in groups 'adm', 'systemd-journal', 'wheel' can see all messages.
Pass -q to turn off this notice.
PID: 12523 (fc-cache)
UID: 1000 (sandreev)
GID: 1000 (sandreev)
Signal: 6 (ABRT)
Timestamp: Sun 2025-06-29 13:23:49 EEST (29s ago)
Command Line: fc-cache -rs
Executable: /usr/bin/fc-cache
Control Group: /user.slice/user-1000.slice/user@1000.service/app.slice/app-org.kde.konsole@4112d678a8e64eb8afaac6a4c680808c.service
Unit: user@1000.service
User Unit: app-org.kde.konsole@4112d678a8e64eb8afaac6a4c680808c.service
Slice: user-1000.slice
Owner UID: 1000 (sandreev)
Boot ID: 794607c710dd4ecebeb4370c89054c39
Machine ID: 433c10ccc2ea4da385beba4075176bf7
Hostname: hotride
Storage: /var/lib/systemd/coredump/core.fc-cache.1000.794607c710dd4ecebeb4370c89054c39.12523.1751192629000000.zst (present)
Size on Disk: 199.5K
Message: Process 12523 (fc-cache) of user 1000 dumped core.
Stack trace of thread 12523:
#0 0x00007f8b843c574c n/a (libc.so.6 + 0x9774c)
#1 0x00007f8b8436bdc0 raise (libc.so.6 + 0x3ddc0)
#2 0x00007f8b8435357a abort (libc.so.6 + 0x2557a)
#3 0x00007f8b843545c9 n/a (libc.so.6 + 0x265c9)
#4 0x00007f8b84452a09 __fortify_fail (libc.so.6 + 0x124a09)
#5 0x00007f8b84452374 __chk_fail (libc.so.6 + 0x124374)
#6 0x00007f8b845394c1 n/a (libfontconfig.so.1 + 0x1b4c1)
#7 0x00007f8b8453b56c FcFreeTypeQueryAll (libfontconfig.so.1 + 0x1d56c)
#8 0x00007f8b8453baa2 n/a (libfontconfig.so.1 + 0x1daa2)
#9 0x00007f8b8453c0ec n/a (libfontconfig.so.1 + 0x1e0ec)
#10 0x00007f8b8453c319 n/a (libfontconfig.so.1 + 0x1e319)
#11 0x00007f8b8452a7fa n/a (libfontconfig.so.1 + 0xc7fa)
#12 0x00007f8b8452a8b8 FcConfigBuildFonts (libfontconfig.so.1 + 0xc8b8)
#13 0x00007f8b8452b740 FcConfigSetCurrent (libfontconfig.so.1 + 0xd740)
#14 0x000055e33d7a71a0 n/a (/usr/bin/fc-cache + 0x21a0)
#15 0x00007f8b843556b5 n/a (libc.so.6 + 0x276b5)
#16 0x00007f8b84355769 __libc_start_main (libc.so.6 + 0x27769)
#17 0x000055e33d7a74b5 n/a (/usr/bin/fc-cache + 0x24b5)
ELF object binary architecture: AMD x86-64So something with this font?
/usr/share/fonts/TTF/LateefGR-Regular.ttfOffline
#8 Yesterday 10:29:05
- epsiloneridani
- Member
- Registered: 2023-05-08
- Posts: 5
- Website
Re: [SOLVED] Buffer overflow detected on update to fontconfig-2:2.17.0-1
You can use "pacman -Qo /usr/share/fonts/TTF/LateefGR-Regular.ttf" to find out which package owns the font.
Last edited by epsiloneridani (Yesterday 10:29:35)
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#9 Yesterday 10:31:26
- seth
- Member
- Registered: 2012-09-03
- Posts: 65,075
Re: [SOLVED] Buffer overflow detected on update to fontconfig-2:2.17.0-1
https://gitlab.freedesktop.org/fontconf … issues/481
Even if, doesn't justify the overflow.
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#10 Yesterday 10:32:46
- epsiloneridani
- Member
- Registered: 2023-05-08
- Posts: 5
- Website
Re: [SOLVED] Buffer overflow detected on update to fontconfig-2:2.17.0-1
Yes, I agree. This can be used for DOS attacks.
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#11 Yesterday 10:34:34
- vence
- Member
- Registered: 2021-11-04
- Posts: 2
Re: [SOLVED] Buffer overflow detected on update to fontconfig-2:2.17.0-1
As follows from https://gitlab.freedesktop.org/fontconf … te_2982078, the crash is caused by DaiBannaSIL-Bold.ttf font. With this font removed, I have no problems with fontconfig-2:2.17.0-1.
(Dai Banna SIL is a Unicode font for New Tai Lue characters. It was installed in ttf-google-fonts-git packages from AUR, but as a matter of fact, I do not need this font at all)
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#12 Yesterday 10:36:29
- trancexpress
- Member
- Registered: Yesterday
- Posts: 4
Re: [SOLVED] Buffer overflow detected on update to fontconfig-2:2.17.0-1
➜ ~ sudo pacman -R ttf-sil-lateef
checking dependencies...
Packages (1) ttf-sil-lateef-1.200-7
Total Removed Size: 0.69 MiB
:: Do you want to remove these packages? [Y/n] Y
:: Processing package changes...
(1/1) removing ttf-sil-lateef [#######################################################################################] 100%
:: Running post-transaction hooks...
(1/5) Arming ConditionNeedsUpdate...
(2/5) Refreshing PackageKit...
(3/5) Updating fontconfig cache...
(4/5) Updating 32-bit fontconfig cache...
(5/5) Updating X fontdir indices...➜ ~ sudo pacman -Syu
:: Synchronizing package databases...
core is up to date
extra is up to date
multilib is up to date
:: Starting full system upgrade...
resolving dependencies...
looking for conflicting packages...
Packages (2) fontconfig-2:2.17.0-1 lib32-fontconfig-2:2.17.0-1
Total Installed Size: 1.45 MiB
Net Upgrade Size: 0.01 MiB
:: Proceed with installation? [Y/n] Y
(2/2) checking keys in keyring [#######################################################################################] 100%
(2/2) checking package integrity [#######################################################################################] 100%
(2/2) loading package files [#######################################################################################] 100%
(2/2) checking for file conflicts [#######################################################################################] 100%
(2/2) checking available disk space [#######################################################################################] 100%
:: Processing package changes...
(1/2) upgrading fontconfig [#######################################################################################] 100%
Rebuilding fontconfig cache...
(2/2) upgrading lib32-fontconfig [#######################################################################################] 100%
Rebuilding 32-bit fontconfig cache...
:: Running post-transaction hooks...
(1/5) Arming ConditionNeedsUpdate...
(2/5) Updating fontconfig configuration...
(3/5) Refreshing PackageKit...
(4/5) Updating fontconfig cache...
(5/5) Updating 32-bit fontconfig cache...So its gone now. I'm not sure what I needed the font for, seems to be installed from AUR...
Anyway, thank you, probably I don't need the font.
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#13 Yesterday 14:46:52
- seth
- Member
- Registered: 2012-09-03
- Posts: 65,075
Re: [SOLVED] Buffer overflow detected on update to fontconfig-2:2.17.0-1
Please always remember to mark resolved threads by editing your initial posts subject - so others will know that there's no task left, but maybe a solution to find.
Thanks. (there's already an open upstream bug, so not much more to do here)
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