Package: gdm3 Version: 3.14.1-3 Severity: important Tags: upstream Dear Maintainer,
On a system upgraded to systemd, GDM logs the stderr of the user's X session in three (3!) log files through journald: /var/log/user.log /var/log/messages /var/log/syslog This fills up /var/log/ with huge journal files, because of the output of a *user* application. This is due to GDM3 logging to systemd instead of .xsession-errors (or $XDG_CACHE_COME/gdm/session.log more recently). See https://bugzilla.gnome.org/show_bug.cgi?id=676181 This behavior is extremely annoying as it continuously pollutes system logs with most generally useless user application debugging or unimpotant warnings (such as GTK warning messages from various applications). This can furthermore be a *serious* issue because it can easily lead to DoS-like behavior when a user application misbehaves and spams its stdout and/or stderr. As mentioned above, the X session output ends up in three system logs written by syslog (a root service), which doesn't seem to be handling this kind of stress well by default, and leads to filling /var/log beyond limits (using reserved blocks). I know this kind of behavior can already be triggered with direct syslog interaction (e.g. through `logger`), but it is quite different since application would need to explicitly use syslog, while here it affects random applications whom output was never expected to even be logged. So, please rebuild GDM3 with `--disable-systemd-journal`, as suggested in a comment in the aforementioned bug: https://bugzilla.gnome.org/show_bug.cgi?id=676181#c17 This should give back a sane logging behavior by logging to X session output to $XDG_CACHE_HOME/gdm/session.log. Regards, Colomban -- System Information: Debian Release: 8.0 APT prefers unstable APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable') Architecture: amd64 (x86_64) Kernel: Linux 3.16.0-4-amd64 (SMP w/4 CPU cores) Locale: LANG=fr_FR.utf8, LC_CTYPE=fr_FR.utf8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages gdm3 depends on: ii accountsservice 0.6.37-3+b1 ii adduser 3.113+nmu3 ii cinnamon [x-window-manager] 2.2.16-5 ii dconf-cli 0.22.0-1 ii dconf-gsettings-backend 0.22.0-1 ii debconf [debconf-2.0] 1.5.55 ii gir1.2-gdm3 3.14.1-3 ii gnome-session [x-session-manager] 3.14.0-2 ii gnome-session-bin 3.14.0-2 ii gnome-session-flashback [x-session-manager] 3.8.1-7 ii gnome-settings-daemon 3.14.2-2 ii gnome-shell 3.14.2-3 ii gnome-terminal [x-terminal-emulator] 3.14.1-1 ii gsettings-desktop-schemas 3.14.1-1 ii libaccountsservice0 0.6.37-3+b1 ii libaudit1 1:2.4-1+b1 ii libc6 2.19-13 ii libcanberra-gtk3-0 0.30-2.1 ii libcanberra0 0.30-2.1 ii libgdk-pixbuf2.0-0 2.31.1-2+b1 ii libgdm1 3.14.1-3 ii libglib2.0-0 2.42.1-1 ii libglib2.0-bin 2.42.1-1 ii libgtk-3-0 3.14.5-1 ii libpam-modules 1.1.8-3.1 ii libpam-runtime 1.1.8-3.1 ii libpam-systemd 215-8 ii libpam0g 1.1.8-3.1 ii librsvg2-common 2.40.5-1 ii libselinux1 2.3-2 ii libsystemd0 215-8 ii libwrap0 7.6.q-25 ii libx11-6 2:1.6.2-3 ii libxau6 1:1.0.8-1 ii libxdmcp6 1:1.1.1-1+b1 ii libxrandr2 2:1.4.2-1+b1 ii lsb-base 4.1+Debian13+nmu1 ii marco [x-window-manager] 1.8.2+dfsg1-4 ii mate-session-manager [x-session-manager] 1.8.1-5 ii mate-terminal [x-terminal-emulator] 1.8.1+dfsg1-3 ii metacity [x-window-manager] 1:3.14.3-1 ii mutter [x-window-manager] 3.14.2-1 ii openbox [x-window-manager] 3.5.2-8 ii policykit-1 0.105-8 ii twm [x-window-manager] 1:1.0.8-1 ii ucf 3.0030 ii x11-common 1:7.7+7 ii x11-xserver-utils 7.7+3+b1 ii xfce4-session [x-session-manager] 4.10.1-9 ii xfce4-terminal [x-terminal-emulator] 0.6.3-1+b1 ii xfwm4 [x-window-manager] 4.10.1-3 ii xterm [x-terminal-emulator] 312-1 Versions of packages gdm3 recommends: ii at-spi2-core 2.14.0-1 ii desktop-base 8.0.2 ii gnome-icon-theme 3.12.0-1 ii gnome-icon-theme-symbolic 3.12.0-1 ii x11-xkb-utils 7.7+1 ii xserver-xephyr 2:1.16.2.901-1 ii xserver-xorg 1:7.7+7 ii zenity 3.14.0-1 Versions of packages gdm3 suggests: ii gnome-orca 3.14.0-2 ii libpam-gnome-keyring 3.14.0-1+b1 -- debconf-show failed -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
