Hallo, I don't fully agree. If you don't see a problem here, WHERE do you see it?
Under my naive assumptions, it looks like SIGTERM is not sent when lightdm stops the service. So apparently a systemd issue. I would like to investigate more but a there seems to be no "debug" or "trace" mode for such kind of issues in systemd. Mind to share your knowledge? * Michael Biebl [Fri, Jan 08 2021, 01:34:43PM]: > Control: reassign -1 xscreensaver > > I don't see a systemd problem here, so re-assigning to xscreensaver. > > Am 08.01.21 um 13:04 schrieb Eduard Bloch: > > Package: systemd > > Version: 247.2-4 > > Severity: serious > > > > Hi, > > > > I am reporting this with high severity because it might affect system > > security. > > > > For details of this issue, see 978589. There are different symptoms to > > see but the originating cause is apparently the same: > > > > - xscreensaver user service is enabled as documented in its README > > - lightdm starts the service in its internal user session (owned by > > "lightdm" user) > > - lightdm stops its session when the login happens. However, > > xscreensaver process is NOT terminated for unknown reason. > > - having this xscreensaver hanging around disturbs the startup of > > another xscreensaver process in the new user session > > - after ~15s the old xscreensaver process (from lightdm) is finally > > dead, apparently a SIGTERM is emited only then! > > > > Visible symptoms: > > > > In the meantime, someone might lock the system (by xscreensaver-command) > > and go away, assuming that xscreensaver is locked. And then it suddenly > > dies. > > > > Same things happens if xscreensaver is invoked from .xsession or similar > > contents instead of user service. > > > > Best regards, > > Eduard. > > > > -- Package-specific info: > > > > -- System Information: > > Debian Release: bullseye/sid > > APT prefers unstable-debug > > APT policy: (500, 'unstable-debug'), (500, 'unstable'), (500, 'stable'), > > (1, 'experimental-debug'), (1, 'experimental') > > Architecture: amd64 (x86_64) > > Foreign Architectures: i386 > > > > Kernel: Linux 5.10.5+ (SMP w/12 CPU threads) > > Kernel taint flags: TAINT_OOT_MODULE > > Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8), LANGUAGE > > not set > > Shell: /bin/sh linked to /bin/bash > > Init: systemd (via /run/systemd/system) > > LSM: AppArmor: enabled > > > > Versions of packages systemd depends on: > > ii adduser 3.118 > > ii libacl1 2.2.53-9 > > ii libapparmor1 2.13.6-3 > > ii libaudit1 1:3.0-2 > > ii libblkid1 2.36.1-4 > > ii libc6 2.31-9 > > ii libcap2 1:2.44-1 > > ii libcrypt1 1:4.4.17-1 > > ii libcryptsetup12 2:2.3.4-1 > > ii libgcrypt20 1.8.7-2 > > ii libgnutls30 3.7.0-5 > > ii libgpg-error0 1.38-2 > > ii libip4tc2 1.8.6-1 > > ii libkmod2 28-1 > > ii liblz4-1 1.9.3-1 > > ii liblzma5 5.2.5-1.0 > > ii libmount1 2.36.1-4 > > ii libpam0g 1.4.0-2 > > ii libseccomp2 2.5.1-1 > > ii libselinux1 3.1-2+b2 > > ii libsystemd0 247.2-4 > > ii libzstd1 1.4.8+dfsg-1 > > ii mount 2.36.1-4 > > ii systemd-timesyncd [time-daemon] 247.2-4 > > ii util-linux 2.36.1-4 > > > > Versions of packages systemd recommends: > > ii dbus 1.12.20-1 > > > > Versions of packages systemd suggests: > > ii policykit-1 0.105-29 > > pn systemd-container <none> > > > > Versions of packages systemd is related to: > > pn dracut <none> > > ih initramfs-tools 0.139 > > ii libnss-systemd 247.2-4 > > ii libpam-systemd 247.2-4 > > ii udev 247.2-4 > > > > -- no debconf information > > > > -- > > Chirurgen sind die einzigen Menschen, die ohne fremden Blinddarm und > > ohne fremde Mandeln nicht leben können. > > -- Peter Sellers > > > > Best regards, Eduard.
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