** Bug watch added: Debian Bug tracker #1111830 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1111830
** Also affects: procps-ng via https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1111830 Importance: Unknown Status: Unknown ** No longer affects: procps-ng ** Also affects: procps (Debian) via https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1111830 Importance: Unknown Status: Unknown -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to procps in Ubuntu. https://bugs.launchpad.net/bugs/2120904 Title: top/ps crashes on high process creation/deletion pressure Status in procps package in Ubuntu: Triaged Status in procps source package in Noble: New Status in procps source package in Plucky: New Status in procps source package in Questing: Triaged Status in procps package in Debian: Unknown Bug description: I encountered with crashes on top. Reproduced Version: 2:4.0.4-4ubuntu3.2 (noble; Ubuntu 24.04 LTS) Affected Versions: All currently supported versions (I guess) It requires: * A libproc2-0 depending program like `top` (as I encountered) and `ps` (as reported upstream). * Printing certain columns like RUSER is enabled. * On ps, probably non-UTF-8 locale is required (because UTF-8 string processing path workarounds crashes). Still, (as I explain later) this is a race condition issue and for reproduction without patching the program, some randomness is involved (the upstream GitLab issue page provides patching method for reliable crash reproduction). 1. The system should be under high process creation/deletion pressure (where many processed are created and destroyed in a short period of time). 2. On top, reproducibility raises if higher number of processes are printed (i.e. the terminal is large and/or zoomed out) and the delay value (default: 3 seconds) is lower. 3. On ps, set LC_ALL=C to avoid UTF-8-based locales. On upstream, it is found to be a race condition issue on libproc2-0 (cause is discovered by me) and fixed by Jim Warner (the main commit is https://gitlab.com/procps- ng/procps/-/commit/a5708118a4f3184cb5a3e2faa219807e73f007d3). As suggested by Mike Gulick, there may be a possibility synchronizing with Debian (for backporting the fix). cf. https://gitlab.com/procps-ng/procps/-/issues/380 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/procps/+bug/2120904/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
