[Expired for linux (Ubuntu) because there has been no activity for 60 days.]
** Changed in: linux (Ubuntu) Status: Incomplete => Expired -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1948542 Title: Impish: perf probe crashes Status in linux package in Ubuntu: Expired Bug description: Perf crashes when attempting to add probes at certain locations. I submitted a bug via apport, but I have additional details to share (and I couldn't figure out how to find that report). - I was unable to reproduce on the upstream kernel (torvalds/master). - perf probe crashed with the following command: holmanb@arc:~/workspace/Stockfish/src > sudo perf probe -x ./stockfish --add stage_7=next_move:77 zsh: segmentation fault sudo perf probe -x ./stockfish --add stage_7=next_move:77 listing lines that a probe can be attached to (see following) showed that perf probe thinks this line _could_ be added perf probe -L next_move -x ./stockfish .... case BAD_CAPTURE: 77 return select<Next>([](){ return true; }); Using torvalds/master, (and stockfish built with the same compiler/arguments), this issue did not occur, and `perf probe -x ./stockfish -L next_move` did not list that address as one available to attach a probe to. Upstream: root@arc-kvm:~/Stockfish/src# perf probe -x ./stockfish --add next_move=next_move:77 This line is sharing the address with other lines. Please try to probe at next_move:73 instead. Error: Failed to add events. This symptom appeared was reproducible when attempting to add a probe at other lines that attempted to return the output of a template function with a lambda argument". holmanb@arc:~ > lsb_release -rd Description: Ubuntu 21.10 Release: 21.10 holmanb@arc:~ > apt-cache policy linux-tools-common linux-tools-common: Installed: 5.13.0-19.19 Candidate: 5.13.0-19.19 Version table: *** 5.13.0-19.19 500 500 http://us.archive.ubuntu.com/ubuntu impish/main amd64 Packages 500 http://us.archive.ubuntu.com/ubuntu impish/main i386 Packages 100 /var/lib/dpkg/status What I expected to happen: Not a segfault. What happened: segfault To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1948542/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp