> The problem is the same for other popular tools like pkill from the same package.
The SRU uploads fix pgrep, but not pkill. Isn't pkill also affected? Rather than fixing that in a separate SRU causing users to have to update twice, should we be fixing both at the same time? Or are you intending to never fix pkill in an SRU? Are there any other commands affected by the same issue? -- 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/1874824 Title: pgrep reports error "cannot allocate" when run without stack limit Status in procps package in Ubuntu: Fix Released Status in procps source package in Focal: In Progress Status in procps source package in Groovy: In Progress Status in procps source package in Hirsute: Fix Released Status in procps package in Debian: New Bug description: [Impact] - Users who have ulimit set high would see either slow or failed pgrep and pkill commands - Users who have ulimit set to unlimited would see failed pgrep and pkill commands - This bug occurs because the behavior of sysconf(_SC_ARG_MAX) changed with a newer version of the kernel. [Test Case] - set the ulimit to unlimited by running `ulimit -S -s unlimited` - run `pgrep bash` to see that the "cannot allocate" error is printed and the command has failed. [Where Problems Could Occur] - We have set upper and lower limits on the size of the malloc, but if further kernel versions break the call to sysconf in unexpected ways we could still see problems. [Original Description] If you have no stack limit (ulimit -S -s unlimited), any pgrep call will fail with an error: > pgrep vim pgrep: cannot allocate 4611686018427387903 bytes If you have a high stack limit (e.g. ulimit -S -s 500000), pgrep is very slow: > time pgrep vim 2196 real 8.48s user 8.40s syst 0.07s busy 99% rmem 253444 The relevant upstream bug report could be: https://gitlab.com/procps-ng/procps/-/issues/152 Archlinux bug report: https://bugs.archlinux.org/task/66093 procps: Installed: 2:3.3.16-1ubuntu2 500 http://archive.ubuntu.com/ubuntu focal/main amd64 Packages To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/procps/+bug/1874824/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
