Public bug reported: [Impact]
* Builds and autpkgtests frequently fail due to failing tst-getrandom probably due to insufficient source of entropy on Launchpad. This causes extra work by requiring retriggering failing builds and autopkgtests. [Test Case] * Observe tst-getrandom tests being marked XFAIL in build logs. [Regression Potential] * The fix does not change run-time behaviour of glibc, just ignores a test. This lets potential breakages in getrandom()'s implementation or in kernel's random source being undetected, but the test results can still be observed in the logs if needed and the random implementation is also most likely exercised in other tests, too. [Other Info] The issue can be reproduced locally in a built glibc package tree without haveged or any other good entropy source installed: rbalint@gaia:~/projects/deb/build-area/glibc-2.31$ for i in $(seq 1000); do ./build-tree/amd64-libc/stdlib/tst-getrandom; done Timed out: killed the child process Termination time: 2020-08-12T21:05:28.234517252 Last write to standard output: 2020-08-12T21:05:04.069616637 Timed out: killed the child process Termination time: 2020-08-12T21:05:48.337084141 Last write to standard output: 2020-08-12T21:05:28.069616637 Timed out: killed the child process Termination time: 2020-08-12T21:06:08.439695563 Last write to standard output: 2020-08-12T21:05:48.069616637 Timed out: killed the child process Termination time: 2020-08-12T21:06:28.542962616 Last write to standard output: 2020-08-12T21:06:08.069616637 Timed out: killed the child process ... With haveged installed the tests pass quickly and without error: rbalint@gaia:~/projects/deb/build-area/glibc-2.31$ for i in $(seq 1000); do ./build-tree/amd64-libc/stdlib/tst-getrandom; done rbalint@gaia:~/projects/deb/build-area/glibc-2.31$ An other way of fixing the issue would be installing better entropy sources in the build and autopkgtest infrastructure. ** Affects: auto-package-testing Importance: Undecided Status: New ** Affects: glibc (Ubuntu) Importance: Undecided Status: New ** Also affects: auto-package-testing Importance: Undecided Status: New ** Description changed: [Impact] - * Builds and autpkgtests frequently fail due to failing tst-getrandom + * Builds and autpkgtests frequently fail due to failing tst-getrandom probably due to insufficient source of entropy on Launchpad. This causes extra work by requiring retriggering failing builds and autopkgtests. [Test Case] * Observe tst-getrandom tests being marked XFAIL in build logs. [Regression Potential] * The fix does not change run-time behaviour of glibc, just ignores a test. This lets potential breakages in getrandom()'s implementation or in kernel's random source being undetected, but the test results can still be observed in the logs if needed and the random implementation is also most likely exercised in other tests, too. [Other Info] The issue can be reproduced locally in a built glibc package tree without haveged or any other good entropy source installed: rbalint@gaia:~/projects/deb/build-area/glibc-2.31$ for i in $(seq 1000); do ./build-tree/amd64-libc/stdlib/tst-getrandom; done Timed out: killed the child process Termination time: 2020-08-12T21:05:28.234517252 Last write to standard output: 2020-08-12T21:05:04.069616637 Timed out: killed the child process Termination time: 2020-08-12T21:05:48.337084141 Last write to standard output: 2020-08-12T21:05:28.069616637 Timed out: killed the child process Termination time: 2020-08-12T21:06:08.439695563 Last write to standard output: 2020-08-12T21:05:48.069616637 Timed out: killed the child process Termination time: 2020-08-12T21:06:28.542962616 Last write to standard output: 2020-08-12T21:06:08.069616637 Timed out: killed the child process ... With haveged installed the tests pass quickly and without error: rbalint@gaia:~/projects/deb/build-area/glibc-2.31$ for i in $(seq 1000); do ./build-tree/amd64-libc/stdlib/tst-getrandom; done rbalint@gaia:~/projects/deb/build-area/glibc-2.31$ + + An other way of fixing the issue would be installing better entropy + sources in the build and autopkgtest infrastructure. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1891403 Title: glibc tests needs more entropy causing tst-getrandom failures To manage notifications about this bug go to: https://bugs.launchpad.net/auto-package-testing/+bug/1891403/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs