SRU request submitted: https://lists.ubuntu.com/archives/kernel-team/2018-May/092737.html
** No longer affects: linux (Ubuntu Cosmic) ** Description changed: - Description: cpum_sf: ensure sample freq is non-zero - Symptom: A kernel crash might occur. - Problem: An FP divide exception during the sample rate + == SRU Justification == + A regression was introduced by commit 8c069ff4bd606 in v3.14-rc1. IBM + is requested commit 4bbaf2584b86 in all Ubuntu kernels to resolve this + isue. + + Bug Description: cpum_sf: ensure sample freq is non-zero + Symptom: A kernel crash might occur. + Problem: An FP divide exception during the sample rate initialization for the hardware sampling facility. - Solution: Ensure that the sample frequency of the perf + Solution: Ensure that the sample frequency of the perf event attribute is non-zero. - Reproduction: Run trinity against the perf_event_open() syscall. - Upstream-ID: 4bbaf2584b86b0772413edeac22ff448f36351b1 - Component: kernel + + == Fix == + 4bbaf2584b86 ("s390/cpum_sf: ensure sample frequency of perf event attributes is non-zero") + + == Regression Potential == + Low. Fix is specific to s390. + + == Test Case == + A test kernel was built with this patch and tested by the original bug reporter. + The bug reporter states the test kernel resolved the bug. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1772593 Title: cpum_sf: ensure sample freq is non-zero To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1772593/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs