| Message ID | cover.1527004073.git.joseph.salisbury@canonical.com |
|---|---|
| Headers | show |
| Series | s390/cpum_sf: ensure sample frequency of perf event attributes is non-zero | expand |
Applied to X/A/B On 2018-05-25 07:38:50 , Joseph Salisbury wrote: > BugLink: http://bugs.launchpad.net/bugs/1772593 > > == 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 > event attribute is non-zero. > > == 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. > > Hendrik Brueckner (1): > s390/cpum_sf: ensure sample frequency of perf event attributes is > non-zero > > arch/s390/kernel/perf_cpum_sf.c | 4 ++++ > 1 file changed, 4 insertions(+) > > -- > 2.7.4 > > > -- > kernel-team mailing list > kernel-team@lists.ubuntu.com > https://lists.ubuntu.com/mailman/listinfo/kernel-team
BugLink: http://bugs.launchpad.net/bugs/1772593 == 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 event attribute is non-zero. == 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. Hendrik Brueckner (1): s390/cpum_sf: ensure sample frequency of perf event attributes is non-zero arch/s390/kernel/perf_cpum_sf.c | 4 ++++ 1 file changed, 4 insertions(+)