On Wed, Jun 01, 2016 at 12:33:05PM -0700, David Carrillo-Cisneros wrote:
> unaccount_pmu_sb_event did not check for attributes in event->attr
> before calling detach_sb_event, while account_pmu_event did.
>
> This caused NULL pointer reference in cgroup events that did not
> have any of the attributes checked by account_pmu_event.
>
> To trigger the bug just wait for a cgroup event to terminate, e.g.:
>
> $ mkdir /dev/cgroup/devices/test
> $ perf stat -e cycles -a -G test sleep 0
>
> ... see crash ...
>
> Patch rebased on peterz/queue/perf/core .
>
> Reviewed-by: Stephane Eranian <eran...@google.com>
> Signed-off-by: David Carrillo-Cisneros <davi...@google.com>
> ---
> kernel/events/core.c | 34 ++++++++++++++++++----------------
> 1 file changed, 18 insertions(+), 16 deletions(-)
Tested-by: Borislav Petkov <b...@suse.de>
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
