overlap scheduling

Severity

Message

Found by

perf_fuzzer: Jiri Olsa

First Seen

4.9-rc1

Most recently Seen

4.9-rc1

Reproducible

?

Found On

?

Linux-kernel Mailing List Report

1 November 2016 -- [PATCH] perf/x86: Fix overlap counter scheduling bug

Introduced by

Fixed by

Kernel Splat

  1.    # perf stat -e 'uncore_cbox_0/event=0x1f/,uncore_cbox_0/event=0x1f/,uncore_cbox_0/event=0x1f/' -a
    
    
      WARNING: CPU: 0 PID: 0 at arch/x86/events/core.c:718 perf_assign_events+0x2ae/0x2c0
      Call Trace:
       
       dump_stack+0x68/0x93
       __warn+0xcb/0xf0
       warn_slowpath_null+0x1d/0x20
       perf_assign_events+0x2ae/0x2c0
       uncore_assign_events+0x1a7/0x250 [intel_uncore]
       uncore_pmu_event_add+0x7a/0x3c0 [intel_uncore]
       event_sched_in.isra.104+0xf6/0x2e0
       group_sched_in+0x6e/0x190
    

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