Messages in this thread | | | Date | Thu, 19 May 2016 10:36:09 +0300 (EEST) | From | Meelis Roos <> | Subject | Re: UBSAN: Undefined behaviour in arch/x86/events/intel/p6.c:115:29 |
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> I think UBSAN has correctly identified a bug. I looked at the code in > v4.6. In file arch/x86/events/core.c, in the function > filter_events(), there is a loop starting at line 1554 that should go > over 10 event counters. But in file arch/x86/events/intel/p6.c, only > 8 event counters have been declared at line 9. > > I have a fix but do not for sure if its reasonable. I think we should > pass on the max_events for the pmu to filter_events() function and > change the loop condition accordingly. Can you apply the patch below > and test again? It compiles, but I have not tested it.
Seems to work - warning is gone, everythins is detected as before.
-- Meelis Roos (mroos@linux.ee)
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