> # addr2line -i -e ivb-ep-build/vmlinux ffffffff81025f18
>
> arch/x86/include/asm/bitops.h:318
> arch/x86/kernel/cpu/perf_event_intel_uncore.c:3339
i == zero (ok)
c points to some kernel looking address
hwc->idx is 64
/* fastpath, try to reuse previous register */
for (i = 0; i < n; i++) {
hwc = &box->event_list[i]->hw;
c = hwc->constraint;
/* never assigned */
if (hwc->idx == -1)
break;
/* constraint still honored */
if (!test_bit(hwc->idx, c->idxmsk))
break;
My best bet is something goes wrong in uncore_pmu_to_box or
uncore_event_to_pmu in hte caller, so the box is bogus.
Did the test do CPU hot plug?
BTW i don't think it's a security issue because the uncore driver
is only accesible for root.
-Andi
--
a...@linux.intel.com -- Speaking for myself only.
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