Messages in this thread | ![/](/images/icornerl.gif) | | From | Vince Weaver <> | Date | Thu, 8 Nov 2018 11:46:41 -0500 (EST) | Subject | Re: perf: perf_fuzzer triggers NULL pointer dereference |
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On Thu, 8 Nov 2018, Alexander Shishkin wrote:
> Vince Weaver <vincent.weaver@maine.edu> writes: > > > On Thu, 8 Nov 2018, Vince Weaver wrote: > > > >> [91760.326510] BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 > >> [91760.334876] PGD 0 P4D 0 > >> [91760.337596] Oops: 0000 [#1] SMP PTI > >> [91760.341332] CPU: 6 PID: 0 Comm: swapper/6 Tainted: G W 4.20.0-rc1+ #119 > >> [91760.349816] Hardware name: LENOVO 10AM000AUS/SHARKBAY, BIOS FBKT72AUS 01/26/2014 > >> [91760.357723] RIP: 0010:perf_prepare_sample+0x82/0x4a0 > > > > so what's the best way to do the equivelent of addr2line on something like > > this, now that we aren't allowed to know the RIP anymore? > > scripts/decode_stacktrace.sh works most of the time. > > Sounds like BTS needs fixing up again. Thanks for looking at it though!
In case it matters, it looks like the address of the oops comes down to
linux.git/kernel/events/core.c:6393
size += data->callchain->nr;
Vince
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