From: Vince Weaver <vincent.weaver@maine.edu>
To: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
torvalds@linux-foundation.org
Subject: Re: perf: perf_fuzzer triggers NULL pointer dereference
Date: Thu, 8 Nov 2018 11:05:07 -0500 (EST) [thread overview]
Message-ID: <alpine.DEB.2.21.1811081100490.7406@macbook-air> (raw)
In-Reply-To: <alpine.DEB.2.21.1811081041070.7406@macbook-air>
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?
I probably knew at one point but I've spent the last 3 months doing 6502
assembly language Demoscene coding and so apparently I've forgotten
everything I once knew about x86_64 kernel interfaces. (As can be
imagined, Demoscene coding work is a lot more mentally rewarding than
perf_fuzzer work).
Vince
next prev parent reply other threads:[~2018-11-08 16:05 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-08 15:46 Vince Weaver
2018-11-08 16:05 ` Vince Weaver [this message]
2018-11-08 16:14 ` Alexander Shishkin
2018-11-08 16:46 ` Vince Weaver
2018-11-09 16:38 ` Jiri Olsa
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