All of lore.kernel.org
 help / color / mirror / Atom feed
From: Josh Poimboeuf <jpoimboe@redhat.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Vince Weaver <vincent.weaver@maine.edu>,
	Ingo Molnar <mingo@kernel.org>,
	linux-kernel@vger.kernel.org,
	Arnaldo Carvalho de Melo <acme@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Andy Lutomirski <luto@kernel.org>
Subject: Re: perf: fuzzer causes stack going in wrong direction warnings
Date: Thu, 10 May 2018 18:16:49 -0500	[thread overview]
Message-ID: <20180510231649.a5p3cv3g653jai6a@treble> (raw)
In-Reply-To: <20180510134841.GE12217@hirez.programming.kicks-ass.net>

On Thu, May 10, 2018 at 03:48:41PM +0200, Peter Zijlstra wrote:
> On Sun, May 06, 2018 at 06:49:35PM -0500, Josh Poimboeuf wrote:
> 
> > Deja vu.  Most of these are related to perf PEBS, similar to the
> > following issue:
> > 
> >   b8000586c90b ("perf/x86/intel: Cure bogus unwind from PEBS entries")
> > 
> > This is basically the ORC version of that.  setup_pebs_sample_data() is
> > assembling a franken-pt_regs which ORC isn't happy about.  RIP is
> > inconsistent with some of the other registers (like RSP and RBP).
> > 
> > Peter, any ideas?
> 
> Urgh..
> 
> Something like so perhaps? It's a bit of a hack, but I couldn't quickly
> think of something nicer.

I had to convert perf_callchain() to a global function to get it to
compile, but it does seem to fix the issue.

-- 
Josh

  parent reply	other threads:[~2018-05-10 23:16 UTC|newest]

Thread overview: 58+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-01-08 16:12 perf: perf_fuzzer quickly locks up on 4.15-rc7 Vince Weaver
2018-01-08 17:30 ` Ingo Molnar
2018-01-08 20:29   ` Vince Weaver
2018-01-09 10:25     ` Peter Zijlstra
2018-01-09 13:26       ` Peter Zijlstra
2018-01-09 13:36         ` Peter Zijlstra
2018-01-09 13:44         ` Vince Weaver
2018-01-09 15:12           ` Peter Zijlstra
2018-01-09 15:24             ` Vince Weaver
2018-01-09 15:33               ` Peter Zijlstra
2018-01-09 15:56                 ` Vince Weaver
2018-01-09 16:05                   ` Peter Zijlstra
2018-01-09 17:07                     ` Josh Poimboeuf
2018-01-11  5:25                       ` Josh Poimboeuf
2018-01-11 19:00                         ` Vince Weaver
2018-01-11 19:21                           ` Josh Poimboeuf
2018-01-11 19:50                             ` Peter Zijlstra
2018-01-11 19:57                               ` Vince Weaver
2018-01-11 20:43                                 ` Vince Weaver
2018-05-01 13:29                             ` perf: fuzzer causes stack going in wrong direction warnings Vince Weaver
2018-05-01 13:58                               ` Josh Poimboeuf
2018-05-01 19:59                                 ` Vince Weaver
2018-05-01 22:04                                   ` Josh Poimboeuf
2018-05-02 20:50                                     ` Josh Poimboeuf
2018-05-04 14:35                                       ` Vince Weaver
2018-05-04 16:25                                         ` Josh Poimboeuf
2018-05-04 17:00                                           ` Vince Weaver
2018-05-05 15:38                                           ` Vince Weaver
2018-05-05 18:29                                             ` Josh Poimboeuf
2018-05-06 23:49                                               ` Josh Poimboeuf
2018-05-10 13:48                                                 ` Peter Zijlstra
2018-05-10 14:27                                                   ` Josh Poimboeuf
2018-05-10 23:16                                                   ` Josh Poimboeuf [this message]
2018-01-09 16:16                 ` perf: perf_fuzzer quickly locks up on 4.15-rc7 Ingo Molnar
2018-01-09 16:20                   ` Peter Zijlstra
2018-01-09 17:18                 ` Vince Weaver
2018-01-10 15:28                   ` Vince Weaver
2018-01-09 16:14             ` Peter Zijlstra
2018-01-09 17:53               ` Steven Rostedt
2018-01-09 18:02                 ` Peter Zijlstra
2018-01-09 18:09                   ` Steven Rostedt
2018-01-09 19:53                     ` Peter Zijlstra
2018-01-11  9:13           ` Peter Zijlstra
2018-01-11 15:26             ` Vince Weaver
2018-01-11 15:38               ` Peter Zijlstra
2018-01-11 16:41                 ` Vince Weaver
2018-01-11 16:58                   ` Vince Weaver
2018-01-11 17:03                     ` Peter Zijlstra
2018-01-11 18:04                       ` Vince Weaver
2018-01-11 18:20                         ` Vince Weaver
2018-01-11 19:01                           ` Peter Zijlstra
2018-01-11 19:11                       ` Peter Zijlstra
2018-01-11 20:15                         ` Vince Weaver
2018-01-11 20:40                           ` Vince Weaver
2018-01-11 20:57                             ` Peter Zijlstra
2018-01-12 19:48                               ` Vince Weaver
2018-01-11 20:42                           ` Peter Zijlstra
2018-01-11 15:29             ` Peter Zijlstra

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20180510231649.a5p3cv3g653jai6a@treble \
    --to=jpoimboe@redhat.com \
    --cc=acme@kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=luto@kernel.org \
    --cc=mingo@kernel.org \
    --cc=peterz@infradead.org \
    --cc=tglx@linutronix.de \
    --cc=vincent.weaver@maine.edu \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.