Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752453AbdI3UBe (ORCPT ); Sat, 30 Sep 2017 16:01:34 -0400 Received: from mail.sigma-star.at ([95.130.255.111]:45996 "EHLO mail.sigma-star.at" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751141AbdI3UBa (ORCPT ); Sat, 30 Sep 2017 16:01:30 -0400 From: Richard Weinberger To: Josh Poimboeuf Cc: Alexei Starovoitov , ast@kernel.org, daniel@iogearbox.net, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, mingo@kernel.org Subject: Re: WARNING: kernel stack frame pointer at ffff880156a5fea0 in bash:2103 has bad value 00007ffec7d87e50 Date: Sat, 30 Sep 2017 22:01:56 +0200 Message-ID: <3328361.HTSf9WV6P2@blindfold> In-Reply-To: <20170927141430.i6awpjkyoqffof4b@treble> References: <2656822.vqnppgTvlm@blindfold> <41856500.WAzQIuoSLi@blindfold> <20170927141430.i6awpjkyoqffof4b@treble> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1918 Lines: 66 Josh, Am Mittwoch, 27. September 2017, 16:14:30 CEST schrieb Josh Poimboeuf: > On Wed, Sep 27, 2017 at 08:51:22AM +0200, Richard Weinberger wrote: > > Am Mittwoch, 27. September 2017, 00:42:46 CEST schrieb Josh Poimboeuf: > > > > Here is another variant of the warning, it matches the attached .config: > > > I can take a look at it. Unfortunately, for these types of issues I > > > often need the vmlinux file to be able to make sense of the unwinder > > > dump. So if you happen to have somewhere to copy the vmlinux to, that > > > would be helpful. Or if you give me your GCC version I can try to > > > rebuild it locally. > > > > There you go: > > http://git.infradead.org/~rw/bpf_splat/vmlinux.xz > > Thanks. Can you test this fix? > > > diff --git a/arch/x86/kernel/kprobes/common.h > b/arch/x86/kernel/kprobes/common.h index db2182d63ed0..3fc0f9a794cb 100644 > --- a/arch/x86/kernel/kprobes/common.h > +++ b/arch/x86/kernel/kprobes/common.h > @@ -3,6 +3,15 @@ > > /* Kprobes and Optprobes common header */ > > +#include > + > +#ifdef CONFIG_FRAME_POINTER > +# define SAVE_RBP_STRING " push %" _ASM_BP "\n" \ > + " mov %" _ASM_SP ", %" _ASM_BP "\n" > +#else > +# define SAVE_RBP_STRING " push %" _ASM_BP "\n" > +#endif > + > #ifdef CONFIG_X86_64 > #define SAVE_REGS_STRING \ > /* Skip cs, ip, orig_ax. */ \ > @@ -17,7 +26,7 @@ > " pushq %r10\n" \ > " pushq %r11\n" \ > " pushq %rbx\n" \ > - " pushq %rbp\n" \ > + SAVE_RBP_STRING \ > " pushq %r12\n" \ > " pushq %r13\n" \ > " pushq %r14\n" \ > @@ -48,7 +57,7 @@ > " pushl %es\n" \ > " pushl %ds\n" \ > " pushl %eax\n" \ > - " pushl %ebp\n" \ > + SAVE_RBP_STRING \ > " pushl %edi\n" \ > " pushl %esi\n" \ > " pushl %edx\n" \ This fixes the issue for me! Thanks, //richard -- sigma star gmbh - Eduard-Bodem-Gasse 6 - 6020 Innsbruck - Austria ATU66964118 - FN 374287y