linux-kernel - Re: [lkp-robot] [x86/asm] 51bad67ffb: int3:#[##]

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Message-ID: <20180515225028.GA21902@avx2>
Date:   Wed, 16 May 2018 01:50:28 +0300
From:   Alexey Dobriyan <adobriyan@...il.com>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Peter Anvin <h.peter.anvin@...el.com>,
        kernel test robot <xiaolong.ye@...el.com>,
        Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Andrew Lutomirski <luto@...nel.org>,
        Borislav Petkov <bp@...en8.de>,
        Brian Gerst <brgerst@...il.com>,
        Denys Vlasenko <dvlasenk@...hat.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Peter Anvin <hpa@...or.com>, tipbuild@...or.com,
        LKP <lkp@...org>
Subject: Re: [lkp-robot] [x86/asm] 51bad67ffb: int3:#[##]

On Tue, May 15, 2018 at 03:27:34PM -0700, Linus Torvalds wrote:
> On Tue, May 15, 2018 at 2:43 PM Alexey Dobriyan <adobriyan@...il.com> wrote:
> 
> > It crashed into the middle of the padding.
> 
> No, the beginning of the padding. "int3" will push the return address on
> the stack, so when it points to the second 'int3' instruction, it's because
> the first one triggered.

Sending i386 patches should not be done that late...

I checked 32-bit asm as well.