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

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Message-ID: <CA+55aFy6_fJkmuWDZC=d_WE+_oYHtXXCbb=R31jyC1qDKZ8HJw@mail.gmail.com>
Date:   Tue, 15 May 2018 15:27:34 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Alexey Dobriyan <adobriyan@...il.com>
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 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.

                Linus