linux-kernel - Re: [LKP] [uaccess] 780464aed0: WARNING:at_arch/x86/include/asm/uaccess.h:#strnlen_user/0x

Open Source and information security mailing list archives

Date:   Mon, 4 Mar 2019 11:20:19 +0800
From:   Rong Chen <rong.a.chen@...el.com>
To:     Linus Torvalds <torvalds@...ux-foundation.org>,
        kernel test robot <lkp@...el.com>
Cc:     Kees Cook <keescook@...omium.org>, Jann Horn <jannh@...gle.com>,
        Peter Zijlstra <peterz@...radead.org>, lkp@...org,
        Linux List Kernel Mailing <linux-kernel@...r.kernel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Andy Lutomirski <luto@...capital.net>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>,
        Nadav Amit <namit@...are.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Andy Lutomirski <luto@...nel.org>,
        Joel Fernandes <joel@...lfernandes.org>, yhs@...com,
        Andrew Morton <akpm@...ux-foundation.org>,
        Shuah Khan <shuah@...nel.org>, Ingo Molnar <mingo@...nel.org>,
        Changbin Du <changbin.du@...il.com>
Subject: Re: [LKP] [uaccess] 780464aed0:
 WARNING:at_arch/x86/include/asm/uaccess.h:#strnlen_user/0x

On 3/4/19 3:53 AM, Linus Torvalds wrote:
> On Sun, Mar 3, 2019 at 9:40 AM kernel test robot <lkp@...el.com> wrote:
>> commit: 780464aed08ad00aa6d5f81ac8bef2e714dc8b06 ("[PATCH v5 2/6] uaccess: Use user_access_ok() in user_access_begin()")
> Hmm. Not an upstream commit ID, so this is presumably a backport.
>
> Ok, let's see what it is using the web link:
>
>> url: https://github.com/0day-ci/linux/commits/Masami-Hiramatsu/tracing-probes-uaccess-Add-support-user-space-access/20190303-203749
> Yeah, that just gives a github 404 error.

Sorry for the broken link,  It's ok now.

Best Regards,
Rong Chen

>
> I'm _assuming_ it's the WARN_ON_IN_IRQ() in the access_ok().
>
> Which doesn't much make sense either (why wouldn't it happen in
> mainline)? But without a useful web link to see what is actually being
> tested, I guess it's not something I can even look at...
>
>                        Linus
> _______________________________________________
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> LKP@...ts.01.org
> https://lists.01.org/mailman/listinfo/lkp

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