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Subject: Re: [LKP] [uaccess] 780464aed0:
 WARNING:at_arch/x86/include/asm/uaccess.h:#strnlen_user/0x
To:     Linus Torvalds <torvalds@linux-foundation.org>,
        kernel test robot <lkp@intel.com>
Cc:     Kees Cook <keescook@chromium.org>, Jann Horn <jannh@google.com>,
        Peter Zijlstra <peterz@infradead.org>, lkp@01.org,
        Linux List Kernel Mailing <linux-kernel@vger.kernel.org>,
        Steven Rostedt <rostedt@goodmis.org>,
        Andy Lutomirski <luto@amacapital.net>,
        Alexei Starovoitov <alexei.starovoitov@gmail.com>,
        Nadav Amit <namit@vmware.com>,
        Masami Hiramatsu <mhiramat@kernel.org>,
        Andy Lutomirski <luto@kernel.org>,
        Joel Fernandes <joel@joelfernandes.org>, yhs@fb.com,
        Andrew Morton <akpm@linux-foundation.org>,
        Shuah Khan <shuah@kernel.org>, Ingo Molnar <mingo@kernel.org>,
        Changbin Du <changbin.du@gmail.com>
References: <155136980507.2968.15165201054223875356.stgit@devbox>
 <20190303173954.kliegojbuigqi5tn@inn2.lkp.intel.com>
 <CAHk-=wij8VLupHh1U-fFhFBjin9Fch3mG2_2=aL9h1L+WBvm2g@mail.gmail.com>
From:   Rong Chen <rong.a.chen@intel.com>
Message-ID: <d0cfee27-b2e8-e1ce-1fb9-5ada0c632777@intel.com>
Date:   Mon, 4 Mar 2019 11:20:19 +0800
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On 3/4/19 3:53 AM, Linus Torvalds wrote:
> On Sun, Mar 3, 2019 at 9:40 AM kernel test robot <lkp@intel.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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