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Date:   Fri, 9 Sep 2022 08:20:51 +0300
From:   Alexey Dobriyan <adobriyan@gmail.com>
To:     Jie2x Zhou <jie2x.zhou@intel.com>
Cc:     shuah@kernel.org, guozhengkui@vivo.com, akpm@linux-foundation.org,
        linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
        linux-kselftest@vger.kernel.org, Philip Li <philip.li@intel.com>
Subject: Re: make run_tests -C proc: proc-pid-vm assertion failed.
Message-ID: <YxrNM3q2W8BARvj5@localhost.localdomain>
References: <20220909021916.43293-1-jie2x.zhou@intel.com>
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On Fri, Sep 09, 2022 at 10:19:16AM +0800, Jie2x Zhou wrote:
> hi,
> 
> The test error is caused by g_vsyscall set failed.


> Error output:
>  selftests: proc: proc-pid-vm
>  proc-pid-vm: proc-pid-vm.c:389: main: Assertion `rv == len' failed.
>  Aborted
> 
> g_vsyscall is set to 0.
> In proc-pid-vm.c:
> /*
>  * 0: vsyscall VMA doesn't exist        vsyscall=none
>  * 1: vsyscall VMA is r-xp              vsyscall=emulate
>  * 2: vsyscall VMA is --xp              vsyscall=xonly
>  */
> static int g_vsyscall;
> static const char *str_vsyscall;
> 
> static const char str_vsyscall_0[] = "";
> static const char str_vsyscall_1[] =
> "ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0                  [vsyscall]\n";
> static const char str_vsyscall_2[] =
> "ffffffffff600000-ffffffffff601000 --xp 00000000 00:00 0                  [vsyscall]\n";
> 
> The /proc/%u/maps output is:
> buf=100000000-100001000 r-xp 00000000 00:2d 2                                /tmp/#2 (deleted)
> ffffffffff600000-ffffffffff601000 --xp 00000000 00:00 0                  [vsyscall]
> 
> So the g_vsyscall should be 2 according to commentary(2: vsyscall VMA is --xp).
> Is it a bug?

Can't reproduce. Please, post "strace -f ./proc-pid-vm".