linux-kernel - Re: [PATCH] proc: test with vsyscall in mind

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Message-Id: <20190307110102.914eaf61d17339c6ae9ca3ef@linux-foundation.org>
Date:   Thu, 7 Mar 2019 11:01:02 -0800
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Alexey Dobriyan <adobriyan@...il.com>
Cc:     linux-kernel@...r.kernel.org, rong.a.chen@...el.com
Subject: Re: [PATCH] proc: test with vsyscall in mind

On Thu, 7 Mar 2019 21:32:04 +0300 Alexey Dobriyan <adobriyan@...il.com> wrote:

> Read from vsyscall page to tell if vsyscall is being used.
> 
> Reported-by: kernel test robot
> Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>

There's a lot of information missing from this changelog :(


I rewrote it to this:

: selftests: proc: proc-pid-vm
: ========================================
: proc-pid-vm: proc-pid-vm.c:277: main: Assertion `rv == strlen(buf0)' failed.
: Aborted

Because the vsyscall mapping is enabled.  Read from vsyscall page to tell
if vsyscall is being used.

Link: http://lkml.kernel.org/r/20190307183204.GA11405@avx2
Link: http://lkml.kernel.org/r/20190219094722.GB28258@shao2-debian
Fixes: 34aab6bec23e7e9 ("proc: test /proc/*/maps, smaps, smaps_rollup, statm")
Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
Reported-by: kernel test robot <rong.a.chen@...el.com>
Cc: Shuah Khan <shuah@...nel.org>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>