linux-kernel - Re: [PATCHv8 resend 2/2] selftest/x86: add mremap vdso test

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Date:	Mon, 16 May 2016 19:24:49 +0300
From:	Dmitry Safonov <dsafonov@...tuozzo.com>
To:	Ingo Molnar <mingo@...nel.org>
CC:	<linux-kernel@...r.kernel.org>, <mingo@...hat.com>,
	<luto@...capital.net>, <tglx@...utronix.de>, <hpa@...or.com>,
	<x86@...nel.org>, <akpm@...ux-foundation.org>,
	<linux-mm@...ck.org>, <0x7f454c46@...il.com>,
	Shuah Khan <shuahkh@....samsung.com>,
	<linux-kselftest@...r.kernel.org>
Subject: Re: [PATCHv8 resend 2/2] selftest/x86: add mremap vdso test

On 05/16/2016 04:54 PM, Ingo Molnar wrote:
>
> * Dmitry Safonov <dsafonov@...tuozzo.com> wrote:
>
>> Should print on success:
>> [root@...alhost ~]# ./test_mremap_vdso_32
>> 	AT_SYSINFO_EHDR is 0xf773f000
>> [NOTE]	Moving vDSO: [f773f000, f7740000] -> [a000000, a001000]
>> [OK]
>> Or segfault if landing was bad (before patches):
>> [root@...alhost ~]# ./test_mremap_vdso_32
>> 	AT_SYSINFO_EHDR is 0xf774f000
>> [NOTE]	Moving vDSO: [f774f000, f7750000] -> [a000000, a001000]
>> Segmentation fault (core dumped)
>
> Can the segfault be caught and recovered from, to print a proper failure message?

Will add segfault handler, thanks.