linux-kernel - Re: [PATCH v4] x86, selftests: Add sigreturn selftest

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Date:	Tue, 07 Apr 2015 13:39:42 +1000
From:	Michael Ellerman <mpe@...erman.id.au>
To:	Andy Lutomirski <luto@...nel.org>
Cc:	Ingo Molnar <mingo@...nel.org>, x86@...nel.org,
	Shuah Khan <shuah.kh@...sung.com>,
	Borislav Petkov <bp@...en8.de>,
	Denys Vlasenko <vda.linux@...glemail.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4] x86, selftests: Add sigreturn selftest

On Mon, 2015-04-06 at 19:01 -0700, Andy Lutomirski wrote:
> This is my sigreturn test, added mostly unchanged from its old home.
> It exercises the sigreturn(2) syscall, specifically focusing on its
> interactions with various IRET corner cases.  It tests for correct
> behavior in several areas that were historically dangerously buggy.
> For example, it exercises espfix on kernels of both bitnesses under
> various conditions, and it contains exploits for several now-fixed
> bugs in IRET error handling.
> 
> If you run it on older kernels, your system will crash.  It probably
> won't eat your data in the process.
> 
> There is no released kernel on which the sigreturn_64 test will
> pass, but it passes on tip:x86/asm.
> 
> IMO it's unfortunate that I need to provide a special script to run
> tests.  I'd rather just list my targets.

If you use lib.mk you can.

  https://git.kernel.org/cgit/linux/kernel/git/shuah/linux-kselftest.git/log/?h=next

See for example:

  https://git.kernel.org/cgit/linux/kernel/git/shuah/linux-kselftest.git/commit/?h=next&id=5744de542dd4b963c2975e6f70844ce2899864e4

cheers


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