Re: [PATCH 1/2] stackprotector: add stack smashing protector

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From: Carmelo AMOROSO <carmelo.amoroso@st.com>
To: linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 1/2] stackprotector: add stack smashing protector
Date: Tue, 11 Jan 2011 15:56:02 +0000	[thread overview]
Message-ID: <4D2C7D92.1090104@st.com> (raw)
In-Reply-To: <AANLkTinZCDRVwwchcB85Wock8nBYK1eJrTWPbgJ-roGh@mail.gmail.com>

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On 1/11/2011 6:30 AM, Mike Frysinger wrote:
> what are you using to test this ? is there a simple strcpy or similar
> code you run as a kernel module that'll allow me to verify ?
> -mike
> 
Hi Mike,
yes, a simple kernel module with a init func that use strcpy or memcpy
to write over the boundaries of an local array variable is enough.
As you know, the array has to be larger than 8 bytes to match with the
gcc heuristic and generate the call to the guard.

Cheers,
Carmelo



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WARNING: multiple messages have this Message-ID (diff)

From: carmelo.amoroso@st.com (Carmelo AMOROSO)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/2] stackprotector: add stack smashing protector generic implementation
Date: Tue, 11 Jan 2011 16:56:02 +0100	[thread overview]
Message-ID: <4D2C7D92.1090104@st.com> (raw)
In-Reply-To: <AANLkTinZCDRVwwchcB85Wock8nBYK1eJrTWPbgJ-roGh@mail.gmail.com>

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On 1/11/2011 6:30 AM, Mike Frysinger wrote:
> what are you using to test this ? is there a simple strcpy or similar
> code you run as a kernel module that'll allow me to verify ?
> -mike
> 
Hi Mike,
yes, a simple kernel module with a init func that use strcpy or memcpy
to write over the boundaries of an local array variable is enough.
As you know, the array has to be larger than 8 bytes to match with the
gcc heuristic and generate the call to the guard.

Cheers,
Carmelo



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Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/

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WARNING: multiple messages have this Message-ID (diff)

From: Carmelo AMOROSO <carmelo.amoroso@st.com>
To: Mike Frysinger <vapier@gentoo.org>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Filippo ARCIDIACONO <filippo.arcidiacono@st.com>,
	"linux-sh@vger.kernel.org" <linux-sh@vger.kernel.org>,
	"linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
	"nicolas.pitre@linaro.org" <nicolas.pitre@linaro.org>,
	"nico@fluxnic.net" <nico@fluxnic.net>
Subject: Re: [PATCH 1/2] stackprotector: add stack smashing protector generic implementation
Date: Tue, 11 Jan 2011 16:56:02 +0100	[thread overview]
Message-ID: <4D2C7D92.1090104@st.com> (raw)
In-Reply-To: <AANLkTinZCDRVwwchcB85Wock8nBYK1eJrTWPbgJ-roGh@mail.gmail.com>

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On 1/11/2011 6:30 AM, Mike Frysinger wrote:
> what are you using to test this ? is there a simple strcpy or similar
> code you run as a kernel module that'll allow me to verify ?
> -mike
> 
Hi Mike,
yes, a simple kernel module with a init func that use strcpy or memcpy
to write over the boundaries of an local array variable is enough.
As you know, the array has to be larger than 8 bytes to match with the
gcc heuristic and generate the call to the guard.

Cheers,
Carmelo



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next prev parent reply	other threads:[~2011-01-11 15:56 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-12-23 13:44 [PATCH 1/2] stackprotector: add stack smashing protector generic Filippo ARCIDIACONO
2010-12-23 13:44 ` [PATCH 1/2] stackprotector: add stack smashing protector generic implementation Filippo ARCIDIACONO
2010-12-23 13:44 ` Filippo ARCIDIACONO
2010-12-23 13:44 ` [PATCH 2/2] sh: stackprotector: change the canary value per task Filippo ARCIDIACONO
2010-12-23 13:44   ` Filippo ARCIDIACONO
2010-12-23 13:44   ` Filippo ARCIDIACONO
2011-01-05 11:59 ` [PATCH 1/2] stackprotector: add stack smashing protector Carmelo AMOROSO
2011-01-05 11:59   ` [PATCH 1/2] stackprotector: add stack smashing protector generic implementation Carmelo AMOROSO
2011-01-05 11:59   ` Carmelo AMOROSO
2011-01-06  9:39   ` [PATCH 1/2] stackprotector: add stack smashing protector Russell King - ARM Linux
2011-01-06  9:39     ` [PATCH 1/2] stackprotector: add stack smashing protector generic implementation Russell King - ARM Linux
2011-01-06  9:39     ` Russell King - ARM Linux
2011-01-06 14:16     ` [PATCH 1/2] stackprotector: add stack smashing protector Carmelo AMOROSO
2011-01-06 14:16       ` [PATCH 1/2] stackprotector: add stack smashing protector generic implementation Carmelo AMOROSO
2011-01-06 14:16       ` Carmelo AMOROSO
2011-01-06 14:19       ` [PATCH 1/2] stackprotector: add stack smashing protector Russell King - ARM Linux
2011-01-06 14:19         ` [PATCH 1/2] stackprotector: add stack smashing protector generic implementation Russell King - ARM Linux
2011-01-06 14:19         ` Russell King - ARM Linux
2011-01-06 14:43         ` [PATCH 1/2] stackprotector: add stack smashing protector Carmelo AMOROSO
2011-01-06 14:43           ` [PATCH 1/2] stackprotector: add stack smashing protector generic implementation Carmelo AMOROSO
2011-01-06 14:43           ` Carmelo AMOROSO
2011-01-11  5:30   ` Mike Frysinger
2011-01-11  5:30     ` Mike Frysinger
2011-01-11  5:30     ` Mike Frysinger
2011-01-11 15:56     ` Carmelo AMOROSO [this message]
2011-01-11 15:56       ` Carmelo AMOROSO
2011-01-11 15:56       ` Carmelo AMOROSO

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