From mboxrd@z Thu Jan 1 00:00:00 1970 From: carmelo.amoroso@st.com (Carmelo AMOROSO) Date: Tue, 11 Jan 2011 16:56:02 +0100 Subject: [PATCH 1/2] stackprotector: add stack smashing protector generic implementation In-Reply-To: References: <1293111851-7175-1-git-send-email-filippo.arcidiacono@st.com> <4D245D16.5010702@st.com> Message-ID: <4D2C7D92.1090104@st.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 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 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk0sfZIACgkQoRq/3BrK1s8kfwCeIjayIoaHapweG53icp1yoCN+ ypMAnA08chxTu49eP4QYTQU8UzO4PVpp =ysi4 -----END PGP SIGNATURE-----