linux-kernel - Re: [patch] x86: test case for the RODATA config option

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 23 Jan 2008 01:04:59 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [patch] x86: test case for the RODATA config option


cool!

could you perhaps also do an add-on:

> +	/* test 1: read the value */
> +	/* test 2: write to the variable; this should fault */
> +	/* test 3: check the value hasn't changed */

           test 4: make it writable again
           test 5: make it NX -> check that it's not executable

and perhaps also check that normal kernel allocations (kmalloc(), etc.) are NX as well? (with the same section trick you use in 
this patch - perhaps try to call a kmalloc()-ed buffer that contains a 
'ret' instruction - if that call faults then the test is OK, if the call 
succeeds then the test failed.)

	Ingo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/