linux-kernel - Re: [PATCH v2] seccomp: Make syscall skipping and nr changes more consistent

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:	Fri, 3 Aug 2012 14:36:55 +1000 (EST)
From:	James Morris <jmorris@...ei.org>
To:	Andy Lutomirski <luto@...capital.net>
cc:	James Morris <james.l.morris@...cle.com>,
	linux-kernel@...r.kernel.org, Will Drewry <wad@...omium.org>,
	x86@...nel.org
Subject: Re: [PATCH v2] seccomp: Make syscall skipping and nr changes more
 consistent

On Wed, 1 Aug 2012, Andy Lutomirski wrote:

> This fixes two issues that could cause incompatibility between
> kernel versions:
> 
>  - If a tracer uses SECCOMP_RET_TRACE to select a syscall number
>    higher than the largest known syscall, emulate the unknown
>    vsyscall by returning -ENOSYS.  (This is unlikely to make a
>    noticeable difference on x86-64 due to the way the system call
>    entry works.)
> 
>  - On x86-64 with vsyscall=emulate, skipped vsyscalls were buggy.
> 
> This updates the documentation accordingly.
> 
> Signed-off-by: Andy Lutomirski <luto@...capital.net>
> Acked-by: Will Drewry <wad@...omium.org>

Please rebase this to
git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security.git next

or wait until the next -rc, where I'll sync with Linus.

-- 
James Morris
<jmorris@...ei.org>
--
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/