From: Siarhei Liakh <sliakh.lkml@gmail•com>
To: Dave Jones <davej@redhat•com>,
Siarhei Liakh <sliakh.lkml@gmail•com>,
linux-kernel@vger•kernel.org,
linux-security-module@vger•kernel.org,
linux-next@vger•kernel.org, Arjan
Subject: Re: [PATCH v6] RO/NX protection for loadable kernel modules
Date: Tue, 22 Sep 2009 11:49:55 -0400 [thread overview]
Message-ID: <817ecb6f0909220849t2142f6bdhdeb0180dedc646d2@mail.gmail.com> (raw)
In-Reply-To: <20090921214046.GA17243@redhat.com>
> Hi Siarhei,
> I tried out this patch on 2.6.31, and got the following trace during bootup..
>
> ------------[ cut here ]------------
> WARNING: at kernel/trace/ftrace.c:1003 ftrace_bug+0x198/0x27e() (Not tainted)
> Hardware name: VGN-Z540N
...
> ---[ end trace 95b33ebf87286ae6 ]---
> ftrace faulted on writing [<ffffffffa0000193>] video_output_register+0x11/0x10a [output]
>
>
> I guess ftrace is trying to NOP out something in the modules which
> are marked read-only ?
Entirely possible. I will review ftrace and make sure the patch
accounts for this.
Thank you.
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next prev parent reply other threads:[~2009-09-22 15:49 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-11 2:50 [PATCH v6] RO/NX protection for loadable kernel modules Siarhei Liakh
2009-09-21 21:40 ` Dave Jones
2009-09-22 15:49 ` Siarhei Liakh [this message]
2009-10-05 11:57 ` Siarhei Liakh
2009-09-21 23:59 ` Rusty Russell
2009-09-22 15:50 ` Siarhei Liakh
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