linux-kernel - Re: Nokia N900: insecure W+X mapping at 0xd0050000

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Message-ID: <20180308162446.GK5799@atomide.com>
Date:   Thu, 8 Mar 2018 08:24:46 -0800
From:   Tony Lindgren <tony@...mide.com>
To:     Pavel Machek <pavel@....cz>
Cc:     pali.rohar@...il.com, sre@...nel.org,
        kernel list <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-omap@...r.kernel.org, khilman@...nel.org,
        aaro.koskinen@....fi, ivo.g.dimitrov.75@...il.com,
        patrikbachan@...il.com, serge@...lyn.com, abcloriens@...il.com,
        clayton@...ftyguy.net, martijn@...xit.nl,
        sakari.ailus@...ux.intel.com,
        Filip Matijević <filip.matijevic.pz@...il.com>
Subject: Re: Nokia N900: insecure W+X mapping at 0xd0050000

* Pavel Machek <pavel@....cz> [180308 06:29]:
> Insecure W+X mappings, who cares about those? I have 7 pages...

Is this with CONFIG_DEBUG_WX=y?

My guess is that it's for mapping the PM assembly to SRAM. This
is already fixed for am335x that is using drivers/misc/sram*.c.
I think omap2 - omap4 still need fixing if this is the culprit.

Regards,

Tony