CC_STACKPROTECTOR and PaX

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CC_STACKPROTECTOR and PaX

Postby ncuk » Sat Aug 20, 2011 9:20 pm

I was recently going through the Kconfig with pax and grsecurity. One question I have is this: Whis is CC_STACKPROTECTOR disabled if UDEREF is enabled? This may be silly, but would be good to know.
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Re: CC_STACKPROTECTOR and PaX

Postby PaX Team » Sun Aug 21, 2011 6:55 am

ncuk wrote:Whis is CC_STACKPROTECTOR disabled if UDEREF is enabled?
due to a change in UDEREF/i386 the gs register is permanently needed in the kernel (to properly track/enforce the task address limit even across kernel re-entries and to prevent exploitation of bugs like CVE-2010-4258) and that excludes its use for SSP.
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Re: CC_STACKPROTECTOR and PaX

Postby tjh » Tue Sep 27, 2011 4:59 pm

tjh
 
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