[tip:x86/mm] Set first MB as RW+NX
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From: Randy Dunlap on 27 May 2010 13:00 Hi, On Thu, 27 May 2010 12:52:21 -0400 Siarhei Liakh wrote: > diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug > index 4814d35..6dbcb6f 100644 > --- a/arch/x86/Kconfig.debug > +++ b/arch/x86/Kconfig.debug > @@ -123,6 +123,17 @@ config DEBUG_NX_TEST > and the software setup of this feature. > If in doubt, say "N" > > +config DEBUG_SET_1ST_MB_RWNX > + bool "Set 1st MB of kernel space mapping as RW+NX" > + default n > + depends on X86 > + ---help--- > + This option helps to catch unintended modifications/execution of > + 1st megabyte of kernel address space. Such protection may interfere > + with run-time code patching and legacy BIOS services residing within > + the 1st MB of physical address space. > + If in doubt, say "N". Please spell out "first" instead of "1st" (all places in user-visible text). and gmail is space-stuffing your patches (converting tabs to spaces). Not good. Are you using the gmail web interface for patches? That won't work AFAIK. You'll need to use a real mail client. --- ~Randy *** Remember to use Documentation/SubmitChecklist when testing your code *** -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Siarhei Liakh on 27 May 2010 13:00
On Thu, May 27, 2010 at 12:55 PM, Randy Dunlap <randy.dunlap(a)oracle.com> wrote: > Hi, > > > On Thu, 27 May 2010 12:52:21 -0400 Siarhei Liakh wrote: > >> diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug >> index 4814d35..6dbcb6f 100644 >> --- a/arch/x86/Kconfig.debug >> +++ b/arch/x86/Kconfig.debug >> @@ -123,6 +123,17 @@ config DEBUG_NX_TEST >> � � � � �and the software setup of this feature. >> � � � � �If in doubt, say "N" >> >> +config DEBUG_SET_1ST_MB_RWNX >> + � � � bool "Set 1st MB of kernel space mapping as RW+NX" >> + � � � default n >> + � � � depends on X86 >> + � � � ---help--- >> + � � � � This option helps to catch unintended modifications/execution of >> + � � � � 1st megabyte of kernel address space. Such protection may interfere >> + � � � � with run-time code patching and legacy BIOS services residing within >> + � � � � the 1st MB of physical address space. >> + � � � � If in doubt, say "N". > > Please spell out "first" instead of "1st" (all places in user-visible text). > > and gmail is space-stuffing your patches (converting tabs to spaces). > Not good. �Are you using the gmail web interface for patches? > That won't work AFAIK. �You'll need to use a real mail client. Will do. Thanks. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |