x86: Disable KPROBES with DEBUG_RODATA for now

Right now Kprobes cannot write to the write protected kernel text when
DEBUG_RODATA is enabled. Disallow this in Kconfig for now.

Temporary fix for 2.6.22. In .23 add code to temporarily
unprotect it.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/arch/i386/Kconfig.debug b/arch/i386/Kconfig.debug
index b31c080..6293920 100644 (file)
--- a/arch/i386/Kconfig.debug
+++ b/arch/i386/Kconfig.debug
@@ -49,6 +49,7 @@ config DEBUG_PAGEALLOC
 config DEBUG_RODATA
        bool "Write protect kernel read-only data structures"
        depends on DEBUG_KERNEL
+       depends on !KPROBES # temporary for 2.6.22
        help
          Mark the kernel read-only data as write-protected in the pagetables,
          in order to catch accidental (and incorrect) writes to such const

diff --git a/arch/x86_64/Kconfig.debug b/arch/x86_64/Kconfig.debug
index 775d211..8a86775 100644 (file)
--- a/arch/x86_64/Kconfig.debug
+++ b/arch/x86_64/Kconfig.debug
@@ -9,6 +9,7 @@ source "lib/Kconfig.debug"
 config DEBUG_RODATA
        bool "Write protect kernel read-only data structures"
        depends on DEBUG_KERNEL
+       depends on !KPROBES # temporary for 2.6.22
        help
         Mark the kernel read-only data as write-protected in the pagetables,
         in order to catch accidental (and incorrect) writes to such const data.