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x86: Disable KPROBES with DEBUG_RODATA for now

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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>
This commit is contained in:
Andi Kleen 2007-06-20 12:23:35 +02:00 committed by Linus Torvalds
parent 9f1f79e641
commit 55181000cd
2 changed files with 2 additions and 0 deletions
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1
arch/i386/Kconfig.debug
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@ -49,6 +49,7 @@ config DEBUG_PAGEALLOC
config DEBUG_RODATA config DEBUG_RODATA
bool "Write protect kernel read-only data structures" bool "Write protect kernel read-only data structures"
depends on DEBUG_KERNEL depends on DEBUG_KERNEL
depends on !KPROBES # temporary for 2.6.22
help help
Mark the kernel read-only data as write-protected in the pagetables, Mark the kernel read-only data as write-protected in the pagetables,
in order to catch accidental (and incorrect) writes to such const in order to catch accidental (and incorrect) writes to such const

1
arch/x86_64/Kconfig.debug
View file

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