Messages in this thread | | | Date | Wed, 20 Feb 2008 16:07:30 +0530 | From | Ananth N Mavinakayanahalli <> | Subject | Re: [RFC] [PATCH] Refuse kprobe insertion on add/sub_preempt_counter() |
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On Wed, Feb 20, 2008 at 03:45:17PM +0530, Srinivasa Ds wrote: > Kprobes makes use of preempt_disable(),preempt_enable_noresched() and these > functions inturn call add/sub_preempt_count(). So we need to refuse user from > inserting probe in to these functions. > > This patch disallows user from probing add/sub_preempt_count(). > > Signed-off-by: Srinivasa DS <srinivasa@in.ibm.com>
Acked-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
> --- > kernel/sched.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > Index: linux-2.6.25-rc2/kernel/sched.c > =================================================================== > --- linux-2.6.25-rc2.orig/kernel/sched.c > +++ linux-2.6.25-rc2/kernel/sched.c > @@ -3766,7 +3766,7 @@ void scheduler_tick(void) > > #if defined(CONFIG_PREEMPT) && defined(CONFIG_DEBUG_PREEMPT) > > -void add_preempt_count(int val) > +void __kprobes add_preempt_count(int val) > { > /* > * Underflow? > @@ -3782,7 +3782,7 @@ void add_preempt_count(int val) > } > EXPORT_SYMBOL(add_preempt_count); > > -void sub_preempt_count(int val) > +void __kprobes sub_preempt_count(int val) > { > /* > * Underflow? > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >
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