[PATCH] disallow kprobes on notifier_call_chain

When kprobe is re-entered, the re-entered kprobe kernel path will will call
atomic_notifier_call_chain function, if this function is kprobed that will
incur numerous kprobe recursive fault.  This patch disallows kprobes on
atomic_notifier_call_chain function.

Signed-off-by: bibo, mao <bibo.mao@intel.com>
Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/kernel/sys.c b/kernel/sys.c
index 2460581c928c..398d57923f95 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -221,7 +221,7 @@ EXPORT_SYMBOL_GPL(atomic_notifier_chain_unregister);
  *      of the last notifier function called.
  */
  
-int atomic_notifier_call_chain(struct atomic_notifier_head *nh,
+int __kprobes atomic_notifier_call_chain(struct atomic_notifier_head *nh,
                 unsigned long val, void *v)
 {
         int ret;