[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 <[email protected]> Signed-off-by: Ananth N Mavinakayanahalli <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
josf · Oct 2, 2006 · f2aa85a · f2aa85a
1 parent 62c27be
commit f2aa85a
Showing 1 changed file with 1 addition and 1 deletion.
diff --git 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;