Commit f2aa85a0 authored by bibo,mao's avatar bibo,mao Committed by Linus Torvalds
Browse files

[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: default avatarbibo, mao <bibo.mao@intel.com>
Signed-off-by: default avatarAnanth N Mavinakayanahalli <ananth@in.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 62c27be0
...@@ -221,7 +221,7 @@ EXPORT_SYMBOL_GPL(atomic_notifier_chain_unregister); ...@@ -221,7 +221,7 @@ EXPORT_SYMBOL_GPL(atomic_notifier_chain_unregister);
* of the last notifier function called. * 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) unsigned long val, void *v)
{ {
int ret; int ret;
......
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