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[PATCH] disallow kprobes on notifier_call_chain

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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>
This commit is contained in:
bibo,mao 2006-10-02 02:17:34 -07:00 • committed by Linus Torvalds
parent 62c27be0dd
commit f2aa85a0cc
1 changed files with 1 additions and 1 deletions
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2
kernel/sys.c
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@ -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;