The patch titled
disallow kprobes on notifier_call_chain
has been added to the -mm tree. Its filename is
disallow-kprobes-on-notifier_call_chain.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: disallow kprobes on notifier_call_chain
From: "bibo,mao" <bibo.mao@xxxxxxxxx>
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@xxxxxxxxx>
Signed-off-by: Ananth N Mavinakayanahalli <ananth@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
kernel/sys.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN kernel/sys.c~disallow-kprobes-on-notifier_call_chain kernel/sys.c
--- a/kernel/sys.c~disallow-kprobes-on-notifier_call_chain
+++ a/kernel/sys.c
@@ -221,7 +221,7 @@ EXPORT_SYMBOL_GPL(atomic_notifier_chain_
* 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;
_
Patches currently in -mm which might be from bibo.mao@xxxxxxxxx are
kprobe-whitespace-cleanup.patch
disallow-kprobes-on-notifier_call_chain.patch
kretprobe-spinlock-deadlock-patch.patch
-
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