linux-kernel - [RFC PATCH v4 16/34] early kprobes: perhibit probing at early kprobe reserved area.

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Message-ID: <1425306312-3437-17-git-send-email-wangnan0@huawei.com>
Date:	Mon, 2 Mar 2015 22:24:54 +0800
From:	Wang Nan <wangnan0@...wei.com>
To:	<rostedt@...dmis.org>, <masami.hiramatsu.pt@...achi.com>,
	<mingo@...e.hu>, <linux@....linux.org.uk>, <tixy@...aro.org>
CC:	<lizefan@...wei.com>, <linux-kernel@...r.kernel.org>,
	<x86@...nel.org>, <linux-arm-kernel@...ts.infradead.org>
Subject: [RFC PATCH v4 16/34] early kprobes: perhibit probing at early kprobe reserved area.

Puts early kprobe reserved area into kprobe blacklist.

Signed-off-by: Wang Nan <wangnan0@...wei.com>
---
 kernel/kprobes.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index 2d178fc..7dbe8b2 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -1405,6 +1405,12 @@ static bool within_kprobe_blacklist(unsigned long addr)
 	if (arch_within_kprobe_blacklist(addr))
 		return true;
 
+#ifdef CONFIG_EARLY_KPROBES
+	if (addr >= (unsigned long)__early_kprobes_start &&
+			addr < (unsigned long)__early_kprobes_end)
+		return true;
+#endif
+
 	if (!kprobes_blacklist_initialized)
 		return within_kprobe_blacklist_early(addr);
 
-- 
1.8.4

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