linux-kernel - [RFC PATCH v2 19/26] early kprobes: perhibit probing at early kprobe reserved area.

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Message-ID: <1423743660-12846-1-git-send-email-wangnan0@huawei.com>
Date:	Thu, 12 Feb 2015 20:21:00 +0800
From:	Wang Nan <wangnan0@...wei.com>
To:	<linux@....linux.org.uk>, <tglx@...utronix.de>, <mingo@...hat.com>,
	<hpa@...or.com>, <rostedt@...dmis.org>, <ananth@...ibm.com>,
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	<keescook@...omium.org>, <oleg@...hat.com>, <wangnan0@...wei.com>,
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	<Yalin.Wang@...ymobile.com>, <mark.rutland@....com>,
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CC:	<x86@...nel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <lizefan@...wei.com>
Subject: [RFC PATCH v2 19/26] early kprobes: perhibit probing at early kprobe reserved area.

Signed-off-by: Wang Nan <wangnan0@...wei.com>
---
 kernel/kprobes.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index fa1e422..b83c406 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -1358,6 +1358,13 @@ 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 there exists a kprobe_blacklist, verify and
 	 * fail any probe registration in the prohibited area
-- 
1.8.4

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