linux-kernel - [RFC] [patch 2/2] Refuse kprobe insertion on _

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Message-Id: <200712171550.15999.srinivasa@in.ibm.com>
Date:	Mon, 17 Dec 2007 15:50:15 +0530
From:	Srinivasa Ds <srinivasa@...ibm.com>
To:	Johannes Weiner <hannes-kernel@...urebad.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, ananth@...ibm.com,
	Masami Hiramatsu <mhiramat@...hat.com>,
	Jim Keniston <jkenisto@...ibm.com>, rusty@...tcorp.com.au
Subject: [RFC] [patch 2/2] Refuse kprobe insertion on __init section code

This patch makes use of persistent_kernel_text_address() to avoid
probing __init functions.

Signed-off-by: Srinivasa DS <srinivasa@...ibm.com>
Signed-off-by: Ananth N Mavinakayanahalli <ananth@...ibm.com>




---
 kernel/kprobes.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Index: linux-2.6.24-rc5-mm1/kernel/kprobes.c
===================================================================
--- linux-2.6.24-rc5-mm1.orig/kernel/kprobes.c
+++ linux-2.6.24-rc5-mm1/kernel/kprobes.c
@@ -520,7 +520,7 @@ static int __kprobes __register_kprobe(s
 		return -EINVAL;
 	p->addr = (kprobe_opcode_t *)(((char *)p->addr)+ p->offset);
 
-	if (!kernel_text_address((unsigned long) p->addr) ||
+	if (!persistent_kernel_text_address((unsigned long) p->addr) ||
 	    in_kprobes_functions((unsigned long) p->addr))
 		return -EINVAL;
 
@@ -662,7 +662,7 @@ int __kprobes register_jprobe(struct jpr
 {
 	unsigned long addr = arch_deref_entry_point(jp->entry);
 
-	if (!kernel_text_address(addr))
+	if (!persistent_kernel_text_address(addr))
 		return -EINVAL;
 
 	/* Todo: Verify probepoint is a function entry point */
--
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