linux-kernel - [tip:tracing/urgent] tracing/kprobes: Fix probe parsing

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Date:	Sun, 14 Feb 2010 09:13:35 GMT
From:	tip-bot for Heiko Carstens <heiko.carstens@...ibm.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	fweisbec@...il.com, rostedt@...dmis.org, heiko.carstens@...ibm.com,
	tglx@...utronix.de, mhiramat@...hat.com, mingo@...e.hu
Subject: [tip:tracing/urgent] tracing/kprobes: Fix probe parsing

Commit-ID:  a9bb18f36c8056f0712fb28c52c0f85d98438dfb
Gitweb:     http://git.kernel.org/tip/a9bb18f36c8056f0712fb28c52c0f85d98438dfb
Author:     Heiko Carstens <heiko.carstens@...ibm.com>
AuthorDate: Wed, 10 Feb 2010 17:23:47 +0100
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Sun, 14 Feb 2010 09:43:58 +0100

tracing/kprobes: Fix probe parsing

Trying to add a probe like:

  echo p:myprobe 0x10000 > /sys/kernel/debug/tracing/kprobe_events

will fail since the wrong pointer is passed to strict_strtoul
when trying to convert the address to an unsigned long.

Signed-off-by: Heiko Carstens <heiko.carstens@...ibm.com>
Acked-by: Masami Hiramatsu <mhiramat@...hat.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Steven Rostedt <rostedt@...dmis.org>
LKML-Reference: <20100210162346.GA6933@...ris.boeblingen.de.ibm.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 kernel/trace/trace_kprobe.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index 6ea90c0..50b1b82 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -689,7 +689,7 @@ static int create_trace_probe(int argc, char **argv)
 			return -EINVAL;
 		}
 		/* an address specified */
-		ret = strict_strtoul(&argv[0][2], 0, (unsigned long *)&addr);
+		ret = strict_strtoul(&argv[1][0], 0, (unsigned long *)&addr);
 		if (ret) {
 			pr_info("Failed to parse address.\n");
 			return ret;
--
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