linux-kernel - [PATCH] tracing: Keep index within map_pid_to

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Message-ID: <4A37DDEA.3080003@gmail.com>
Date:	Tue, 16 Jun 2009 20:01:14 +0200
From:	Roel Kluin <roel.kluin@...il.com>
To:	rostedt@...dmis.org
CC:	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH] tracing: Keep index within map_pid_to_cmdline[]

Ensure that index `pid' remains within array map_pid_to_cmdline[]

Signed-off-by: Roel Kluin <roel.kluin@...il.com>
---
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 8acd9b8..f359e9e 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -803,7 +803,7 @@ void trace_find_cmdline(int pid, char comm[])
 		return;
 	}
 
-	if (pid > PID_MAX_DEFAULT) {
+	if (pid > PID_MAX_DEFAULT || pid < 0) {
 		strcpy(comm, "<...>");
 		return;
 	}
--
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