linux-kernel - [PATCH] arch: ia64: hp: sim: sprintf() memory overflow, need really use the default value just as it has already said.

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Message-ID: <51A6BAF6.4010901@asianux.com>
Date:	Thu, 30 May 2013 10:35:34 +0800
From:	Chen Gang <gang.chen@...anux.com>
To:	tony.luck@...el.com, fenghua.yu@...el.com
CC:	linux-ia64@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Linux-Arch <linux-arch@...r.kernel.org>
Subject: [PATCH] arch: ia64: hp: sim: sprintf() memory overflow, need really
 use the default value just as it has already said.


When "strlen(s) > MAX_ROOT_LEN", it has already said to use the default
value, but in fact, it still use the input value.

If happens, next sprintf() for 'fname' in simscsi_queuecommand_lck()
may be memory overflow.


Signed-off-by: Chen Gang <gang.chen@...anux.com>
---
 arch/ia64/hp/sim/simscsi.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/ia64/hp/sim/simscsi.c b/arch/ia64/hp/sim/simscsi.c
index 331de72..3a428f1 100644
--- a/arch/ia64/hp/sim/simscsi.c
+++ b/arch/ia64/hp/sim/simscsi.c
@@ -88,8 +88,8 @@ simscsi_setup (char *s)
 	if (strlen(s) > MAX_ROOT_LEN) {
 		printk(KERN_ERR "simscsi_setup: prefix too long---using default %s\n",
 		       simscsi_root);
-	}
-	simscsi_root = s;
+	} else
+		simscsi_root = s;
 	return 1;
 }
 
-- 
1.7.7.6
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