[PATCH] siox: fix possible buffer overflow in device_add_store

* [PATCH] siox: fix possible buffer overflow in device_add_store
@ 2018-02-14 14:25 Gavin Schenk
  2018-02-14 17:00 ` Uwe Kleine-König
  0 siblings, 1 reply; 3+ messages in thread
From: Gavin Schenk @ 2018-02-14 14:25 UTC (permalink / raw)
  To: linux-kernel, gregkh; +Cc: kernel, dcb314, Gavin Schenk

Width 20 given in format string is larger than destination
buffer 'type[20]', use %19s to prevent overflowing it.

Fixes: bbecb07fa0af ("siox: new driver framework for eckelmann SIOX")
Cc: stable <stable@vger.kernel.org>
Reported-by: David Binderman <dcb314@hotmail.com>
Signed-off-by: Gavin Schenk <g.schenk@eckelmann.de>
Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
 drivers/siox/siox-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/siox/siox-core.c b/drivers/siox/siox-core.c
index fdfcdea25867..16590dfaafa4 100644
--- a/drivers/siox/siox-core.c
+++ b/drivers/siox/siox-core.c
@@ -594,7 +594,7 @@ static ssize_t device_add_store(struct device *dev,
 	size_t inbytes = 0, outbytes = 0;
 	u8 statustype = 0;
 
-	ret = sscanf(buf, "%20s %zu %zu %hhu", type, &inbytes,
+	ret = sscanf(buf, "%19s %zu %zu %hhu", type, &inbytes,
 		     &outbytes, &statustype);
 	if (ret != 3 && ret != 4)
 		return -EINVAL;
-- 
2.15.1


-- 
Eckelmann AG
Vorstand: Dipl.-Ing. Peter Frankenbach (Sprecher) Dipl.-Wi.-Ing. Philipp Eckelmann
Dr.-Ing. Marco Münchhof Dr.-Ing. Frank Uhlemann
Vorsitzender des Aufsichtsrats: Hubertus G. Krossa
Stv. Vorsitzender des Aufsichtsrats: Dr.-Ing. Gerd Eckelmann
Sitz der Gesellschaft: Berliner Str. 161, 65205 Wiesbaden, Amtsgericht Wiesbaden HRB 12636
http://www.eckelmann.de

^ permalink raw reply related	[flat|nested] 3+ messages in thread