From 863981e96738983919de841ec669e157e6bdaeb0 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Sun, 11 Sep 2016 04:34:46 -0300
Subject: Linux-libre 4.7.1-gnu

---
 drivers/hwmon/dell-smm-hwmon.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'drivers/hwmon/dell-smm-hwmon.c')

diff --git a/drivers/hwmon/dell-smm-hwmon.c b/drivers/hwmon/dell-smm-hwmon.c
index a9356a3de..2ac87d553 100644
--- a/drivers/hwmon/dell-smm-hwmon.c
+++ b/drivers/hwmon/dell-smm-hwmon.c
@@ -35,6 +35,7 @@
 #include <linux/uaccess.h>
 #include <linux/io.h>
 #include <linux/sched.h>
+#include <linux/ctype.h>
 
 #include <linux/i8k.h>
 
@@ -403,6 +404,10 @@ i8k_ioctl_unlocked(struct file *fp, unsigned int cmd, unsigned long arg)
 
 	switch (cmd) {
 	case I8K_BIOS_VERSION:
+		if (!isdigit(bios_version[0]) || !isdigit(bios_version[1]) ||
+		    !isdigit(bios_version[2]))
+			return -EINVAL;
+
 		val = (bios_version[0] << 16) |
 				(bios_version[1] << 8) | bios_version[2];
 		break;
-- 
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