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path: root/drivers/net/wan/x25_asy.c
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Diffstat (limited to 'drivers/net/wan/x25_asy.c')
-rw-r--r--drivers/net/wan/x25_asy.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/net/wan/x25_asy.c b/drivers/net/wan/x25_asy.c
index df6c07357556..5c47b011a9d7 100644
--- a/drivers/net/wan/x25_asy.c
+++ b/drivers/net/wan/x25_asy.c
@@ -122,8 +122,12 @@ static int x25_asy_change_mtu(struct net_device *dev, int newmtu)
{
struct x25_asy *sl = netdev_priv(dev);
unsigned char *xbuff, *rbuff;
- int len = 2 * newmtu;
+ int len;
+ if (newmtu > 65534)
+ return -EINVAL;
+
+ len = 2 * newmtu;
xbuff = kmalloc(len + 4, GFP_ATOMIC);
rbuff = kmalloc(len + 4, GFP_ATOMIC);