[PATCH] missing copy_to_user check in tun driver.

[davej]

diff -urpN --exclude-from=/home/davej/.exclude bk-linus/drivers/net/tun.c linux-2.5/drivers/net/tun.c
--- bk-linus/drivers/net/tun.c	2003-06-17 00:23:21.000000000 +0100
+++ linux-2.5/drivers/net/tun.c	2003-06-25 12:26:54.000000000 +0100
@@ -459,7 +459,8 @@ static int tun_chr_ioctl(struct inode *i
 		if (err)
 			return err;
 
-		copy_to_user((void *)arg, &ifr, sizeof(ifr));
+		if (copy_to_user((void *)arg, &ifr, sizeof(ifr)))
+			return -EFAULT;
 		return 0;
 	}
 
-
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