[PATCH] missing copy_to_user check in tun driver.

bd3fda33 · Dave Jones · Linus Torvalds · e6f59c4d · bd3fda33
Commit bd3fda33 authored Aug 13, 2003 by Dave Jones Committed by Linus Torvalds Aug 13, 2003
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drivers/net/tun.c drivers/net/tun.c +2 -1

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--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -475,7 +475,8 @@ static int tun_chr_ioctl(struct inode *inode, struct file *file,
 		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;
 	}