[TUN]: Fix signedness error in tun_get_user().

760bddfb · Ravikiran G. Thirumalai · David S. Miller · 8980383c · 760bddfb
Commit 760bddfb authored Jun 14, 2003 by Ravikiran G. Thirumalai Committed by David S. Miller Jun 14, 2003
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drivers/net/tun.c drivers/net/tun.c +1 -1

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--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -179,7 +179,7 @@ static __inline__ ssize_t tun_get_user(struct tun_struct *tun, struct iovec *iv,
 	size_t len = count;
 	if (!(tun->flags & TUN_NO_PI)) {
-		if ((len -= sizeof(pi)) < 0)
+		if ((len -= sizeof(pi)) > len)
 			return -EINVAL;
 		memcpy_fromiovec((void *)&pi, iv, sizeof(pi));