From: Alex Gartrell <agartrell@fb.com>
Date: Fri, 26 Dec 2014 07:05:03 +0000 (-0800)
Subject: tun: Fixed unsigned/signed comparison
X-Git-Tag: firefly_0821_release~176^2~2371^2~316
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=87897931c83038af4931990af5b9365b41829921;p=firefly-linux-kernel-4.4.55.git

tun: Fixed unsigned/signed comparison

Validated that this was actually using the unsigned comparison with gdb.

Signed-off-by: Alex Gartrell <agartrell@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 8c8dc16839a7..df5e94871844 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -1501,7 +1501,7 @@ static int tun_recvmsg(struct kiocb *iocb, struct socket *sock,
 		goto out;
 	}
 	ret = tun_do_read(tun, tfile, &m->msg_iter, flags & MSG_DONTWAIT);
-	if (ret > total_len) {
+	if (ret > (ssize_t)total_len) {
 		m->msg_flags |= MSG_TRUNC;
 		ret = flags & MSG_TRUNC ? ret : total_len;
 	}