From: Patrick Caulfield <patrick@tykepenguin.com>
Date: Wed, 2 Aug 2006 21:14:44 +0000 (-0700)
Subject: [DECNET]: Fix for routing bug
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=9bbf28a1ff7b9d4e7df57829c25638721984277b;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

[DECNET]: Fix for routing bug

This patch fixes a bug in the DECnet routing code where we were
selecting a loopback device in preference to an outward facing device
even when the destination was known non-local. This patch should fix
the problem.

Signed-off-by: Patrick Caulfield <patrick@tykepenguin.com>
Signed-off-by: Steven Whitehouse <steve@chygwyn.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/decnet/dn_route.c b/net/decnet/dn_route.c
index 1355614ec11..743e9fcf7c5 100644
--- a/net/decnet/dn_route.c
+++ b/net/decnet/dn_route.c
@@ -925,8 +925,13 @@ static int dn_route_output_slow(struct dst_entry **pprt, const struct flowi *old
 		for(dev_out = dev_base; dev_out; dev_out = dev_out->next) {
 			if (!dev_out->dn_ptr)
 				continue;
-			if (dn_dev_islocal(dev_out, oldflp->fld_src))
-				break;
+			if (!dn_dev_islocal(dev_out, oldflp->fld_src))
+				continue;
+			if ((dev_out->flags & IFF_LOOPBACK) &&
+			    oldflp->fld_dst &&
+			    !dn_dev_islocal(dev_out, oldflp->fld_dst))
+				continue;
+			break;
 		}
 		read_unlock(&dev_base_lock);
 		if (dev_out == NULL)