Patch "ipv4/fib: don't warn when primary address is missing if in_dev is dead" has been added to the 4.4-stable tree

This is a note to let you know that I've just added the patch titled

ipv4/fib: don't warn when primary address is missing if in_dev is dead

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
ipv4-fib-don-t-warn-when-primary-address-is-missing-if-in_dev-is-dead.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Paolo Abeni <[email protected]>
Date: Thu, 21 Apr 2016 22:23:31 +0200
Subject: ipv4/fib: don't warn when primary address is missing if in_dev is dead

From: Paolo Abeni <[email protected]>

[ Upstream commit 391a20333b8393ef2e13014e6e59d192c5594471 ]

After commit fbd40ea0180a ("ipv4: Don't do expensive useless work during inetdev destroy.") when deleting an interface, fib_del_ifaddr() can be executed without any primary address present on the dead interface.

The above is safe, but triggers some "bug: prim == NULL" warnings.

This commit avoids warning if the in_dev is dead

---
 net/ipv4/fib_frontend.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

@@ -904,7 +904,11 @@ void fib_del_ifaddr(struct in_ifaddr *if
 	if (ifa->ifa_flags & IFA_F_SECONDARY) {
 		prim = inet_ifa_byprefix(in_dev, any, ifa->ifa_mask);
 		if (!prim) {
-			pr_warn("%s: bug: prim == NULL\n", __func__);
+			/* if the device has been deleted, we don't perform
+			 * address promotion
+			 */
+			if (!in_dev->dead)
+				pr_warn("%s: bug: prim == NULL\n", __func__);
 			return;
 		}
 		if (iprim && iprim != prim) {

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/ipv4-fib-don-t-warn-when-primary-address-is-missing-if-in_dev-is-dead.patch queue-4.4/net-route-enforce-hoplimit-max-value.patch