netdev - [PATCH net-next] rtnetlink: enable alt

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 31 Mar 2022 14:37:28 +0200
From:   Florent Fourcot <florent.fourcot@...irst.fr>
To:     netdev@...r.kernel.org
Cc:     Florent Fourcot <florent.fourcot@...irst.fr>,
        Brian Baboch <brian.baboch@...irst.fr>
Subject: [PATCH net-next] rtnetlink: enable alt_ifname for setlink/newlink

buffer is always valid when called by setlink/newlink,
but contains only empty string when IFLA_IFNAME is not given. So
IFLA_ALT_IFNAME is always ignored

Fixes: 76c9ac0ee878 ("net: rtnetlink: add possibility to use alternative names as message handle")
Signed-off-by: Florent Fourcot <florent.fourcot@...irst.fr>
Signed-off-by: Brian Baboch <brian.baboch@...irst.fr>
---
 net/core/rtnetlink.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 3313419bbcba..613065a53b34 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -2979,7 +2979,7 @@ static struct net_device *rtnl_dev_get(struct net *net,
 {
 	char buffer[ALTIFNAMSIZ];
 
-	if (!ifname) {
+	if (!ifname || !ifname[0]) {
 		ifname = buffer;
 		if (ifname_attr)
 			nla_strscpy(ifname, ifname_attr, IFNAMSIZ);
-- 
2.30.2