From: Jakub Kicinski <kuba@kernel.org>
Date: Wed, 9 Mar 2022 18:29:13 +0000 (-0800)
Subject: net: account alternate interface name memory
X-Git-Tag: v5.16.20~190
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6ee094edfec89132cd98020acdc3636b710481d0;p=thirdparty%2Fkernel%2Fstable.git

net: account alternate interface name memory

[ Upstream commit 5d26cff5bdbebdf98ba48217c078ff102536f134 ]

George reports that altnames can eat up kernel memory.
We should charge that memory appropriately.

Reported-by: George Shuklin <george.shuklin@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 8b5c5703d7582..6a7883ec0489c 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -3637,7 +3637,7 @@ static int rtnl_alt_ifname(int cmd, struct net_device *dev, struct nlattr *attr,
 	if (err)
 		return err;
 
-	alt_ifname = nla_strdup(attr, GFP_KERNEL);
+	alt_ifname = nla_strdup(attr, GFP_KERNEL_ACCOUNT);
 	if (!alt_ifname)
 		return -ENOMEM;