netdev - [PATCH AUTOSEL 5.10 55/65] net: account alternate interface name memory

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Date:   Fri,  1 Apr 2022 10:41:56 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Jakub Kicinski <kuba@...nel.org>,
        George Shuklin <george.shuklin@...il.com>,
        Sasha Levin <sashal@...nel.org>, davem@...emloft.net,
        pabeni@...hat.com, idosch@...dia.com, petrm@...dia.com,
        edumazet@...gle.com, avagin@...il.com, yajun.deng@...ux.dev,
        cong.wang@...edance.com, netdev@...r.kernel.org
Subject: [PATCH AUTOSEL 5.10 55/65] net: account alternate interface name memory

From: Jakub Kicinski <kuba@...nel.org>

[ Upstream commit 5d26cff5bdbebdf98ba48217c078ff102536f134 ]

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

Reported-by: George Shuklin <george.shuklin@...il.com>
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 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 9ff6d4160dab..77b3d9cc08a1 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -3632,7 +3632,7 @@ 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;
 
-- 
2.34.1