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 9ff6d4160daba60a77b30248c1d1fb539271c220..77b3d9cc08a18b510b56a999750f7962e720a97e 100644 (file)
--- 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;