net: account alternate interface name memory

BugLink: https://bugs.launchpad.net/bugs/1969107
[ 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>
(cherry picked from commit 601f748029f35f1e4065a87406dd855142e22c81)
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 91d7a5a5a08d04ab640c0b5bd553ec979bfb6c3c..a8c319dc224a09396fed7af54a3772f485af6390 100644 (file)
--- 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;