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authorMichal Schmidt <mschmidt@redhat.com>2017-05-04 16:48:58 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-05-14 13:32:58 +0200
commit545f144825390ab93fef326cfa99ab246c02955c (patch)
tree955a009ddc964321f2b8c178c57227171d36d685
parent1a12d1925795170e6748e3bc663b0e8a2f750ee3 (diff)
rtnetlink: NUL-terminate IFLA_PHYS_PORT_NAME string
[ Upstream commit 77ef033b687c3e030017c94a29bf6ea3aaaef678 ] IFLA_PHYS_PORT_NAME is a string attribute, so terminate it with \0. Otherwise libnl3 fails to validate netlink messages with this attribute. "ip -detail a" assumes too that the attribute is NUL-terminated when printing it. It often was, due to padding. I noticed this as libvirtd failing to start on a system with sfc driver after upgrading it to Linux 4.11, i.e. when sfc added support for phys_port_name. Signed-off-by: Michal Schmidt <mschmidt@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--net/core/rtnetlink.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index b94e165a4f79..fe38ef58997c 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -1018,7 +1018,7 @@ static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
return err;
}
- if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name))
+ if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name))
return -EMSGSIZE;
return 0;