This is a note to let you know that I've just added the patch titled
rtnetlink: NUL-terminate IFLA_PHYS_PORT_NAME string
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
rtnetlink-nul-terminate-ifla_phys_port_name-string.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Thu May 11 12:38:23 CEST 2017
From: Michal Schmidt <mschmidt@xxxxxxxxxx>
Date: Thu, 4 May 2017 16:48:58 +0200
Subject: rtnetlink: NUL-terminate IFLA_PHYS_PORT_NAME string
From: Michal Schmidt <mschmidt@xxxxxxxxxx>
[ 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@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/core/rtnetlink.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -1018,7 +1018,7 @@ static int rtnl_phys_port_name_fill(stru
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;
Patches currently in stable-queue which might be from mschmidt@xxxxxxxxxx are
queue-4.4/rtnetlink-nul-terminate-ifla_phys_port_name-string.patch