This is a note to let you know that I've just added the patch titled
netlink: make sure nladdr has correct size in netlink_connect()
to the 4.14-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:
netlink-make-sure-nladdr-has-correct-size-in-netlink_connect.patch
and it can be found in the queue-4.14 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 Tue Apr 10 23:20:08 CEST 2018
From: Alexander Potapenko <glider@xxxxxxxxxx>
Date: Fri, 23 Mar 2018 13:49:02 +0100
Subject: netlink: make sure nladdr has correct size in netlink_connect()
From: Alexander Potapenko <glider@xxxxxxxxxx>
[ Upstream commit 7880287981b60a6808f39f297bb66936e8bdf57a ]
KMSAN reports use of uninitialized memory in the case when |alen| is
smaller than sizeof(struct sockaddr_nl), and therefore |nladdr| isn't
fully copied from the userspace.
Signed-off-by: Alexander Potapenko <glider@xxxxxxxxxx>
Fixes: 1da177e4c3f41524 ("Linux-2.6.12-rc2")
Reviewed-by: Eric Dumazet <edumazet@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/netlink/af_netlink.c | 3 +++
1 file changed, 3 insertions(+)
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -1053,6 +1053,9 @@ static int netlink_connect(struct socket
if (addr->sa_family != AF_NETLINK)
return -EINVAL;
+ if (alen < sizeof(struct sockaddr_nl))
+ return -EINVAL;
+
if ((nladdr->nl_groups || nladdr->nl_pid) &&
!netlink_allowed(sock, NL_CFG_F_NONROOT_SEND))
return -EPERM;
Patches currently in stable-queue which might be from glider@xxxxxxxxxx are
queue-4.14/netlink-make-sure-nladdr-has-correct-size-in-netlink_connect.patch