This is a note to let you know that I've just added the patch titled
net: rtnetlink: fix info leak in RTM_GETSTATS call
to the 4.9-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:
net-rtnetlink-fix-info-leak-in-rtm_getstats-call.patch
and it can be found in the queue-4.9 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 Oct 10 16:09:22 CEST 2017
From: Nikolay Aleksandrov <nikolay@xxxxxxxxxxxxxxxxxxx>
Date: Tue, 3 Oct 2017 13:20:48 +0300
Subject: net: rtnetlink: fix info leak in RTM_GETSTATS call
From: Nikolay Aleksandrov <nikolay@xxxxxxxxxxxxxxxxxxx>
[ Upstream commit ce024f42c2e28b6bce4ecc1e891b42f57f753892 ]
When RTM_GETSTATS was added the fields of its header struct were not all
initialized when returning the result thus leaking 4 bytes of information
to user-space per rtnl_fill_statsinfo call, so initialize them now. Thanks
to Alexander Potapenko for the detailed report and bisection.
Reported-by: Alexander Potapenko <glider@xxxxxxxxxx>
Fixes: 10c9ead9f3c6 ("rtnetlink: add new RTM_GETSTATS message to dump link stats")
Signed-off-by: Nikolay Aleksandrov <nikolay@xxxxxxxxxxxxxxxxxxx>
Acked-by: Roopa Prabhu <roopa@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/core/rtnetlink.c | 3 +++
1 file changed, 3 insertions(+)
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -3758,6 +3758,9 @@ static int rtnl_fill_statsinfo(struct sk
return -EMSGSIZE;
ifsm = nlmsg_data(nlh);
+ ifsm->family = PF_UNSPEC;
+ ifsm->pad1 = 0;
+ ifsm->pad2 = 0;
ifsm->ifindex = dev->ifindex;
ifsm->filter_mask = filter_mask;
Patches currently in stable-queue which might be from nikolay@xxxxxxxxxxxxxxxxxxx are
queue-4.9/net-rtnetlink-fix-info-leak-in-rtm_getstats-call.patch