This is a note to let you know that I've just added the patch titled
netlink: avoid a double skb free in genlmsg_mcast()
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:
netlink-avoid-a-double-skb-free-in-genlmsg_mcast.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 Wed Mar 28 20:16:33 CEST 2018
From: Nicolas Dichtel <nicolas.dichtel@xxxxxxxxx>
Date: Wed, 14 Mar 2018 21:10:23 +0100
Subject: netlink: avoid a double skb free in genlmsg_mcast()
From: Nicolas Dichtel <nicolas.dichtel@xxxxxxxxx>
[ Upstream commit 02a2385f37a7c6594c9d89b64c4a1451276f08eb ]
nlmsg_multicast() consumes always the skb, thus the original skb must be
freed only when this function is called with a clone.
Fixes: cb9f7a9a5c96 ("netlink: ensure to loop over all netns in genlmsg_multicast_allns()")
Reported-by: Ben Hutchings <ben.hutchings@xxxxxxxxxxxxxxx>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/netlink/genetlink.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/netlink/genetlink.c
+++ b/net/netlink/genetlink.c
@@ -1128,7 +1128,7 @@ static int genlmsg_mcast(struct sk_buff
if (!err)
delivered = true;
else if (err != -ESRCH)
- goto error;
+ return err;
return delivered ? 0 : -ESRCH;
error:
kfree_skb(skb);
Patches currently in stable-queue which might be from nicolas.dichtel@xxxxxxxxx are
queue-4.9/netlink-avoid-a-double-skb-free-in-genlmsg_mcast.patch