This is a note to let you know that I've just added the patch titled
ipv6: fix potential "struct net" leak in inet6_rtm_getaddr()
to the 5.10-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:
ipv6-fix-potential-struct-net-leak-in-inet6_rtm_geta.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit ca7d38a04a22481e03b3d54e697ccb99acc1247d
Author: Eric Dumazet <edumazet@xxxxxxxxxx>
Date: Thu Feb 22 12:17:47 2024 +0000
ipv6: fix potential "struct net" leak in inet6_rtm_getaddr()
[ Upstream commit 10bfd453da64a057bcfd1a49fb6b271c48653cdb ]
It seems that if userspace provides a correct IFA_TARGET_NETNSID value
but no IFA_ADDRESS and IFA_LOCAL attributes, inet6_rtm_getaddr()
returns -EINVAL with an elevated "struct net" refcount.
Fixes: 6ecf4c37eb3e ("ipv6: enable IFA_TARGET_NETNSID for RTM_GETADDR")
Signed-off-by: Eric Dumazet <edumazet@xxxxxxxxxx>
Cc: Christian Brauner <brauner@xxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxxx>
Reviewed-by: David Ahern <dsahern@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 150c2f71ec89f..0429c1d50fc92 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -5436,9 +5436,10 @@ static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh,
}
addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer);
- if (!addr)
- return -EINVAL;
-
+ if (!addr) {
+ err = -EINVAL;
+ goto errout;
+ }
ifm = nlmsg_data(nlh);
if (ifm->ifa_index)
dev = dev_get_by_index(tgt_net, ifm->ifa_index);
