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authorSteffen Klassert <steffen.klassert@secunet.com>2019-03-20 19:54:44 +0300
committerSteffen Klassert <steffen.klassert@secunet.com>2019-03-20 19:56:13 +0300
commitbfc01ddff2b0c33de21af436324a669e95ac7e78 (patch)
treea9f9d79a762c820824f2420538d79983d90e4580 /net/xfrm
parent6ee02a54ef990a71bf542b6f0a4e3321de9d9c66 (diff)
downloadlinux-bfc01ddff2b0c33de21af436324a669e95ac7e78.tar.xz
Revert "net: xfrm: Add '_rcu' tag for rcu protected pointer in netns_xfrm"
This reverts commit f10e0010fae8174dc20bdc872bcaa85baa925cb7. This commit was just wrong. It caused a lot of syzbot warnings, so just revert it. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'net/xfrm')
-rw-r--r--net/xfrm/xfrm_user.c30
1 files changed, 7 insertions, 23 deletions
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index 944589832343..8d4d52fd457b 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -1071,22 +1071,6 @@ static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb,
return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC);
}
-/* A similar wrapper like xfrm_nlmsg_multicast checking that nlsk is still
- * available.
- */
-static inline int xfrm_nlmsg_unicast(struct net *net, struct sk_buff *skb,
- u32 pid)
-{
- struct sock *nlsk = rcu_dereference(net->xfrm.nlsk);
-
- if (!nlsk) {
- kfree_skb(skb);
- return -EPIPE;
- }
-
- return nlmsg_unicast(nlsk, skb, pid);
-}
-
static inline unsigned int xfrm_spdinfo_msgsize(void)
{
return NLMSG_ALIGN(4)
@@ -1211,7 +1195,7 @@ static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
err = build_spdinfo(r_skb, net, sportid, seq, *flags);
BUG_ON(err < 0);
- return xfrm_nlmsg_unicast(net, r_skb, sportid);
+ return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
}
static inline unsigned int xfrm_sadinfo_msgsize(void)
@@ -1270,7 +1254,7 @@ static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
err = build_sadinfo(r_skb, net, sportid, seq, *flags);
BUG_ON(err < 0);
- return xfrm_nlmsg_unicast(net, r_skb, sportid);
+ return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
}
static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
@@ -1290,7 +1274,7 @@ static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
if (IS_ERR(resp_skb)) {
err = PTR_ERR(resp_skb);
} else {
- err = xfrm_nlmsg_unicast(net, resp_skb, NETLINK_CB(skb).portid);
+ err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
}
xfrm_state_put(x);
out_noput:
@@ -1353,7 +1337,7 @@ static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
goto out;
}
- err = xfrm_nlmsg_unicast(net, resp_skb, NETLINK_CB(skb).portid);
+ err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
out:
xfrm_state_put(x);
@@ -1919,8 +1903,8 @@ static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
if (IS_ERR(resp_skb)) {
err = PTR_ERR(resp_skb);
} else {
- err = xfrm_nlmsg_unicast(net, resp_skb,
- NETLINK_CB(skb).portid);
+ err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
+ NETLINK_CB(skb).portid);
}
} else {
xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
@@ -2078,7 +2062,7 @@ static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
err = build_aevent(r_skb, x, &c);
BUG_ON(err < 0);
- err = xfrm_nlmsg_unicast(net, r_skb, NETLINK_CB(skb).portid);
+ err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid);
spin_unlock_bh(&x->lock);
xfrm_state_put(x);
return err;