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-rw-r--r--net/ipv6/mcast.c40
-rw-r--r--net/ipv6/netfilter.c4
-rw-r--r--net/ipv6/netfilter/ip6t_ah.c5
-rw-r--r--net/ipv6/netfilter/ip6t_hbh.c1
-rw-r--r--net/ipv6/netfilter/ip6t_rt.c3
-rw-r--r--net/ipv6/netfilter/nf_conntrack_reasm.c5
-rw-r--r--net/ipv6/tcp_ipv6.c6
-rw-r--r--net/ipv6/xfrm6_policy.c1
8 files changed, 47 insertions, 18 deletions
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index 04b811b3be97..4d2b9377ba2d 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -1083,8 +1083,10 @@ static void mld_gq_start_work(struct inet6_dev *idev)
mc_assert_locked(idev);
idev->mc_gq_running = 1;
- if (!mod_delayed_work(mld_wq, &idev->mc_gq_work, tv + 2))
- in6_dev_hold(idev);
+ if (in6_dev_hold_safe(idev)) {
+ if (mod_delayed_work(mld_wq, &idev->mc_gq_work, tv + 2))
+ in6_dev_put(idev);
+ }
}
static void mld_gq_stop_work(struct inet6_dev *idev)
@@ -1102,8 +1104,10 @@ static void mld_ifc_start_work(struct inet6_dev *idev, unsigned long delay)
mc_assert_locked(idev);
- if (!mod_delayed_work(mld_wq, &idev->mc_ifc_work, tv + 2))
- in6_dev_hold(idev);
+ if (in6_dev_hold_safe(idev)) {
+ if (mod_delayed_work(mld_wq, &idev->mc_ifc_work, tv + 2))
+ in6_dev_put(idev);
+ }
}
static void mld_ifc_stop_work(struct inet6_dev *idev)
@@ -1121,8 +1125,10 @@ static void mld_dad_start_work(struct inet6_dev *idev, unsigned long delay)
mc_assert_locked(idev);
- if (!mod_delayed_work(mld_wq, &idev->mc_dad_work, tv + 2))
- in6_dev_hold(idev);
+ if (in6_dev_hold_safe(idev)) {
+ if (mod_delayed_work(mld_wq, &idev->mc_dad_work, tv + 2))
+ in6_dev_put(idev);
+ }
}
static void mld_dad_stop_work(struct inet6_dev *idev)
@@ -1395,18 +1401,23 @@ static void mld_process_v2(struct inet6_dev *idev, struct mld2_query *mld,
void igmp6_event_query(struct sk_buff *skb)
{
struct inet6_dev *idev = __in6_dev_get(skb->dev);
+ bool put = false;
if (!idev || idev->dead)
goto out;
spin_lock_bh(&idev->mc_query_lock);
- if (skb_queue_len(&idev->mc_query_queue) < MLD_MAX_SKBS) {
+ if (skb_queue_len(&idev->mc_query_queue) < MLD_MAX_SKBS &&
+ in6_dev_hold_safe(idev)) {
__skb_queue_tail(&idev->mc_query_queue, skb);
- if (!mod_delayed_work(mld_wq, &idev->mc_query_work, 0))
- in6_dev_hold(idev);
+ if (mod_delayed_work(mld_wq, &idev->mc_query_work, 0))
+ put = true;
skb = NULL;
}
spin_unlock_bh(&idev->mc_query_lock);
+
+ if (put)
+ in6_dev_put(idev);
out:
kfree_skb(skb);
}
@@ -1570,18 +1581,23 @@ static void mld_query_work(struct work_struct *work)
void igmp6_event_report(struct sk_buff *skb)
{
struct inet6_dev *idev = __in6_dev_get(skb->dev);
+ bool put = false;
if (!idev || idev->dead)
goto out;
spin_lock_bh(&idev->mc_report_lock);
- if (skb_queue_len(&idev->mc_report_queue) < MLD_MAX_SKBS) {
+ if (skb_queue_len(&idev->mc_report_queue) < MLD_MAX_SKBS &&
+ in6_dev_hold_safe(idev)) {
__skb_queue_tail(&idev->mc_report_queue, skb);
- if (!mod_delayed_work(mld_wq, &idev->mc_report_work, 0))
- in6_dev_hold(idev);
+ if (mod_delayed_work(mld_wq, &idev->mc_report_work, 0))
+ put = true;
skb = NULL;
}
spin_unlock_bh(&idev->mc_report_lock);
+
+ if (put)
+ in6_dev_put(idev);
out:
kfree_skb(skb);
}
diff --git a/net/ipv6/netfilter.c b/net/ipv6/netfilter.c
index 6d80f85e55fa..a7025ec87035 100644
--- a/net/ipv6/netfilter.c
+++ b/net/ipv6/netfilter.c
@@ -120,7 +120,7 @@ int br_ip6_fragment(struct net *net, struct sock *sk, struct sk_buff *skb,
ktime_t tstamp = skb->tstamp;
struct ip6_frag_state state;
u8 *prevhdr, nexthdr = 0;
- unsigned int mtu, hlen;
+ unsigned int mtu, hlen, nexthdr_offset;
int hroom, err = 0;
__be32 frag_id;
@@ -129,6 +129,7 @@ int br_ip6_fragment(struct net *net, struct sock *sk, struct sk_buff *skb,
goto blackhole;
hlen = err;
nexthdr = *prevhdr;
+ nexthdr_offset = prevhdr - skb_network_header(skb);
mtu = skb->dev->mtu;
if (frag_max_size > mtu ||
@@ -147,6 +148,7 @@ int br_ip6_fragment(struct net *net, struct sock *sk, struct sk_buff *skb,
(err = skb_checksum_help(skb)))
goto blackhole;
+ prevhdr = skb_network_header(skb) + nexthdr_offset;
hroom = LL_RESERVED_SPACE(skb->dev);
if (skb_has_frag_list(skb)) {
unsigned int first_len = skb_pagelen(skb);
diff --git a/net/ipv6/netfilter/ip6t_ah.c b/net/ipv6/netfilter/ip6t_ah.c
index 70da2f2ce064..1258783ed876 100644
--- a/net/ipv6/netfilter/ip6t_ah.c
+++ b/net/ipv6/netfilter/ip6t_ah.c
@@ -56,6 +56,11 @@ static bool ah_mt6(const struct sk_buff *skb, struct xt_action_param *par)
}
hdrlen = ipv6_authlen(ah);
+ if (skb->len - ptr < hdrlen) {
+ /* Packet smaller than its length field */
+ par->hotdrop = true;
+ return false;
+ }
pr_debug("IPv6 AH LEN %u %u ", hdrlen, ah->hdrlen);
pr_debug("RES %04X ", ah->reserved);
diff --git a/net/ipv6/netfilter/ip6t_hbh.c b/net/ipv6/netfilter/ip6t_hbh.c
index 450dd53846a2..6d1a5d2026a6 100644
--- a/net/ipv6/netfilter/ip6t_hbh.c
+++ b/net/ipv6/netfilter/ip6t_hbh.c
@@ -75,6 +75,7 @@ hbh_mt6(const struct sk_buff *skb, struct xt_action_param *par)
hdrlen = ipv6_optlen(oh);
if (skb->len - ptr < hdrlen) {
/* Packet smaller than it's length field */
+ par->hotdrop = true;
return false;
}
diff --git a/net/ipv6/netfilter/ip6t_rt.c b/net/ipv6/netfilter/ip6t_rt.c
index 5561bd9cea81..278b52752f36 100644
--- a/net/ipv6/netfilter/ip6t_rt.c
+++ b/net/ipv6/netfilter/ip6t_rt.c
@@ -56,7 +56,8 @@ static bool rt_mt6(const struct sk_buff *skb, struct xt_action_param *par)
hdrlen = ipv6_optlen(rh);
if (skb->len - ptr < hdrlen) {
- /* Pcket smaller than its length field */
+ /* Packet smaller than its length field */
+ par->hotdrop = true;
return false;
}
diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c
index 64ab23ff559b..599c49bf0a0a 100644
--- a/net/ipv6/netfilter/nf_conntrack_reasm.c
+++ b/net/ipv6/netfilter/nf_conntrack_reasm.c
@@ -348,7 +348,8 @@ static int nf_ct_frag6_reasm(struct frag_queue *fq, struct sk_buff *skb,
skb_network_header(skb)[fq->nhoffset] = skb_transport_header(skb)[0];
memmove(skb->head + sizeof(struct frag_hdr), skb->head,
(skb->data - skb->head) - sizeof(struct frag_hdr));
- skb->mac_header += sizeof(struct frag_hdr);
+ if (skb_mac_header_was_set(skb))
+ skb->mac_header += sizeof(struct frag_hdr);
skb->network_header += sizeof(struct frag_hdr);
skb_reset_transport_header(skb);
@@ -418,7 +419,7 @@ find_prev_fhdr(struct sk_buff *skb, u8 *prevhdrp, int *prevhoff, int *fhoff)
return -1;
}
if (skb_copy_bits(skb, start, &hdr, sizeof(hdr)))
- BUG();
+ return -1;
if (nexthdr == NEXTHDR_AUTH)
hdrlen = ipv6_authlen(&hdr);
else
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index ebe161d72fbd..522ba45ce9b7 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -1977,8 +1977,10 @@ do_time_wait:
}
drop_reason = psp_twsk_rx_policy_check(inet_twsk(sk), skb);
- if (drop_reason)
- break;
+ if (drop_reason) {
+ inet_twsk_put(inet_twsk(sk));
+ goto discard_it;
+ }
}
/* to ACK */
fallthrough;
diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c
index 125ea9a5b8a0..3b749475f6ed 100644
--- a/net/ipv6/xfrm6_policy.c
+++ b/net/ipv6/xfrm6_policy.c
@@ -88,6 +88,7 @@ static int xfrm6_fill_dst(struct xfrm_dst *xdst, struct net_device *dev,
xdst->u.rt6.rt6i_idev = in6_dev_get(dev);
if (!xdst->u.rt6.rt6i_idev) {
netdev_put(dev, &xdst->u.dst.dev_tracker);
+ xdst->u.dst.dev = NULL;
return -ENODEV;
}