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authorEric Dumazet <edumazet@google.com>2016-11-22 09:06:45 -0800
committerDavid S. Miller <davem@davemloft.net>2016-11-24 15:32:14 -0500
commit30c7be26fd3587abcb69587f781098e3ca2d565b (patch)
tree72bc8ac2183042913c6bf7d9332f811b11378f02 /net/ipv6
parent764d3be6e415b40056834bfd29b994dc3f837606 (diff)
udplite: call proper backlog handlers
In commits 93821778def10 ("udp: Fix rcv socket locking") and f7ad74fef3af ("net/ipv6/udp: UDP encapsulation: break backlog_rcv into __udpv6_queue_rcv_skb") UDP backlog handlers were renamed, but UDPlite was forgotten. This leads to crashes if UDPlite header is pulled twice, which happens starting from commit e6afc8ace6dd ("udp: remove headers from UDP packets before queueing") Bug found by syzkaller team, thanks a lot guys ! Note that backlog use in UDP/UDPlite is scheduled to be removed starting from linux-4.10, so this patch is only needed up to linux-4.9 Fixes: 93821778def1 ("udp: Fix rcv socket locking") Fixes: f7ad74fef3af ("net/ipv6/udp: UDP encapsulation: break backlog_rcv into __udpv6_queue_rcv_skb") Fixes: e6afc8ace6dd ("udp: remove headers from UDP packets before queueing") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Andrey Konovalov <andreyknvl@google.com> Cc: Benjamin LaHaise <bcrl@kvack.org> Cc: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/udp.c2
-rw-r--r--net/ipv6/udp_impl.h2
-rw-r--r--net/ipv6/udplite.c2
3 files changed, 3 insertions, 3 deletions
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index e5056d4873d1..e4a8000d59ad 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -514,7 +514,7 @@ out:
return;
}
-static int __udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
+int __udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
{
int rc;
diff --git a/net/ipv6/udp_impl.h b/net/ipv6/udp_impl.h
index f6eb1ab34f4b..e78bdc76dcc3 100644
--- a/net/ipv6/udp_impl.h
+++ b/net/ipv6/udp_impl.h
@@ -26,7 +26,7 @@ int compat_udpv6_getsockopt(struct sock *sk, int level, int optname,
int udpv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len);
int udpv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int noblock,
int flags, int *addr_len);
-int udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
+int __udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
void udpv6_destroy_sock(struct sock *sk);
#ifdef CONFIG_PROC_FS
diff --git a/net/ipv6/udplite.c b/net/ipv6/udplite.c
index 47d0d2b87106..2f5101a12283 100644
--- a/net/ipv6/udplite.c
+++ b/net/ipv6/udplite.c
@@ -45,7 +45,7 @@ struct proto udplitev6_prot = {
.getsockopt = udpv6_getsockopt,
.sendmsg = udpv6_sendmsg,
.recvmsg = udpv6_recvmsg,
- .backlog_rcv = udpv6_queue_rcv_skb,
+ .backlog_rcv = __udpv6_queue_rcv_skb,
.hash = udp_lib_hash,
.unhash = udp_lib_unhash,
.get_port = udp_v6_get_port,