From d0b2f91bede3bd5e3d24dd6803e56eee959c1797 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Andr=C3=A9=20Fabian=20Silva=20Delgado?= Date: Thu, 20 Oct 2016 00:10:27 -0300 Subject: Linux-libre 4.8.2-gnu --- net/ipv6/tcp_ipv6.c | 41 +++++++++++++++++++++++++---------------- 1 file changed, 25 insertions(+), 16 deletions(-) (limited to 'net/ipv6/tcp_ipv6.c') diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index a2aaca9be..27a968b88 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -459,6 +459,7 @@ static int tcp_v6_send_synack(const struct sock *sk, struct dst_entry *dst, { struct inet_request_sock *ireq = inet_rsk(req); struct ipv6_pinfo *np = inet6_sk(sk); + struct ipv6_txoptions *opt; struct flowi6 *fl6 = &fl->u.ip6; struct sk_buff *skb; int err = -ENOMEM; @@ -479,8 +480,10 @@ static int tcp_v6_send_synack(const struct sock *sk, struct dst_entry *dst, fl6->flowlabel = ip6_flowlabel(ipv6_hdr(ireq->pktopts)); rcu_read_lock(); - err = ip6_xmit(sk, skb, fl6, rcu_dereference(np->opt), - np->tclass); + opt = ireq->ipv6_opt; + if (!opt) + opt = rcu_dereference(np->opt); + err = ip6_xmit(sk, skb, fl6, opt, np->tclass); rcu_read_unlock(); err = net_xmit_eval(err); } @@ -492,6 +495,7 @@ done: static void tcp_v6_reqsk_destructor(struct request_sock *req) { + kfree(inet_rsk(req)->ipv6_opt); kfree_skb(inet_rsk(req)->pktopts); } @@ -542,26 +546,33 @@ static int tcp_v6_parse_md5_keys(struct sock *sk, char __user *optval, AF_INET6, cmd.tcpm_key, cmd.tcpm_keylen, GFP_KERNEL); } -static int tcp_v6_md5_hash_pseudoheader(struct tcp_md5sig_pool *hp, - const struct in6_addr *daddr, - const struct in6_addr *saddr, int nbytes) +static int tcp_v6_md5_hash_headers(struct tcp_md5sig_pool *hp, + const struct in6_addr *daddr, + const struct in6_addr *saddr, + const struct tcphdr *th, int nbytes) { struct tcp6_pseudohdr *bp; struct scatterlist sg; + struct tcphdr *_th; - bp = &hp->md5_blk.ip6; + bp = hp->scratch; /* 1. TCP pseudo-header (RFC2460) */ bp->saddr = *saddr; bp->daddr = *daddr; bp->protocol = cpu_to_be32(IPPROTO_TCP); bp->len = cpu_to_be32(nbytes); - sg_init_one(&sg, bp, sizeof(*bp)); - ahash_request_set_crypt(hp->md5_req, &sg, NULL, sizeof(*bp)); + _th = (struct tcphdr *)(bp + 1); + memcpy(_th, th, sizeof(*th)); + _th->check = 0; + + sg_init_one(&sg, bp, sizeof(*bp) + sizeof(*th)); + ahash_request_set_crypt(hp->md5_req, &sg, NULL, + sizeof(*bp) + sizeof(*th)); return crypto_ahash_update(hp->md5_req); } -static int tcp_v6_md5_hash_hdr(char *md5_hash, struct tcp_md5sig_key *key, +static int tcp_v6_md5_hash_hdr(char *md5_hash, const struct tcp_md5sig_key *key, const struct in6_addr *daddr, struct in6_addr *saddr, const struct tcphdr *th) { @@ -575,9 +586,7 @@ static int tcp_v6_md5_hash_hdr(char *md5_hash, struct tcp_md5sig_key *key, if (crypto_ahash_init(req)) goto clear_hash; - if (tcp_v6_md5_hash_pseudoheader(hp, daddr, saddr, th->doff << 2)) - goto clear_hash; - if (tcp_md5_hash_header(hp, th)) + if (tcp_v6_md5_hash_headers(hp, daddr, saddr, th, th->doff << 2)) goto clear_hash; if (tcp_md5_hash_key(hp, key)) goto clear_hash; @@ -622,9 +631,7 @@ static int tcp_v6_md5_hash_skb(char *md5_hash, if (crypto_ahash_init(req)) goto clear_hash; - if (tcp_v6_md5_hash_pseudoheader(hp, daddr, saddr, skb->len)) - goto clear_hash; - if (tcp_md5_hash_header(hp, th)) + if (tcp_v6_md5_hash_headers(hp, daddr, saddr, th, skb->len)) goto clear_hash; if (tcp_md5_hash_skb_data(hp, skb, th->doff << 2)) goto clear_hash; @@ -1131,7 +1138,9 @@ static struct sock *tcp_v6_syn_recv_sock(const struct sock *sk, struct sk_buff * but we make one more one thing there: reattach optmem to newsk. */ - opt = rcu_dereference(np->opt); + opt = ireq->ipv6_opt; + if (!opt) + opt = rcu_dereference(np->opt); if (opt) { opt = ipv6_dup_options(newsk, opt); RCU_INIT_POINTER(newnp->opt, opt); -- cgit v1.2.3