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| author | Alex Shi <alex.shi@linaro.org> | 2017-11-30 12:02:52 +0800 |
|---|---|---|
| committer | Alex Shi <alex.shi@linaro.org> | 2017-11-30 12:02:52 +0800 |
| commit | f83b09c3edc03ebcb59e65d6c37bc1bdb49b8210 (patch) | |
| tree | 4617c279cb52c31774284c0bde1ab4fce7efb482 /net/dccp/ipv4.c | |
| parent | c19848defd4890f84d733c14b73dcbc87ea180a4 (diff) | |
| parent | eddc563b9850ce692c6040ef0f4575aea2396d33 (diff) | |
Merge remote-tracking branch 'rt-stable/v4.4-rt' into linux-linaro-lsk-v4.4-rtlsk-v4.4-17.11-rt
Diffstat (limited to 'net/dccp/ipv4.c')
| -rw-r--r-- | net/dccp/ipv4.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c index e217f17997a4..6eb2bbf9873b 100644 --- a/net/dccp/ipv4.c +++ b/net/dccp/ipv4.c @@ -414,8 +414,7 @@ struct sock *dccp_v4_request_recv_sock(const struct sock *sk, sk_daddr_set(newsk, ireq->ir_rmt_addr); sk_rcv_saddr_set(newsk, ireq->ir_loc_addr); newinet->inet_saddr = ireq->ir_loc_addr; - newinet->inet_opt = ireq->opt; - ireq->opt = NULL; + RCU_INIT_POINTER(newinet->inet_opt, rcu_dereference(ireq->ireq_opt)); newinet->mc_index = inet_iif(skb); newinet->mc_ttl = ip_hdr(skb)->ttl; newinet->inet_id = jiffies; @@ -430,7 +429,10 @@ struct sock *dccp_v4_request_recv_sock(const struct sock *sk, if (__inet_inherit_port(sk, newsk) < 0) goto put_and_exit; *own_req = inet_ehash_nolisten(newsk, req_to_sk(req_unhash)); - + if (*own_req) + ireq->ireq_opt = NULL; + else + newinet->inet_opt = NULL; return newsk; exit_overflow: @@ -441,6 +443,7 @@ exit: NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENDROPS); return NULL; put_and_exit: + newinet->inet_opt = NULL; inet_csk_prepare_forced_close(newsk); dccp_done(newsk); goto exit; @@ -492,7 +495,7 @@ static int dccp_v4_send_response(const struct sock *sk, struct request_sock *req ireq->ir_rmt_addr); err = ip_build_and_send_pkt(skb, sk, ireq->ir_loc_addr, ireq->ir_rmt_addr, - ireq->opt); + ireq_opt_deref(ireq)); err = net_xmit_eval(err); } @@ -546,7 +549,7 @@ out: static void dccp_v4_reqsk_destructor(struct request_sock *req) { dccp_feat_list_purge(&dccp_rsk(req)->dreq_featneg); - kfree(inet_rsk(req)->opt); + kfree(rcu_dereference_protected(inet_rsk(req)->ireq_opt, 1)); } void dccp_syn_ack_timeout(const struct request_sock *req) |