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sctp: do not inherit ipv6_{mc|ac|fl}_list from parent 

SCTP needs fixes similar to 83eaddab43 ("ipv6/dccp: do not inherit
ipv6_mc_list from parent"), otherwise bad things can happen.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Tested-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2017-05-17 07:16:40 -07:00 committed by David S. Miller
parent a3f96c47c8
commit fdcee2cbb8
1 changed files with 3 additions and 0 deletions
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3
net/sctp/ipv6.c
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@ -677,6 +677,9 @@ static struct sock *sctp_v6_create_accept_sk(struct sock *sk,
newnp = inet6_sk(newsk); newnp = inet6_sk(newsk);
memcpy(newnp, np, sizeof(struct ipv6_pinfo)); memcpy(newnp, np, sizeof(struct ipv6_pinfo));
newnp->ipv6_mc_list = NULL;
newnp->ipv6_ac_list = NULL;
newnp->ipv6_fl_list = NULL;
rcu_read_lock(); rcu_read_lock();
opt = rcu_dereference(np->opt); opt = rcu_dereference(np->opt);