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Viewing changes to net/netlink/af_netlink.c

  • Committer: Package Import Robot
  • Author(s): Yves-Alexis Perez
  • Date: 2016-12-20 16:13:41 UTC
  • mfrom: (1.1.16)
  • Revision ID: package-import@ubuntu.com-20161220161341-sec3a0j4hvey3kr7
Tags: 4.8.15-1+grsec201612151923+1
http://bugs.debian.org/848803
* Merge changes from src:linux up to 4.8.15-1.
  - include the flex change, fixing FTBFS.                    closes: #848803
* Update grsecurity to 3.1-4.8.15-201612151923.
* debian/patches:
  - bugfix/all/net-handle-no-dst-on-skb-in-icmp6_send.patch disabled,
    already included in grsecurity.
* set CONFIG_LEGACY_VSYSCALL_NONE following src:linux.

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Lines of Context:
net/netlink/af_netlink.c
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        if (nlk->cb_running) {
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                if (nlk->cb.done)
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                        nlk->cb.done(&nlk->cb);
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                module_put(nlk->cb.module);
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                kfree_skb(nlk->cb.skb);
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        }
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        WARN_ON(nlk_sk(sk)->groups);
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}
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static void netlink_sock_destruct_work(struct work_struct *work)
 
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{
 
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        struct netlink_sock *nlk = container_of(work, struct netlink_sock,
 
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                                                work);
 
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        sk_free(&nlk->sk);
 
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}
 
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/* This lock without WQ_FLAG_EXCLUSIVE is good on UP and it is _very_ bad on
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 * SMP. Look, when several writers sleep and reader wakes them up, all but one
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 * immediately hit write lock and grab all the cpus. Exclusive sleep solves
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static void deferred_put_nlk_sk(struct rcu_head *head)
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{
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        struct netlink_sock *nlk = container_of(head, struct netlink_sock, rcu);
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        sock_put(&nlk->sk);
 
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        struct sock *sk = &nlk->sk;
 
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        if (!atomic_dec_and_test(&sk->sk_refcnt))
 
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                return;
 
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        if (nlk->cb_running && nlk->cb.done) {
 
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                INIT_WORK(&nlk->work, netlink_sock_destruct_work);
 
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                schedule_work(&nlk->work);
 
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                return;
 
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        }
 
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        sk_free(sk);
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}
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static int netlink_release(struct socket *sock)