net: avoid NULL deref in inet_ctl_sock_destroy()
Under low memory conditions, tcp_sk_init() and icmp_sk_init() can both iterate on all possible cpus and call inet_ctl_sock_destroy(), with eventual NULL pointer. Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -41,7 +41,8 @@ int inet_recv_error(struct sock *sk, struct msghdr *msg, int len,
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static inline void inet_ctl_sock_destroy(struct sock *sk)
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{
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sock_release(sk->sk_socket);
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if (sk)
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sock_release(sk->sk_socket);
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}
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#endif
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