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net: clear sk_err_soft in sk_clone_lock()

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[ Upstream commit e551c32d57c88923f99f8f010e89ca7ed0735e83 ]

At accept() time, it is possible the parent has a non zero
sk_err_soft, leftover from a prior error.

Make sure we do not leave this value in the child, as it
makes future getsockopt(SO_ERROR) calls quite unreliable.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Eric Dumazet 2016-10-28 13:40:24 -07:00 committed by Greg Kroah-Hartman
parent 74e53a3a05
commit ac4c2cf6f5
1 changed files with 1 additions and 0 deletions
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net/core/sock.c
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@ -1562,6 +1562,7 @@ struct sock *sk_clone_lock(const struct sock *sk, const gfp_t priority)
}
newsk->sk_err = 0;
newsk->sk_err_soft = 0;
newsk->sk_priority = 0;
newsk->sk_incoming_cpu = raw_smp_processor_id();
atomic64_set(&newsk->sk_cookie, 0);