Commits
Eric Dumazet committed c2f34a65a61
tcp/dccp: fix potential NULL deref in __inet_inherit_port()
As we no longer hold listener lock in fast path, it is possible that a
child is created right after listener freed its bound port, if a close()
is done while incoming packets are processed.
__inet_inherit_port() must detect this and return an error,
so that caller can free the child earlier.
Fixes: e994b2f0fb92 ("tcp: do not lock listener to process SYN packets")
Fixes: 079096f103fa ("tcp/dccp: install syn_recv requests into ehash table")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>