l2tp: purge socket queues in the .destruct() callback

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[ Upstream commit e91793bb61 ]

The Rx path may grab the socket right before pppol2tp_release(), but
nothing guarantees that it will enqueue packets before
skb_queue_purge(). Therefore, the socket can be destroyed without its
queues fully purged.

Fix this by purging queues in pppol2tp_session_destruct() where we're
guaranteed nothing is still referencing the socket.

Fixes: 9e9cb6221a ("l2tp: fix userspace reception on plain L2TP sockets")
Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Guillaume Nault 2017-03-29 08:45:29 +02:00 • committed by Greg Kroah-Hartman

parent 59bc404b38

commit 3ae0fc9506

1 changed files with 4 additions and 3 deletions

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net/l2tp/l2tp_ppp.c

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