https://github.com/torvalds/linux
Revision d747a7a51b00984127a88113cdbbc26f91e9d815 authored by WANG Cong on 25 June 2017, 06:50:30 UTC, committed by David S. Miller on 25 June 2017, 16:23:07 UTC
We have to reset the sk->sk_rx_dst when we disconnect a TCP
connection, because otherwise when we re-connect it this
dst reference is simply overridden in tcp_finish_connect().

This fixes a dst leak which leads to a loopback dev refcnt
leak. It is a long-standing bug, Kevin reported a very similar
(if not same) bug before. Thanks to Andrei for providing such
a reliable reproducer which greatly narrows down the problem.

Fixes: 41063e9dd119 ("ipv4: Early TCP socket demux.")
Reported-by: Andrei Vagin <avagin@gmail.com>
Reported-by: Kevin Xu <kaiwen.xu@hulu.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent 85cb73f
History
Tip revision: d747a7a51b00984127a88113cdbbc26f91e9d815 authored by WANG Cong on 25 June 2017, 06:50:30 UTC
tcp: reset sk_rx_dst in tcp_disconnect()
Tip revision: d747a7a
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.cocciconfig -rw-r--r-- 59 bytes
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.gitattributes -rw-r--r-- 30 bytes
.gitignore -rw-r--r-- 1.3 KB
.mailmap -rw-r--r-- 8.1 KB
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