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| author | WANG Cong <xiyou.wangcong@gmail.com> | 2017-06-24 23:50:30 -0700 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2017-09-15 18:30:16 +0100 |
| commit | 58347335b9c2fd670c2c56e0b26dcfb0454732ce (patch) | |
| tree | 3f6d11cb731d243a86f69bd1e3d2ca9d32c0fac2 /fs/debugfs | |
| parent | 59d9b0eb25c65e7f8edfb1598d2c8d6f0019b7f8 (diff) | |
| download | linux-stable-58347335b9c2fd670c2c56e0b26dcfb0454732ce.tar.gz linux-stable-58347335b9c2fd670c2c56e0b26dcfb0454732ce.tar.bz2 linux-stable-58347335b9c2fd670c2c56e0b26dcfb0454732ce.zip | |
tcp: reset sk_rx_dst in tcp_disconnect()
commit d747a7a51b00984127a88113cdbbc26f91e9d815 upstream.
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>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'fs/debugfs')
0 files changed, 0 insertions, 0 deletions