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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: "Longpeng(Mike)" <longpeng2@huawei.com>,
	"David S . Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>,
	Jorgen Hansen <jhansen@vmware.com>,
	Norbert Slusarek <nslusarek@gmx.net>,
	Andra Paraschiv <andraprs@amazon.com>,
	Colin Ian King <colin.king@canonical.com>,
	David Brazdil <dbrazdil@google.com>,
	Alexander Popov <alex.popov@linux.com>,
	Stefano Garzarella <sgarzare@redhat.com>,
	lixianming <lixianming5@huawei.com>,
	Sasha Levin <sashal@kernel.org>,
	netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 4.14 34/45] vsock: notify server to shutdown when client has pending signal
Date: Tue,  6 Jul 2021 07:27:38 -0400	[thread overview]
Message-ID: <20210706112749.2065541-34-sashal@kernel.org> (raw)
In-Reply-To: <20210706112749.2065541-1-sashal@kernel.org>

From: "Longpeng(Mike)" <longpeng2@huawei.com>

[ Upstream commit c7ff9cff70601ea19245d997bb977344663434c7 ]

The client's sk_state will be set to TCP_ESTABLISHED if the server
replay the client's connect request.

However, if the client has pending signal, its sk_state will be set
to TCP_CLOSE without notify the server, so the server will hold the
corrupt connection.

            client                        server

1. sk_state=TCP_SYN_SENT         |
2. call ->connect()              |
3. wait reply                    |
                                 | 4. sk_state=TCP_ESTABLISHED
                                 | 5. insert to connected list
                                 | 6. reply to the client
7. sk_state=TCP_ESTABLISHED      |
8. insert to connected list      |
9. *signal pending* <--------------------- the user kill client
10. sk_state=TCP_CLOSE           |
client is exiting...             |
11. call ->release()             |
     virtio_transport_close
      if (!(sk->sk_state == TCP_ESTABLISHED ||
	      sk->sk_state == TCP_CLOSING))
		return true; *return at here, the server cannot notice the connection is corrupt*

So the client should notify the peer in this case.

Cc: David S. Miller <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Jorgen Hansen <jhansen@vmware.com>
Cc: Norbert Slusarek <nslusarek@gmx.net>
Cc: Andra Paraschiv <andraprs@amazon.com>
Cc: Colin Ian King <colin.king@canonical.com>
Cc: David Brazdil <dbrazdil@google.com>
Cc: Alexander Popov <alex.popov@linux.com>
Suggested-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://lkml.org/lkml/2021/5/17/418
Signed-off-by: lixianming <lixianming5@huawei.com>
Signed-off-by: Longpeng(Mike) <longpeng2@huawei.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/vmw_vsock/af_vsock.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
index ae85a5e5648b..02a171916dd2 100644
--- a/net/vmw_vsock/af_vsock.c
+++ b/net/vmw_vsock/af_vsock.c
@@ -1232,7 +1232,7 @@ static int vsock_stream_connect(struct socket *sock, struct sockaddr *addr,
 
 		if (signal_pending(current)) {
 			err = sock_intr_errno(timeout);
-			sk->sk_state = TCP_CLOSE;
+			sk->sk_state = sk->sk_state == TCP_ESTABLISHED ? TCP_CLOSING : TCP_CLOSE;
 			sock->state = SS_UNCONNECTED;
 			vsock_transport_cancel_pkt(vsk);
 			goto out_wait;
-- 
2.30.2


  parent reply	other threads:[~2021-07-06 11:38 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20210706112749.2065541-1-sashal@kernel.org>
2021-07-06 11:27 ` [PATCH AUTOSEL 4.14 05/45] net: pch_gbe: Use proper accessors to BE data in pch_ptp_match() Sasha Levin
2021-07-06 11:27 ` [PATCH AUTOSEL 4.14 07/45] atm: iphase: fix possible use-after-free in ia_module_exit() Sasha Levin
2021-07-06 11:27 ` [PATCH AUTOSEL 4.14 08/45] mISDN: fix possible use-after-free in HFC_cleanup() Sasha Levin
2021-07-06 11:27 ` [PATCH AUTOSEL 4.14 09/45] atm: nicstar: Fix possible use-after-free in nicstar_cleanup() Sasha Levin
2021-07-06 11:27 ` [PATCH AUTOSEL 4.14 10/45] net: Treat __napi_schedule_irqoff() as __napi_schedule() on PREEMPT_RT Sasha Levin
2021-07-06 11:27 ` [PATCH AUTOSEL 4.14 15/45] e100: handle eeprom as little endian Sasha Levin
2021-07-06 11:27 ` [PATCH AUTOSEL 4.14 18/45] ipv6: use prandom_u32() for ID generation Sasha Levin
2021-07-06 11:27 ` [PATCH AUTOSEL 4.14 21/45] virtio_net: Remove BUG() to avoid machine dead Sasha Levin
2021-07-06 11:27 ` [PATCH AUTOSEL 4.14 22/45] net: bcmgenet: check return value after calling platform_get_resource() Sasha Levin
2021-07-06 11:27 ` [PATCH AUTOSEL 4.14 23/45] net: micrel: " Sasha Levin
2021-07-06 11:27 ` [PATCH AUTOSEL 4.14 24/45] net: moxa: Use devm_platform_get_and_ioremap_resource() Sasha Levin
2021-07-06 11:27 ` [PATCH AUTOSEL 4.14 25/45] fjes: check return value after calling platform_get_resource() Sasha Levin
2021-07-06 11:27 ` [PATCH AUTOSEL 4.14 27/45] xfrm: Fix error reporting in xfrm_state_construct Sasha Levin
2021-07-06 11:27 ` [PATCH AUTOSEL 4.14 28/45] wlcore/wl12xx: Fix wl12xx get_mac error if device is in ELP Sasha Levin
2021-07-06 11:27 ` [PATCH AUTOSEL 4.14 29/45] wl1251: Fix possible buffer overflow in wl1251_cmd_scan Sasha Levin
2021-07-06 11:27 ` [PATCH AUTOSEL 4.14 30/45] cw1200: add missing MODULE_DEVICE_TABLE Sasha Levin
2021-07-06 11:27 ` [PATCH AUTOSEL 4.14 32/45] atm: nicstar: use 'dma_free_coherent' instead of 'kfree' Sasha Levin
2021-07-06 11:27 ` [PATCH AUTOSEL 4.14 33/45] atm: nicstar: register the interrupt handler in the right place Sasha Levin
2021-07-06 11:27 ` Sasha Levin [this message]
2021-07-06 11:27 ` [PATCH AUTOSEL 4.14 36/45] iwlwifi: mvm: don't change band on bound PHY contexts Sasha Levin
2021-07-06 11:27 ` [PATCH AUTOSEL 4.14 37/45] sfc: avoid double pci_remove of VFs Sasha Levin
2021-07-06 11:27 ` [PATCH AUTOSEL 4.14 38/45] sfc: error code if SRIOV cannot be disabled Sasha Levin
2021-07-06 11:27 ` [PATCH AUTOSEL 4.14 39/45] wireless: wext-spy: Fix out-of-bounds warning Sasha Levin
2021-07-06 11:27 ` [PATCH AUTOSEL 4.14 41/45] Bluetooth: Fix the HCI to MGMT status conversion table Sasha Levin
2021-07-06 11:27 ` [PATCH AUTOSEL 4.14 42/45] Bluetooth: Shutdown controller after workqueues are flushed or cancelled Sasha Levin
2021-07-06 11:27 ` [PATCH AUTOSEL 4.14 44/45] sctp: validate from_addr_param return Sasha Levin
2021-07-06 11:27 ` [PATCH AUTOSEL 4.14 45/45] sctp: add size validation when walking chunks Sasha Levin

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