linux-kernel - [PATCH 5.4 11/92] iavf: fix double-release of rtnl

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Date:   Mon, 11 Jan 2021 14:01:15 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jakub Kicinski <kuba@...nel.org>,
        Tony Nguyen <anthony.l.nguyen@...el.com>,
        Konrad Jankowski <konrad0.jankowski@...el.com>
Subject: [PATCH 5.4 11/92] iavf: fix double-release of rtnl_lock

From: Jakub Kicinski <kuba@...nel.org>

[ Upstream commit f1340265726e0edf8a8cef28e665b28ad6302ce9 ]

This code does not jump to exit on an error in iavf_lan_add_device(),
so the rtnl_unlock() from the normal path will follow.

Fixes: b66c7bc1cd4d ("iavf: Refactor init state machine")
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
Reviewed-by: Tony Nguyen <anthony.l.nguyen@...el.com>
Tested-by: Konrad Jankowski <konrad0.jankowski@...el.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/intel/iavf/iavf_main.c |    4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

--- a/drivers/net/ethernet/intel/iavf/iavf_main.c
+++ b/drivers/net/ethernet/intel/iavf/iavf_main.c
@@ -1844,11 +1844,9 @@ static int iavf_init_get_resources(struc
 	netif_tx_stop_all_queues(netdev);
 	if (CLIENT_ALLOWED(adapter)) {
 		err = iavf_lan_add_device(adapter);
-		if (err) {
-			rtnl_unlock();
+		if (err)
 			dev_info(&pdev->dev, "Failed to add VF to client API service list: %d\n",
 				 err);
-		}
 	}
 	dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
 	if (netdev->features & NETIF_F_GRO)