This is a note to let you know that I've just added the patch titled [PATCH 008/135] i40evf: check rings before freeing resources to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: 0008-i40evf-check-rings-before-freeing-resources.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From a8cad39850bbbd03834ce1c1d21603358f7651fd Mon Sep 17 00:00:00 2001 From: Mitch Williams <mitch.a.williams@xxxxxxxxx> Date: Thu, 19 Nov 2015 11:34:18 -0800 Subject: [PATCH 008/135] i40evf: check rings before freeing resources [ Upstream commit fdb47ae87af537b24977a03bc69cfe1c5c55ca62 ] If the driver gets unloaded during reset recovery, it's possible that it will attempt to free resources when they're already free. Add a check to make sure that the Tx and Rx rings actually exist before dereferencing them to free resources. Change-ID: I4d2b7e9ede49f634d421a4c5deaa5446bc755eee Signed-off-by: Mitch Williams <mitch.a.williams@xxxxxxxxx> Tested-by: Andrew Bowers <andrewx.bowers@xxxxxxxxx> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@xxxxxxxxx> Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/net/ethernet/intel/i40evf/i40evf_main.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/drivers/net/ethernet/intel/i40evf/i40evf_main.c +++ b/drivers/net/ethernet/intel/i40evf/i40evf_main.c @@ -1864,6 +1864,9 @@ void i40evf_free_all_tx_resources(struct { int i; + if (!adapter->tx_rings) + return; + for (i = 0; i < adapter->num_active_queues; i++) if (adapter->tx_rings[i]->desc) i40evf_free_tx_resources(adapter->tx_rings[i]); @@ -1932,6 +1935,9 @@ void i40evf_free_all_rx_resources(struct { int i; + if (!adapter->rx_rings) + return; + for (i = 0; i < adapter->num_active_queues; i++) if (adapter->rx_rings[i]->desc) i40evf_free_rx_resources(adapter->rx_rings[i]); Patches currently in stable-queue which might be from mitch.a.williams@xxxxxxxxx are queue-4.4/0008-i40evf-check-rings-before-freeing-resources.patch queue-4.4/0007-i40e-don-t-add-zero-MAC-filter.patch queue-4.4/0002-i40evf-handle-many-MAC-filters-correctly.patch queue-4.4/0006-i40e-properly-delete-VF-MAC-filters.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html