This is a note to let you know that I've just added the patch titled IB/ipoib: Change list_del to list_del_init in the tx object 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: ib-ipoib-change-list_del-to-list_del_init-in-the-tx-object.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 foo@baz Thu Nov 9 18:22:51 CET 2017 From: Feras Daoud <ferasda@xxxxxxxxxxxx> Date: Wed, 28 Dec 2016 14:47:28 +0200 Subject: IB/ipoib: Change list_del to list_del_init in the tx object From: Feras Daoud <ferasda@xxxxxxxxxxxx> [ Upstream commit 27d41d29c7f093f6f77843624fbb080c1b4a8b9c ] Since ipoib_cm_tx_start function and ipoib_cm_tx_reap function belong to different work queues, they can run in parallel. In this case if ipoib_cm_tx_reap calls list_del and release the lock, ipoib_cm_tx_start may acquire it and call list_del_init on the already deleted object. Changing list_del to list_del_init in ipoib_cm_tx_reap fixes the problem. Fixes: 839fcaba355a ("IPoIB: Connected mode experimental support") Signed-off-by: Feras Daoud <ferasda@xxxxxxxxxxxx> Signed-off-by: Erez Shitrit <erezsh@xxxxxxxxxxxx> Reviewed-by: Alex Vesker <valex@xxxxxxxxxxxx> Signed-off-by: Leon Romanovsky <leon@xxxxxxxxxx> Reviewed-by: Yuval Shaia <yuval.shaia@xxxxxxxxxx> Signed-off-by: Doug Ledford <dledford@xxxxxxxxxx> Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/infiniband/ulp/ipoib/ipoib_cm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/infiniband/ulp/ipoib/ipoib_cm.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_cm.c @@ -1373,7 +1373,7 @@ static void ipoib_cm_tx_reap(struct work while (!list_empty(&priv->cm.reap_list)) { p = list_entry(priv->cm.reap_list.next, typeof(*p), list); - list_del(&p->list); + list_del_init(&p->list); spin_unlock_irqrestore(&priv->lock, flags); netif_tx_unlock_bh(dev); ipoib_cm_tx_destroy(p); Patches currently in stable-queue which might be from ferasda@xxxxxxxxxxxx are queue-4.4/ib-ipoib-change-list_del-to-list_del_init-in-the-tx-object.patch