This is a note to let you know that I've just added the patch titled net: qede: fix use-after-free on recovery and AER handling to the 5.4-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: net-qede-fix-use-after-free-on-recovery-and-aer-hand.patch and it can be found in the queue-5.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 3555102f541d6cbcdc9c45b5b878e5758de43f23 Author: Alexander Lobakin <alobakin@xxxxxxxxxxx> Date: Tue Jun 23 16:51:35 2020 +0300 net: qede: fix use-after-free on recovery and AER handling [ Upstream commit ec6c80590bde6b5dfa4970fffa3572f1acd313ca ] Set edev->cdev pointer to NULL after calling remove() callback to avoid using of already freed object. Fixes: ccc67ef50b90 ("qede: Error recovery process") Signed-off-by: Alexander Lobakin <alobakin@xxxxxxxxxxx> Signed-off-by: Igor Russkikh <irusskikh@xxxxxxxxxxx> Signed-off-by: Michal Kalderon <michal.kalderon@xxxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/net/ethernet/qlogic/qede/qede_main.c b/drivers/net/ethernet/qlogic/qede/qede_main.c index 361a1d759b0b5..2c3d654c84543 100644 --- a/drivers/net/ethernet/qlogic/qede/qede_main.c +++ b/drivers/net/ethernet/qlogic/qede/qede_main.c @@ -1247,6 +1247,7 @@ static void __qede_remove(struct pci_dev *pdev, enum qede_remove_mode mode) if (system_state == SYSTEM_POWER_OFF) return; qed_ops->common->remove(cdev); + edev->cdev = NULL; /* Since this can happen out-of-sync with other flows, * don't release the netdevice until after slowpath stop