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net: qede: fix use-after-free on recovery and AER handling 

[ Upstream commit ec6c80590b ]

Set edev->cdev pointer to NULL after calling remove() callback to avoid
using of already freed object.

Fixes: ccc67ef50b ("qede: Error recovery process")
Signed-off-by: Alexander Lobakin <alobakin@marvell.com>
Signed-off-by: Igor Russkikh <irusskikh@marvell.com>
Signed-off-by: Michal Kalderon <michal.kalderon@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
Alexander Lobakin 2020-06-23 16:51:35 +03:00 committed by Sasha Levin
parent f490e70fa7
commit 065f225ef9
1 changed files with 1 additions and 0 deletions
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drivers/net/ethernet/qlogic/qede/qede_main.c
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@ -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