From: Dexuan Cui decui@microsoft.com
[ Upstream commit 533ca1feed98b0bf024779a14760694c7cb4d431 ]
The slot must be removed before the pci_dev is removed, otherwise a panic can happen due to use-after-free.
Fixes: 15becc2b56c6 ("PCI: hv: Add hv_pci_remove_slots() when we unload the driver") Signed-off-by: Dexuan Cui decui@microsoft.com Signed-off-by: Lorenzo Pieralisi lorenzo.pieralisi@arm.com Cc: stable@vger.kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/pci/host/pci-hyperv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/pci/host/pci-hyperv.c b/drivers/pci/host/pci-hyperv.c index 5a9d945122327..70825689e5a08 100644 --- a/drivers/pci/host/pci-hyperv.c +++ b/drivers/pci/host/pci-hyperv.c @@ -2740,8 +2740,8 @@ static int hv_pci_remove(struct hv_device *hdev) /* Remove the bus from PCI's point of view. */ pci_lock_rescan_remove(); pci_stop_root_bus(hbus->pci_bus); - pci_remove_root_bus(hbus->pci_bus); hv_pci_remove_slots(hbus); + pci_remove_root_bus(hbus->pci_bus); pci_unlock_rescan_remove(); hbus->state = hv_pcibus_removed; }