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PCI: hv: Avoid use of hv_pci_dev->pci_slot after freeing it

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[ Upstream commit 533ca1feed ]

The slot must be removed before the pci_dev is removed, otherwise a panic
can happen due to use-after-free.

Fixes: 15becc2b56 ("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>
This commit is contained in:
Dexuan Cui
2019-08-02 22:50:20 +00:00
committed by Greg Kroah-Hartman
parent ef2baa03b7
commit 08fdaee2d9
1 changed files with 1 additions and 1 deletions
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2
drivers/pci/controller/pci-hyperv.c
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@@ -2706,8 +2706,8 @@ 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;
}