From: Dexuan Cui Date: Fri, 2 Aug 2019 22:50:20 +0000 (+0000) Subject: PCI: hv: Avoid use of hv_pci_dev->pci_slot after freeing it X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7d11761a1b0bd71e567a0f4a8a6d7dfbfa9375de;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git PCI: hv: Avoid use of hv_pci_dev->pci_slot after freeing it [ 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 Signed-off-by: Lorenzo Pieralisi Cc: stable@vger.kernel.org Signed-off-by: Sasha Levin --- diff --git a/drivers/pci/host/pci-hyperv.c b/drivers/pci/host/pci-hyperv.c index 5a9d94512232..70825689e5a0 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; }