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lib/vmd: make sure pcie_cap is not NULL before dereferencing it

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Fixes #1006

Signed-off-by: Konrad Sztyber <konrad.sztyber@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/472385 (master)

(cherry picked from commit 4121477d91)
Change-Id: I761e1cbb49c09318a8d2eda9b4a2ee0bcdcebc37
Signed-off-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/472710
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
This commit is contained in:
Konrad Sztyber 2019-10-25 12:33:01 +02:00 committed by Jim Harris
parent efbcd259ac
commit ecf2ccec7b
1 changed files with 1 additions and 1 deletions
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lib/vmd/vmd.c
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@ -869,7 +869,7 @@ vmd_scan_single_bus(struct vmd_pci_bus *bus, struct vmd_pci_device *parent_bridg
new_bus->self = new_dev; new_bus->self = new_dev;
new_dev->bus_object = new_bus; new_dev->bus_object = new_bus;
if (slot_cap.bit_field.hotplug_capable && if (slot_cap.bit_field.hotplug_capable && new_dev->pcie_cap != NULL &&
new_dev->pcie_cap->express_cap_register.bit_field.slot_implemented) { new_dev->pcie_cap->express_cap_register.bit_field.slot_implemented) {
new_bus->hotplug_buses = vmd_get_hotplug_bus_numbers(new_dev); new_bus->hotplug_buses = vmd_get_hotplug_bus_numbers(new_dev);
new_bus->subordinate_bus += new_bus->hotplug_buses; new_bus->subordinate_bus += new_bus->hotplug_buses;