From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Fri, 15 Apr 2016 14:51:06 +0000 (+0300)
Subject: PCI: acpiphp_ibm: Avoid uninitialized variable reference
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=4d88d5a7bf92e31215543b955b8883dcf6f66c1f;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

PCI: acpiphp_ibm: Avoid uninitialized variable reference

If ibm_get_table_from_acpi() fails then "table" isn't initialized.  Check
for failure so we don't reference "table" unless it's been initialized.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---

diff --git a/drivers/pci/hotplug/acpiphp_ibm.c b/drivers/pci/hotplug/acpiphp_ibm.c
index 2f6d3a1c1726..f6221d739f59 100644
--- a/drivers/pci/hotplug/acpiphp_ibm.c
+++ b/drivers/pci/hotplug/acpiphp_ibm.c
@@ -138,6 +138,8 @@ static union apci_descriptor *ibm_slot_from_id(int id)
 	char *table;
 
 	size = ibm_get_table_from_acpi(&table);
+	if (size < 0)
+		return NULL;
 	des = (union apci_descriptor *)table;
 	if (memcmp(des->header.sig, "aPCI", 4) != 0)
 		goto ibm_slot_done;