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PCI: keystone: Fix if-statement expression in ks_pcie_quirk() 

[ Upstream commit 6188a1c762eb9bbd444f47696eda77a5eae6207a ]

Follow-Up Fix: CVE-2024-47756

This code accidentally uses && where || was intended.  It potentially
results in a NULL dereference.

Thus, fix the if-statement expression to use the correct condition.

Fixes: 86f271f22bbb ("PCI: keystone: Add workaround for Errata #i2037 (AM65x SR 1.0)")
Link: https://lore.kernel.org/linux-pci/1b762a93-e1b2-4af3-8c04-c8843905c279@stanley.mountain
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
[kwilczynski: commit log]
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Huang Cun <cunhuang@tencent.com>
Signed-off-by: Jianping Liu <frankjpliu@tencent.com>
This commit is contained in:
Dan Carpenter 2024-07-19 18:53:26 -05:00 committed by Jianping Liu
parent 3f277db193
commit 3dc9ffc730
1 changed files with 1 additions and 1 deletions
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2
drivers/pci/controller/dwc/pci-keystone.c
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@ -595,7 +595,7 @@ static void ks_pcie_quirk(struct pci_dev *dev)
*/
if (pci_match_id(am6_pci_devids, bridge)) {
bridge_dev = pci_get_host_bridge_device(dev);
if (!bridge_dev && !bridge_dev->parent)
if (!bridge_dev || !bridge_dev->parent)
return;
ks_pcie = dev_get_drvdata(bridge_dev->parent);