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medium5.5

CVE-2022-48973

In the Linux kernel, the following vulnerability has been resolved: gpio: amd8111: Fix PCI device reference count leak for_each_pci_dev() is implemented by pci…

Impact

In the Linux kernel, the following vulnerability has been resolved: gpio: amd8111: Fix PCI device reference count leak for_each_pci_dev() is implemented by pci_get_device(). The comment of pci_get_device() says that it will increase the reference count for the returned pci_dev and also decrease the reference count for the input pci_dev @from if it is not NULL. If we break for_each_pci_dev() loop with pdev not NULL, we need to call pci_dev_put() to decrease the reference count. Add the missing pci_dev_put() after the 'out' label. Since pci_dev_put() can handle NULL input parameter, there is no problem for the 'Device not found' branch. For the normal path, add pci_dev_put() in amd_gpio_exit().

Affected products

VendorProductAffected versions
LinuxLinux Kernel
from 3.6 before 4.9.336
from 4.10 before 4.14.302
from 4.15 before 4.19.269
from 4.20 before 5.4.227
from 5.5 before 5.10.159
from 5.11 before 5.15.83

References