CVE-2022-49002
Description
In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Fix PCI device refcount leak in dmar_dev_scope_init() 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() for the error path to avoid reference count leak.
How to fix
- linux linux_kernel4.9.335, 4.14.301, 4.19.268, 5.4.226, 5.10.158, 5.15.82, 6.0.12 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 3.15 ≤ v < 4.9.335, 4.10 ≤ v < 4.14.301, 4.15 ≤ v < 4.19.268, 4.20 ≤ v < 5.4.226, 5.5 ≤ v < 5.10.158, 5.11 ≤ v < 5.15.82, 5.16 ≤ v < 6.0.12, 6.1 | 4.9.335, 4.14.301, 4.19.268, 5.4.226, 5.10.158, 5.15.82, 6.0.12 |
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