CVE-2022-48973: gpio: amd8111: Fix PCI device reference count leak
First published: Mon Oct 21 2024(Updated: )
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().
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | >=3.6<4.9.336 | |
| Linux Linux kernel | >=4.10<4.14.302 | |
| Linux Linux kernel | >=4.15<4.19.269 | |
| Linux Linux kernel | >=4.20<5.4.227 | |
| Linux Linux kernel | >=5.5<5.10.159 | |
| Linux Linux kernel | >=5.11<5.15.83 | |
| Linux Linux kernel | >=5.16<6.0.13 | |
| Linux Linux kernel | =6.1-rc1 | |
| Linux Linux kernel | =6.1-rc2 | |
| Linux Linux kernel | =6.1-rc3 | |
| Linux Linux kernel | =6.1-rc4 | |
| Linux Linux kernel | =6.1-rc5 | |
| Linux Linux kernel | =6.1-rc6 | |
| Linux Linux kernel | =6.1-rc7 | |
| Linux Linux kernel | =6.1-rc8 |
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Reference Links
- https://git.kernel.org/stable/c/4749c5cc147c9860b96db1e71cc36d1de1bd3f59
- https://git.kernel.org/stable/c/71d591ef873f9ebb86cd8d053b3caee785b2de6a
- https://git.kernel.org/stable/c/b2bc053ebbba57a06fa655db5ea796de2edce445
- https://git.kernel.org/stable/c/48bd5d3801f6b67cc144449d434abbd5043a6d37
- https://git.kernel.org/stable/c/5ee6413d3dd972930af787b2c0c7aaeb379fa521
- https://git.kernel.org/stable/c/4271515f189bd5fe2ec86b4089dab7cb804625d2
- https://git.kernel.org/stable/c/e364ce04d8f840478b09eee57b614de7cf1e743e
- https://git.kernel.org/stable/c/45fecdb9f658d9c82960c98240bc0770ade19aca
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