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Message-ID: <2024102145-CVE-2022-48973-a0e7@gregkh> Date: Mon, 21 Oct 2024 22:06:05 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Subject: CVE-2022-48973: gpio: amd8111: Fix PCI device reference count leak Description =========== 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(). The Linux kernel CVE team has assigned CVE-2022-48973 to this issue. Affected and fixed versions =========================== Issue introduced in 3.6 with commit f942a7de047d and fixed in 4.9.336 with commit 4749c5cc147c Issue introduced in 3.6 with commit f942a7de047d and fixed in 4.14.302 with commit 71d591ef873f Issue introduced in 3.6 with commit f942a7de047d and fixed in 4.19.269 with commit b2bc053ebbba Issue introduced in 3.6 with commit f942a7de047d and fixed in 5.4.227 with commit 48bd5d3801f6 Issue introduced in 3.6 with commit f942a7de047d and fixed in 5.10.159 with commit 5ee6413d3dd9 Issue introduced in 3.6 with commit f942a7de047d and fixed in 5.15.83 with commit 4271515f189b Issue introduced in 3.6 with commit f942a7de047d and fixed in 6.0.13 with commit e364ce04d8f8 Issue introduced in 3.6 with commit f942a7de047d and fixed in 6.1 with commit 45fecdb9f658 Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2022-48973 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: drivers/gpio/gpio-amd8111.c Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: 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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