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Date: Sun, 28 Apr 2024 15:05:17 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Subject: CVE-2022-48656: dmaengine: ti: k3-udma-private: Fix refcount leak bug in of_xudma_dev_get() Description =========== In the Linux kernel, the following vulnerability has been resolved: dmaengine: ti: k3-udma-private: Fix refcount leak bug in of_xudma_dev_get() We should call of_node_put() for the reference returned by of_parse_phandle() in fail path or when it is not used anymore. Here we only need to move the of_node_put() before the check. The Linux kernel CVE team has assigned CVE-2022-48656 to this issue. Affected and fixed versions =========================== Issue introduced in 5.6 with commit d70241913413 and fixed in 5.10.146 with commit aa11dae059a4 Issue introduced in 5.6 with commit d70241913413 and fixed in 5.15.71 with commit dd5a6c5a0875 Issue introduced in 5.6 with commit d70241913413 and fixed in 5.19.12 with commit a17df55bf6d5 Issue introduced in 5.6 with commit d70241913413 and fixed in 6.0 with commit f9fdb0b86f08 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-2022-48656 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/dma/ti/k3-udma-private.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/aa11dae059a439af82bae541b134f8f53ac177b5 https://git.kernel.org/stable/c/dd5a6c5a08752b613e83ad2cb5133e72a64b876d https://git.kernel.org/stable/c/a17df55bf6d536712da6902a83db82b82e67d5a2 https://git.kernel.org/stable/c/f9fdb0b86f087c2b7f6c6168dd0985a3c1eda87e
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