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Message-ID: <2024022820-CVE-2020-36782-e7d8@gregkh> Date: Wed, 28 Feb 2024 09:14:20 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: gregkh@...nel.org Subject: CVE-2020-36782: i2c: imx-lpi2c: fix reference leak when pm_runtime_get_sync fails From: gregkh@...nel.org Description =========== In the Linux kernel, the following vulnerability has been resolved: i2c: imx-lpi2c: fix reference leak when pm_runtime_get_sync fails The PM reference count is not expected to be incremented on return in lpi2c_imx_master_enable. However, pm_runtime_get_sync will increment the PM reference count even failed. Forgetting to putting operation will result in a reference leak here. Replace it with pm_runtime_resume_and_get to keep usage counter balanced. The Linux kernel CVE team has assigned CVE-2020-36782 to this issue. Affected and fixed versions =========================== Issue introduced in 4.16 with commit 13d6eb20fc79 and fixed in 5.4.119 with commit 815859cb1d23 Issue introduced in 4.16 with commit 13d6eb20fc79 and fixed in 5.10.37 with commit cc49d2064142 Issue introduced in 4.16 with commit 13d6eb20fc79 and fixed in 5.11.21 with commit bb300acc867e Issue introduced in 4.16 with commit 13d6eb20fc79 and fixed in 5.12.4 with commit b100650d80cd Issue introduced in 4.16 with commit 13d6eb20fc79 and fixed in 5.13 with commit 278e5bbdb9a9 Please see https://www.kernel.org or 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-2020-36782 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/i2c/busses/i2c-imx-lpi2c.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/815859cb1d2302e74f11bf6894bceace9ca9eb4a https://git.kernel.org/stable/c/cc49d206414240483bb93ffa3d80243e6a776916 https://git.kernel.org/stable/c/bb300acc867e937edc2a6898e92b21f88e4e4e66 https://git.kernel.org/stable/c/b100650d80cd2292f6c152f5f2943b5944b3e8ce https://git.kernel.org/stable/c/278e5bbdb9a94fa063c0f9bcde2479d0b8042462
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