| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2020-36782: i2c: imx-lpi2c: fix reference leak when pm_runtime_get_sync fails |
| |
| 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 13d6eb20fc79a1e606307256dad4098375539a09 and fixed in 5.4.119 with commit 815859cb1d2302e74f11bf6894bceace9ca9eb4a |
| Issue introduced in 4.16 with commit 13d6eb20fc79a1e606307256dad4098375539a09 and fixed in 5.10.37 with commit cc49d206414240483bb93ffa3d80243e6a776916 |
| Issue introduced in 4.16 with commit 13d6eb20fc79a1e606307256dad4098375539a09 and fixed in 5.11.21 with commit bb300acc867e937edc2a6898e92b21f88e4e4e66 |
| Issue introduced in 4.16 with commit 13d6eb20fc79a1e606307256dad4098375539a09 and fixed in 5.12.4 with commit b100650d80cd2292f6c152f5f2943b5944b3e8ce |
| Issue introduced in 4.16 with commit 13d6eb20fc79a1e606307256dad4098375539a09 and fixed in 5.13 with commit 278e5bbdb9a94fa063c0f9bcde2479d0b8042462 |
| |
| 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-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 |
