| 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-2022-49128: drm/bridge: Add missing pm_runtime_put_sync |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/bridge: Add missing pm_runtime_put_sync |
| |
| pm_runtime_get_sync() will increase the rumtime PM counter |
| even when it returns an error. Thus a pairing decrement is needed |
| to prevent refcount leak. Fix this by replacing this API with |
| pm_runtime_resume_and_get(), which will not change the runtime |
| PM counter on error. Besides, a matching decrement is needed |
| on the error handling path to keep the counter balanced. |
| |
| The Linux kernel CVE team has assigned CVE-2022-49128 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.8 with commit 44cfc6233447cb2cf47aeb99457de35826a363f6 and fixed in 5.15.34 with commit ff13c90d7f7ab606b37be6d15140d19013d6736c |
| Issue introduced in 5.8 with commit 44cfc6233447cb2cf47aeb99457de35826a363f6 and fixed in 5.16.20 with commit 792533e54cd6e89191798ccd1abd590c62b9077e |
| Issue introduced in 5.8 with commit 44cfc6233447cb2cf47aeb99457de35826a363f6 and fixed in 5.17.3 with commit 9df80dc738926a2ea4bd1ce5993c3d0f4b0e855c |
| Issue introduced in 5.8 with commit 44cfc6233447cb2cf47aeb99457de35826a363f6 and fixed in 5.18 with commit 46f47807738441e354873546dde0b000106c068a |
| |
| 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-2022-49128 |
| 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/gpu/drm/bridge/nwl-dsi.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/ff13c90d7f7ab606b37be6d15140d19013d6736c |
| https://git.kernel.org/stable/c/792533e54cd6e89191798ccd1abd590c62b9077e |
| https://git.kernel.org/stable/c/9df80dc738926a2ea4bd1ce5993c3d0f4b0e855c |
| https://git.kernel.org/stable/c/46f47807738441e354873546dde0b000106c068a |
