| 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-2022-49462: drm/msm/a6xx: Fix refcount leak in a6xx_gpu_init |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/msm/a6xx: Fix refcount leak in a6xx_gpu_init |
| |
| of_parse_phandle() returns a node pointer with refcount |
| incremented, we should use of_node_put() on it when not need anymore. |
| |
| a6xx_gmu_init() passes the node to of_find_device_by_node() |
| and of_dma_configure(), of_find_device_by_node() will takes its |
| reference, of_dma_configure() doesn't need the node after usage. |
| |
| Add missing of_node_put() to avoid refcount leak. |
| |
| The Linux kernel CVE team has assigned CVE-2022-49462 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.19 with commit 4b565ca5a2cbbbb6345e8789da89c193b6b00e5a and fixed in 5.4.198 with commit 6832e36f156ea35a6ed74bca72727806116effdd |
| Issue introduced in 4.19 with commit 4b565ca5a2cbbbb6345e8789da89c193b6b00e5a and fixed in 5.10.121 with commit 48e82ce8cdb19c20a5020fa446b286d6a147450c |
| Issue introduced in 4.19 with commit 4b565ca5a2cbbbb6345e8789da89c193b6b00e5a and fixed in 5.15.46 with commit edff4c1af831d0c02e654eed9da7d74174de49d5 |
| Issue introduced in 4.19 with commit 4b565ca5a2cbbbb6345e8789da89c193b6b00e5a and fixed in 5.17.14 with commit 65ddbc0d26824e2a5d6154d01d8cf39344900213 |
| Issue introduced in 4.19 with commit 4b565ca5a2cbbbb6345e8789da89c193b6b00e5a and fixed in 5.18.3 with commit 06907a374f1b74f8f2fb30720dc6df81331e4fb5 |
| Issue introduced in 4.19 with commit 4b565ca5a2cbbbb6345e8789da89c193b6b00e5a and fixed in 5.19 with commit c56de483093d7ad0782327f95dda7da97bc4c315 |
| |
| 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-2022-49462 |
| 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/msm/adreno/a6xx_gpu.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/6832e36f156ea35a6ed74bca72727806116effdd |
| https://git.kernel.org/stable/c/48e82ce8cdb19c20a5020fa446b286d6a147450c |
| https://git.kernel.org/stable/c/edff4c1af831d0c02e654eed9da7d74174de49d5 |
| https://git.kernel.org/stable/c/65ddbc0d26824e2a5d6154d01d8cf39344900213 |
| https://git.kernel.org/stable/c/06907a374f1b74f8f2fb30720dc6df81331e4fb5 |
| https://git.kernel.org/stable/c/c56de483093d7ad0782327f95dda7da97bc4c315 |
