| 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-2022-49485: drm/v3d: Fix null pointer dereference of pointer perfmon |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/v3d: Fix null pointer dereference of pointer perfmon |
| |
| In the unlikely event that pointer perfmon is null the WARN_ON return path |
| occurs after the pointer has already been deferenced. Fix this by only |
| dereferencing perfmon after it has been null checked. |
| |
| The Linux kernel CVE team has assigned CVE-2022-49485 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.15 with commit 26a4dc29b74a137f45665089f6d3d633fcc9b662 and fixed in 5.15.46 with commit 4be045434923e549a50846a066a04b7b6c1d6d33 |
| Issue introduced in 5.15 with commit 26a4dc29b74a137f45665089f6d3d633fcc9b662 and fixed in 5.17.14 with commit 1df8f8901babcc8c8eea2c067179e455b5c828fd |
| Issue introduced in 5.15 with commit 26a4dc29b74a137f45665089f6d3d633fcc9b662 and fixed in 5.18.3 with commit 3b72deb784a7d4ae8519a5c584cd87c4b57aa6c8 |
| Issue introduced in 5.15 with commit 26a4dc29b74a137f45665089f6d3d633fcc9b662 and fixed in 5.19 with commit ce7a1ecf3f9f1fccaf67295307614511d8e11b13 |
| |
| 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-2022-49485 |
| 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/v3d/v3d_perfmon.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/4be045434923e549a50846a066a04b7b6c1d6d33 |
| https://git.kernel.org/stable/c/1df8f8901babcc8c8eea2c067179e455b5c828fd |
| https://git.kernel.org/stable/c/3b72deb784a7d4ae8519a5c584cd87c4b57aa6c8 |
| https://git.kernel.org/stable/c/ce7a1ecf3f9f1fccaf67295307614511d8e11b13 |
