| 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-2023-52586: drm/msm/dpu: Add mutex lock in control vblank irq |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/msm/dpu: Add mutex lock in control vblank irq |
| |
| Add a mutex lock to control vblank irq to synchronize vblank |
| enable/disable operations happening from different threads to prevent |
| race conditions while registering/unregistering the vblank irq callback. |
| |
| v4: -Removed vblank_ctl_lock from dpu_encoder_virt, so it is only a |
| parameter of dpu_encoder_phys. |
| -Switch from atomic refcnt to a simple int counter as mutex has |
| now been added |
| v3: Mistakenly did not change wording in last version. It is done now. |
| v2: Slightly changed wording of commit message |
| |
| Patchwork: https://patchwork.freedesktop.org/patch/571854/ |
| |
| The Linux kernel CVE team has assigned CVE-2023-52586 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.19 with commit 25fdd5933e4c0f5fe2ea5cd59994f8ac5fbe90ef and fixed in 6.7.4 with commit 14f109bf74dd67e1d0469fed859c8e506b0df53f |
| Issue introduced in 4.19 with commit 25fdd5933e4c0f5fe2ea5cd59994f8ac5fbe90ef and fixed in 6.8 with commit 45284ff733e4caf6c118aae5131eb7e7cf3eea5a |
| |
| 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-2023-52586 |
| 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/disp/dpu1/dpu_encoder.c |
| drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h |
| drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c |
| drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.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/14f109bf74dd67e1d0469fed859c8e506b0df53f |
| https://git.kernel.org/stable/c/45284ff733e4caf6c118aae5131eb7e7cf3eea5a |
