| 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-2022-49490: drm/msm/mdp5: Return error code in mdp5_pipe_release when deadlock is detected |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/msm/mdp5: Return error code in mdp5_pipe_release when deadlock is detected |
| |
| mdp5_get_global_state runs the risk of hitting a -EDEADLK when acquiring |
| the modeset lock, but currently mdp5_pipe_release doesn't check for if |
| an error is returned. Because of this, there is a possibility of |
| mdp5_pipe_release hitting a NULL dereference error. |
| |
| To avoid this, let's have mdp5_pipe_release check if |
| mdp5_get_global_state returns an error and propogate that error. |
| |
| Changes since v1: |
| - Separated declaration and initialization of *new_state to avoid |
| compiler warning |
| - Fixed some spelling mistakes in commit message |
| |
| Changes since v2: |
| - Return 0 in case where hwpipe is NULL as this is considered normal |
| behavior |
| - Added 2nd patch in series to fix a similar NULL dereference issue in |
| mdp5_mixer_release |
| |
| Patchwork: https://patchwork.freedesktop.org/patch/485179/ |
| |
| The Linux kernel CVE team has assigned CVE-2022-49490 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.18 with commit 7907a0d77cb461f58045763c205a5830be72e97c and fixed in 4.19.247 with commit 776f5c58bfe16cf322d71eeed3c5dda1eeac7e6b |
| Issue introduced in 4.18 with commit 7907a0d77cb461f58045763c205a5830be72e97c and fixed in 5.4.198 with commit b2aa2c4efe93e2580d6a8774b04fe2b99756a322 |
| Issue introduced in 4.18 with commit 7907a0d77cb461f58045763c205a5830be72e97c and fixed in 5.10.121 with commit 49dc28b4b2e28ef7564e355c91487996c1cbebd7 |
| Issue introduced in 4.18 with commit 7907a0d77cb461f58045763c205a5830be72e97c and fixed in 5.15.46 with commit 04bef5f1ba8ea6d7c1c8f5f65e0395c62db59cb8 |
| Issue introduced in 4.18 with commit 7907a0d77cb461f58045763c205a5830be72e97c and fixed in 5.17.14 with commit 19964dfb39bda4d7716a71009488f0668ecbcf52 |
| Issue introduced in 4.18 with commit 7907a0d77cb461f58045763c205a5830be72e97c and fixed in 5.18.3 with commit 33dc5aac46e0fad8f5eb193e5906ed0eb6b66ceb |
| Issue introduced in 4.18 with commit 7907a0d77cb461f58045763c205a5830be72e97c and fixed in 5.19 with commit d59be579fa932c46b908f37509f319cbd4ca9a68 |
| |
| 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-2022-49490 |
| 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/mdp5/mdp5_pipe.c |
| drivers/gpu/drm/msm/disp/mdp5/mdp5_pipe.h |
| drivers/gpu/drm/msm/disp/mdp5/mdp5_plane.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/776f5c58bfe16cf322d71eeed3c5dda1eeac7e6b |
| https://git.kernel.org/stable/c/b2aa2c4efe93e2580d6a8774b04fe2b99756a322 |
| https://git.kernel.org/stable/c/49dc28b4b2e28ef7564e355c91487996c1cbebd7 |
| https://git.kernel.org/stable/c/04bef5f1ba8ea6d7c1c8f5f65e0395c62db59cb8 |
| https://git.kernel.org/stable/c/19964dfb39bda4d7716a71009488f0668ecbcf52 |
| https://git.kernel.org/stable/c/33dc5aac46e0fad8f5eb193e5906ed0eb6b66ceb |
| https://git.kernel.org/stable/c/d59be579fa932c46b908f37509f319cbd4ca9a68 |
