| 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-2022-49221: drm/msm/dp: populate connector of struct dp_panel |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/msm/dp: populate connector of struct dp_panel |
| |
| DP CTS test case 4.2.2.6 has valid edid with bad checksum on purpose |
| and expect DP source return correct checksum. During drm edid read, |
| correct edid checksum is calculated and stored at |
| connector::real_edid_checksum. |
| |
| The problem is struct dp_panel::connector never be assigned, instead the |
| connector is stored in struct msm_dp::connector. When we run compliance |
| testing test case 4.2.2.6 dp_panel_handle_sink_request() won't have a valid |
| edid set in struct dp_panel::edid so we'll try to use the connectors |
| real_edid_checksum and hit a NULL pointer dereference error because the |
| connector pointer is never assigned. |
| |
| Changes in V2: |
| -- populate panel connector at msm_dp_modeset_init() instead of at dp_panel_read_sink_caps() |
| |
| Changes in V3: |
| -- remove unhelpful kernel crash trace commit text |
| -- remove renaming dp_display parameter to dp |
| |
| Changes in V4: |
| -- add more details to commit text |
| |
| Changes in v10: |
| -- group into one series |
| |
| Changes in v11: |
| -- drop drm/msm/dp: dp_link_parse_sink_count() return immediately if aux read |
| |
| Signee-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com> |
| |
| The Linux kernel CVE team has assigned CVE-2022-49221 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.10.67 with commit f86bc4a1a401d3691bad41e67f9db0c2ea94da32 and fixed in 5.10.110 with commit 413c62697b61226a236c8b1f5cd64dcf42bcc12f |
| Issue introduced in 5.15 with commit 7948fe12d47a946fb8025a0534c900e3dd4b5839 and fixed in 5.15.33 with commit 9525b8bcae8b99188990b56484799cf4b1b43786 |
| Issue introduced in 5.15 with commit 7948fe12d47a946fb8025a0534c900e3dd4b5839 and fixed in 5.16.19 with commit fbba600f432a360b42452fee79d1fb35d3aa8aeb |
| Issue introduced in 5.15 with commit 7948fe12d47a946fb8025a0534c900e3dd4b5839 and fixed in 5.17.2 with commit 104074ebc0c3f358dd1ee944fbcde92c6e5a21dd |
| Issue introduced in 5.15 with commit 7948fe12d47a946fb8025a0534c900e3dd4b5839 and fixed in 5.18 with commit 5e602f5156910c7b19661699896cb6e3fb94fab9 |
| Issue introduced in 5.13.19 with commit ab1ccd1e2584b268784518f838f7cc72faec576b |
| Issue introduced in 5.14.6 with commit 08a96864a45b65ee406a344c78dd761b2fd66887 |
| |
| 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-2022-49221 |
| 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/dp/dp_display.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/413c62697b61226a236c8b1f5cd64dcf42bcc12f |
| https://git.kernel.org/stable/c/9525b8bcae8b99188990b56484799cf4b1b43786 |
| https://git.kernel.org/stable/c/fbba600f432a360b42452fee79d1fb35d3aa8aeb |
| https://git.kernel.org/stable/c/104074ebc0c3f358dd1ee944fbcde92c6e5a21dd |
| https://git.kernel.org/stable/c/5e602f5156910c7b19661699896cb6e3fb94fab9 |
