| From bippy-1.2.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2024-26647: drm/amd/display: Fix late derefrence 'dsc' check in 'link_set_dsc_pps_packet()' |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/amd/display: Fix late derefrence 'dsc' check in 'link_set_dsc_pps_packet()' |
| |
| In link_set_dsc_pps_packet(), 'struct display_stream_compressor *dsc' |
| was dereferenced in a DC_LOGGER_INIT(dsc->ctx->logger); before the 'dsc' |
| NULL pointer check. |
| |
| Fixes the below: |
| drivers/gpu/drm/amd/amdgpu/../display/dc/link/link_dpms.c:905 link_set_dsc_pps_packet() warn: variable dereferenced before check 'dsc' (see line 903) |
| |
| The Linux kernel CVE team has assigned CVE-2024-26647 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.3 with commit 6ca7415f11af5200ab10bd420b513f846e9bfb99 and fixed in 6.6.15 with commit 6aa5ede6665122f4c8abce3c6eba06b49e54d25c |
| Issue introduced in 6.3 with commit 6ca7415f11af5200ab10bd420b513f846e9bfb99 and fixed in 6.7.3 with commit cf656fc7276e5b3709a81bc9d9639459be2b2647 |
| Issue introduced in 6.3 with commit 6ca7415f11af5200ab10bd420b513f846e9bfb99 and fixed in 6.8 with commit 3bb9b1f958c3d986ed90a3ff009f1e77e9553207 |
| |
| 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-2024-26647 |
| 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/amd/display/dc/link/link_dpms.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/6aa5ede6665122f4c8abce3c6eba06b49e54d25c |
| https://git.kernel.org/stable/c/cf656fc7276e5b3709a81bc9d9639459be2b2647 |
| https://git.kernel.org/stable/c/3bb9b1f958c3d986ed90a3ff009f1e77e9553207 |
