Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix NULL pointer dereference in dcn401_init_hw() dcn401_init_hw() assumes that update_bw_bounding_box() is valid when entering the update path. However, the existing condition: ((!fams2_enable && update_bw_bounding_box) || freq_changed) does not guarantee this, as the freq_changed branch can evaluate to true independently of the callback pointer. This can result in calling update_bw_bounding_box() when it is NULL. Fix this by separating the update condition from the pointer checks and ensuring the callback, dc->clk_mgr, and bw_params are validated before use. Fixes the below: ../dc/hwss/dcn401/dcn401_hwseq.c:367 dcn401_init_hw() error: we previously assumed 'dc->res_pool->funcs->update_bw_bounding_box' could be null (see line 362) (cherry picked from commit 86117c5ab42f21562fedb0a64bffea3ee5fcd477)
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected ca0fb243c3bb53dbbd71d16c76f319bf923ee3d4 before fcc51c81cb472eb460310c477460356dc4845ff7; affected ca0fb243c3bb53dbbd71d16c76f319bf923ee3d4 before 10c13c111d0d7f8e101c742feff264fc98e3f9f7; affected ca0fb243c3bb53dbbd71d16c76f319bf923ee3d4 before 2d4a6f0702c5211e0be8b688c5fc24f082ec74d6; affected ca0fb243c3bb53dbbd71d16c76f319bf923ee3d4 before e927b36ae18b66b49219eaa9f46edc7b4fdbb25e; affected e13689793b9c0e7b5749954e77f5f85e68fe7138; affected 6.11.3 before 6.12 |
| Linux / Linux | affected 6.12; unaffected 0 before 6.12; unaffected 6.12.114 through 6.12.*; unaffected 6.18.22 through 6.18.*; unaffected 6.19.12 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.