CVE Published: 03/04/2024 |
CVE Updated: 05/11/2024 |
CVE Year: 2024 Source: Linux |
Vendor: Linux |
Product: Linux Status : PUBLISHED
CVE-2024-26729 Description
In the Linux kernel, the following vulnerability has been resolved:
drm/amd/display: Fix potential null pointer dereference in dc_dmub_srv
Fixes potential null pointer dereference warnings in the
dc_dmub_srv_cmd_list_queue_execute() and dc_dmub_srv_is_hw_pwr_up()
functions.
In both functions, the \'dc_dmub_srv\' variable was being dereferenced
before it was checked for null. This could lead to a null pointer
dereference if \'dc_dmub_srv\' is null. The fix is to check if
\'dc_dmub_srv\' is null before dereferencing it.
Thus moving the null checks for \'dc_dmub_srv\' to the beginning of the
functions to ensure that \'dc_dmub_srv\' is not null when it is
dereferenced.
Found by smatch & thus fixing the below:
drivers/gpu/drm/amd/amdgpu/../display/dc/dc_dmub_srv.c:133 dc_dmub_srv_cmd_list_queue_execute() warn: variable dereferenced before check \'dc_dmub_srv\' (see line 128)
drivers/gpu/drm/amd/amdgpu/../display/dc/dc_dmub_srv.c:1167 dc_dmub_srv_is_hw_pwr_up() warn: variable dereferenced before check \'dc_dmub_srv\' (see line 1164)