NULL Pointer Dereference Affecting kernel-syms package, versions <6.4.0-150600.23.25.1

Note: Versions mentioned in the description apply only to the upstream kernel-syms package and not the kernel-syms package as distributed by SLES. See How to fix? for SLES:15.6 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

drm/amd/display: Add null checks for 'stream' and 'plane' before dereferencing

This commit adds null checks for the 'stream' and 'plane' variables in the dcn30_apply_idle_power_optimizations function. These variables were previously assumed to be null at line 922, but they were used later in the code without checking if they were null. This could potentially lead to a null pointer dereference, which would cause a crash.

The null checks ensure that 'stream' and 'plane' are not null before they are used, preventing potential crashes.

Fixes the below static smatch checker: drivers/gpu/drm/amd/amdgpu/../display/dc/hwss/dcn30/dcn30_hwseq.c:938 dcn30_apply_idle_power_optimizations() error: we previously assumed 'stream' could be null (see line 922) drivers/gpu/drm/amd/amdgpu/../display/dc/hwss/dcn30/dcn30_hwseq.c:940 dcn30_apply_idle_power_optimizations() error: we previously assumed 'plane' could be null (see line 922)

• https://www.suse.com/security/cve/CVE-2024-43904.html
• https://bugzilla.suse.com/1229768
• https://git.kernel.org/stable/c/15c2990e0f0108b9c3752d7072a97d45d4283aea
• https://git.kernel.org/stable/c/16a8a2a839d19c4cf7253642b493ffb8eee1d857