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

drm/amd/display: Add NULL check for clk_mgr in dcn32_init_hw

This commit addresses a potential null pointer dereference issue in the
dcn32_init_hw function. The issue could occur when dc->clk_mgr is
null.

The fix adds a check to ensure dc->clk_mgr is not null before
accessing its functions. This prevents a potential null pointer
dereference.

Reported by smatch:
drivers/gpu/drm/amd/amdgpu/../display/dc/hwss/dcn32/dcn32_hwseq.c:961 dcn32_init_hw() error: we previously assumed 'dc->clk_mgr' could be null (see line 782)

References

• https://nvd.nist.gov/vuln/detail/CVE-2024-49915
• https://git.kernel.org/stable/c/7d1854c86d02cea8f8a0c0ca05f4ab14292baf3d
• https://git.kernel.org/stable/c/c395fd47d1565bd67671f45cca281b3acc2c31ef
• https://git.kernel.org/stable/c/f0454b3cb0584a6bf275aeb49be61a760fd546a2