CVE-2024-47720

/// Technical description

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

drm/amd/display: Add null check for set_output_gamma in dcn30_set_output_transfer_func

This commit adds a null check for the set_output_gamma function pointer

in the dcn30_set_output_transfer_func function. Previously,

set_output_gamma was being checked for nullity at line 386, but then it

was being dereferenced without any nullity check at line 401. This

could potentially lead to a null pointer dereference error if

set_output_gamma is indeed null.

To fix this, we now ensure that set_output_gamma is not null before

dereferencing it. We do this by adding a nullity check for

set_output_gamma before the call to set_output_gamma at line 401. If

set_output_gamma is null, we log an error message and do not call the

function.

This fix prevents a potential null pointer dereference error.

drivers/gpu/drm/amd/amdgpu/../display/dc/hwss/dcn30/dcn30_hwseq.c:401 dcn30_set_output_transfer_func()

error: we previously assumed 'mp

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References