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CVE-2026-98779

drm/amdgpu: fix ACP MFD device leak on init failure PUBLISHED

Description (CNA)

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix ACP MFD device leak on init failure acp_hw_init() registers ACP child devices with mfd_add_devices() before attaching them to the ACP power domain and initializing the hardware. If attaching a child to the power domain fails, or if the ACP reset or clock enable operation times out, the failure path frees only the source cell, resource, and platform-data allocations. The child platform devices already registered by mfd_add_devices() remain registered and are never released. Remove the children from the power domain and unregister the MFD devices on failures that occur after mfd_add_devices() succeeds. Keep mfd_add_devices() failures on the existing cleanup path since the MFD core already rolls back partially registered children itself. The issue was identified by a static analysis tool I developed and confirmed by manual review. (cherry picked from commit 63da68d6a2279ec945581c990c5a59a5ae8b5560)

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected 25030321ba2860c56651429a4f28d94a6483d952 before d700c26ed64bd3c26e4aa7679b9d5f3333c3747a; affected 25030321ba2860c56651429a4f28d94a6483d952 before 2b9a53940a2bc063ea4cd09ee49220a503a0170c; affected 25030321ba2860c56651429a4f28d94a6483d952 before 587469076e4ffb617f7ad1a0c4a13072a3e87113; affected 25030321ba2860c56651429a4f28d94a6483d952 before abf854513bc19e6e24d45353ac99ec5627ee0acc; affected 25030321ba2860c56651429a4f28d94a6483d952 before f0013046151b7467e62c471c1c83d63ea255799c
Linux / Linuxaffected 4.6; unaffected 0 before 4.6; unaffected 6.6.160 through 6.6.*; unaffected 6.12.113 through 6.12.*; unaffected 6.18.56 through 6.18.*; unaffected 7.2.10 through 7.2.*; unaffected 7.3 through *

CWE

No CWE identifiers supplied.

References