Description

In the Linux kernel, the following vulnerability has been resolved: perf/arm_dmc620: Fix hotplug callback leak in dmc620_pmu_init() dmc620_pmu_init() won't remove the callback added by cpuhp_setup_state_multi() when platform_driver_register() failed. Remove the callback by cpuhp_remove_multi_state() in fail path. Similar to the handling of arm_ccn_init() in commit 26242b330093 ("bus: arm-ccn: Prevent hotplug callback leak")

References 4

• git.kernel.org https://git.kernel.org/stable/c/adf7c3bbcc819db6e95b6a61c9822230f0ef4778
• git.kernel.org https://git.kernel.org/stable/c/af170afa97e50d4169cfaa7ff4ec5d3841182641
• git.kernel.org https://git.kernel.org/stable/c/b99fbe8d949a99fe456f08c7aad421327685aa50
• git.kernel.org https://git.kernel.org/stable/c/d9f564c966e63925aac4ba273a9319d7fb6f4b4e

Remediation