Description
In the Linux kernel, the following vulnerability has been resolved: drivers/perf: hisi: use cpuhp_state_remove_instance_nocalls() for hisi_hns3_pmu uninit process When tearing down a 'hisi_hns3' PMU, we mistakenly run the CPU hotplug callbacks after the device has been unregistered, leading to fireworks when we try to execute empty function callbacks within the driver: | Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 | CPU: 0 PID: 15 Comm: cpuhp/0 Tainted: G W O 5.12.0-rc4+ #1 | Hardware name: , BIOS KpxxxFPGA 1P B600 V143 04/22/2021 | pstate: 80400009 (Nzcv daif +PAN -UAO -TCO BTYPE=--) | pc : perf_pmu_migrate_context+0x98/0x38c | lr : perf_pmu_migrate_context+0x94/0x38c | | Call trace: | perf_pmu_migrate_context+0x98/0x38c | hisi_hns3_pmu_offline_cpu+0x104/0x12c [hisi_hns3_pmu] Use cpuhp_state_remove_instance_nocalls() instead of cpuhp_state_remove_instance() so that the notifiers don't execute after the PMU device has been unregistered. [will: Rewrote commit message]
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
66637ab137b44914356a9dc7a9b3f8ebcf0b0695 to < 4589403a343bb0c72a6faf5898386ff964d4e01aaffected66637ab137b44914356a9dc7a9b3f8ebcf0b0695 to < 3f5827371763f2d9c70719c270055a81d030f3d0affected66637ab137b44914356a9dc7a9b3f8ebcf0b0695 to < d04ff5437a45f275db5530efb49b68d0ec851f6faffected66637ab137b44914356a9dc7a9b3f8ebcf0b0695 to < 50b560783f7f71790bcf70e9e9855155fb0af8c1affected
Linux Linux
Default version status: affected
6.0affected0 to < 6.0unaffected6.1.63 to ≤ 6.1.*unaffected6.5.12 to ≤ 6.5.*unaffected6.6.2 to ≤ 6.6.*unaffected6.7 to ≤ *unaffected