perf: arm-ni: Unregister PMUs on probe failure

Summary

In the Linux kernel, the following vulnerability has been resolved: perf: arm-ni: Unregister PMUs on probe failure When a resource allocation fails in one clock domain of an NI device, we need to properly roll back all previously registered perf PMUs in other clock domains of the same device. Otherwise, it can lead to kernel panics. Calling arm_ni_init+0x0/0xff8 [arm_ni] @ 2374 arm-ni ARMHCB70:00: Failed to request PMU region 0x1f3c13000 arm-ni ARMHCB70:00: probe with driver arm-ni failed with error -16 list_add corruption: next->prev should be prev (fffffd01e9698a18), but was 0000000000000000. (next=ffff10001a0decc8). pstate: 6340009 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : list_add_valid_or_report+0x7c/0xb8 lr : list_add_valid_or_report+0x7c/0xb8 Call trace: __list_add_valid_or_report+0x7c/0xb8 perf_pmu_register+0x22c/0x3a0 arm_ni_probe+0x554/0x70c [arm_ni] platform_probe+0x70/0xe8 really_probe+0xc6/0x4d8 driver_probe_device+0x48/0x170 __driver_attach+0x8e/0x1c0 bus_for_each_dev+0x64/0xf0 driver_add+0x138/0x260 bus_add_driver+0x68/0x138 __platform_driver_register+0x2c/0x40 arm_ni_init+0x14/0x2a [arm_ni] do_init_module+0x36/0x298 ---[ end trace 0000000000000000 ]--- Kernel panic - not syncing: Oops - BUG: Fatal exception SMP: stopping secondary CPUs

Timeline

1. Jul 3, 2025, 8:36 AM UTCCVE published
2. Oct 15, 2026, 9:48 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: total

3. Oct 15, 2026, 9:52 PM UTCRecord last updated

Affected versions

• Linux Linux

  From 4d5a7680f2b4d0c2955e1d9f9a594b050d637436 · fixed in 7e958e116e3be05a1f869b5a885fc5d674c7725f; From 4d5a7680f2b4d0c2955e1d9f9a594b050d637436 · fixed in 72caf9886e9c1731cf7bfe3eabc308b9268b21d6; From 4d5a7680f2b4d0c2955e1d9f9a594b050d637436 · fixed in 7f57afde6a44d9e044885e1125034edd4fda02e8

• Linux Linux

  6.12

• KernelLinux

  From 6.12.0 · fixed in 6.12.34; From 6.13.0 · fixed in 6.15.3

References 3