Affected: Linux

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

perf/amlogic: Replace smp_processor_id() with raw_smp_processor_id() in meson_ddr_pmu_create()

The Amlogic DDR PMU driver meson_ddr_pmu_create() function incorrectly uses smp_processor_id(), which assumes disabled preemption. This leads to kernel warnings during module loading because meson_ddr_pmu_create() can be called in a preemptible context.

Following kernel warning and stack trace: [ 31.745138] [ T2289] BUG: using smp_processor_id() in preemptible [00000000] code: (udev-worker)/2289 [ 31.745154] [ T2289] caller is debug_smp_processor_id+0x28/0x38 [ 31.745172] [ T2289] CPU: 4 UID: 0 PID: 2289 Comm: (udev-worker) Tainted: GW 6.14.0-0-MANJARO-ARM #1 59519addcbca6ba8de735e151fd7b9e97aac7ff0 [ 31.745181] [ T2289] Tainted: [W]=WARN [ 31.745183] [ T2289] Hardware name: Hardkernel ODROID-N2Plus (DT) [ 31.745188] [ T2289] Call trace: [ 31.745191] [ T2289] show_stack+0x28/0x40 (C) [ 31.745199] [ T2289] dump_stack_lvl+0x4c/0x198 [ 31.745205] [ T2289] dump_stack+0x20/0x50 [ 31.745209] [ T2289] check_preemption_disabled+0xec/0xf0 [ 31.745213] [ T2289] debug_smp_processor_id+0x28/0x38 [ 31.745216] [ T2289] meson_ddr_pmu_create+0x200/0x560 [meson_ddr_pmu_g12 8095101c49676ad138d9961e3eddaee10acca7bd] [ 31.745237] [ T2289] g12_ddr_pmu_probe+0x20/0x38 [meson_ddr_pmu_g12 8095101c49676ad138d9961e3eddaee10acca7bd] [ 31.745246] [ T2289] platform_probe+0x98/0…