From a8731264e5ce083eb761e5a6a8273db536743e9e Mon Sep 17 00:00:00 2001 From: Mark Rutland Date: Tue, 8 Nov 2022 09:37:25 +0000 Subject: arm_pmu: acpi: handle allocation failure One of the failure paths in the arm_pmu ACPI code is missing an early return, permitting a NULL pointer dereference upon a memory allocation failure. Add the missing return. Fixes: fe40ffdb7656 ("arm_pmu: rework ACPI probing") Signed-off-by: Mark Rutland Reported-by: Will Deacon Link: https://lore.kernel.org/r/20221108093725.1239563-1-mark.rutland@arm.com Signed-off-by: Will Deacon --- drivers/perf/arm_pmu_acpi.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/perf') diff --git a/drivers/perf/arm_pmu_acpi.c b/drivers/perf/arm_pmu_acpi.c index a085e45b509e..90815ad762eb 100644 --- a/drivers/perf/arm_pmu_acpi.c +++ b/drivers/perf/arm_pmu_acpi.c @@ -333,6 +333,7 @@ int arm_pmu_acpi_probe(armpmu_init_fn init_fn) if (!pmu) { pr_warn("Unable to allocate PMU for CPU%d\n", cpu); + return -ENOMEM; } cpuid = per_cpu(cpu_data, cpu).reg_midr; -- cgit v1.2.3