We should never have a cpuid greater that NR_CPUS. Compare with NR_CPUS before creating the mapping between logical and physical CPU ids. This is also mandatory as NR_CPUS check is removed from riscv_of_processor_hartid.
Signed-off-by: Atish Patra <[email protected]> --- arch/riscv/kernel/smpboot.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/riscv/kernel/smpboot.c b/arch/riscv/kernel/smpboot.c index 32e14572..7954470b 100644 --- a/arch/riscv/kernel/smpboot.c +++ b/arch/riscv/kernel/smpboot.c @@ -69,6 +69,11 @@ void __init setup_smp(void) of_node_put(dn); continue; } + if (cpuid >= NR_CPUS) { + pr_warn("Invalid cpuid [%d] for hartid [%d]\n", + cpuid, hart); + break; + } cpuid_to_hartid_map(cpuid) = hart; set_cpu_possible(cpuid, true); -- 2.7.4
