percpu: off by one in BUG_ON()

The unit_map[] array has "nr_cpu_ids" number of elements. It's allocated a few lines earlier in the function. So this test should be >= instead of >. Signed-off-by: Dan Carpenter <[email protected]> Signed-off-by: Tejun Heo <[email protected]>
ambv · Oct 29, 2014 · 9f29566 · 9f29566
1 parent cac7f24
commit 9f29566
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/mm/percpu.c b/mm/percpu.c
@@ -1591,7 +1591,7 @@ int __init pcpu_setup_first_chunk(const struct pcpu_alloc_info *ai,
 			if (cpu == NR_CPUS)
 				continue;
 
-			PCPU_SETUP_BUG_ON(cpu > nr_cpu_ids);
+			PCPU_SETUP_BUG_ON(cpu >= nr_cpu_ids);
 			PCPU_SETUP_BUG_ON(!cpu_possible(cpu));
 			PCPU_SETUP_BUG_ON(unit_map[cpu] != UINT_MAX);