cpuacct: Convert BUG_ON() to WARN_ON_ONCE()
Replace fatal BUG_ON() with more safe WARN_ON_ONCE() in cpuacct_cpuusage_read().
Signed-off-by: Andrey Ryabinin <arbn@yandex-team.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20211115164607.23784-2-arbn@yandex-team.com
diff --git a/kernel/sched/cpuacct.c b/kernel/sched/cpuacct.c
index 893eece..f347cf9 100644
--- a/kernel/sched/cpuacct.c
+++ b/kernel/sched/cpuacct.c
@@ -106,7 +106,8 @@ static u64 cpuacct_cpuusage_read(struct cpuacct *ca, int cpu,
* We allow index == CPUACCT_STAT_NSTATS here to read
* the sum of usages.
*/
- BUG_ON(index > CPUACCT_STAT_NSTATS);
+ if (WARN_ON_ONCE(index > CPUACCT_STAT_NSTATS))
+ return 0;
#ifndef CONFIG_64BIT
/*
