Commit 6227cb00 authored by Steven Rostedt (Red Hat)'s avatar Steven Rostedt (Red Hat) Committed by Ingo Molnar

sched: Use CPUPRI_NR_PRIORITIES instead of MAX_RT_PRIO in cpupri check

The check at the beginning of cpupri_find() makes sure that the task_pri
variable does not exceed the cp->pri_to_cpu array length. But that length
is CPUPRI_NR_PRIORITIES not MAX_RT_PRIO, where it will miss the last two
priorities in that array.

As task_pri is computed from convert_prio() which should never be bigger
than CPUPRI_NR_PRIORITIES, if the check should cause a panic if it is
Reported-by: default avatarMike Galbraith <>
Signed-off-by: default avatarSteven Rostedt <>
Signed-off-by: default avatarPeter Zijlstra <>
Link: default avatarIngo Molnar <>
parent 6a7cd273
......@@ -70,8 +70,7 @@ int cpupri_find(struct cpupri *cp, struct task_struct *p,
int idx = 0;
int task_pri = convert_prio(p->prio);
if (task_pri >= MAX_RT_PRIO)
return 0;
for (idx = 0; idx < task_pri; idx++) {
struct cpupri_vec *vec = &cp->pri_to_cpu[idx];
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