sched: Use CPUPRI_NR_PRIORITIES instead of MAX_RT_PRIO in cpupri check

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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
hit.

Reported-by: Mike Galbraith <umgwanakikbuti@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/1397015410.5212.13.camel@marge.simpson.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>

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Steven Rostedt (Red Hat) 2014-04-13 09:34:53 -04:00 • committed by Ingo Molnar

parent 6a7cd273dc

commit 6227cb00cc

1 changed files with 1 additions and 2 deletions

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kernel/sched/cpupri.c

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