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sched/eevdf: Fix heap corruption more

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Because someone is a flaming idiot... and forgot we have current as
se->on_rq but not actually in the tree itself, and walking rb_parent()
on an entry not in the tree is 'funky' and KASAN complains.

Fixes: 8dafa9d0eb1a ("sched/eevdf: Fix min_deadline heap integrity")
Reported-by: 0599jiangyc@gmail.com
Reported-by: Dmitry Safonov <0x7f454c46@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Dmitry Safonov <0x7f454c46@gmail.com>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=218020
Link: https://lkml.kernel.org/r/CAJwJo6ZGXO07%3DQvW4fgQfbsDzQPs9xj5sAQ1zp%3DmAyPMNbHYww%40mail.gmail.com
This commit is contained in:
Peter Zijlstra 2023-10-17 16:59:47 +02:00
parent 58720809f5
commit d2929762cc
1 changed files with 2 additions and 1 deletions
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3
kernel/sched/fair.c
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@ -3657,7 +3657,8 @@ static void reweight_entity(struct cfs_rq *cfs_rq, struct sched_entity *se,
*/
deadline = div_s64(deadline * old_weight, weight);
se->deadline = se->vruntime + deadline;
min_deadline_cb_propagate(&se->run_node, NULL);
if (se != cfs_rq->curr)
min_deadline_cb_propagate(&se->run_node, NULL);
}
#ifdef CONFIG_SMP