syzbot has bisected this issue to:

commit dfa0a574cbc47bfd5f8985f74c8ea003a37fa078
Author: Peter Zijlstra [off-list ref]
Date:   Wed Jun 5 10:09:11 2024 +0000

    sched/uclamg: Handle delayed dequeue

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=13c2d7d0580000
start commit:   e32cde8d2bd7 Merge tag 'sched_ext-for-6.12-rc1-fixes-1' of..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=1022d7d0580000
console output: https://syzkaller.appspot.com/x/log.txt?x=17c2d7d0580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=286b31f2cf1c36b5
dashboard link: https://syzkaller.appspot.com/bug?extid=7da6c19dc528c2ebc612
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=146ae580580000

Reported-by: syzbot+7da6c19dc528c2ebc612@syzkaller.appspotmail.com
Fixes: dfa0a574cbc4 ("sched/uclamg: Handle delayed dequeue")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection