linux-kernel - Re: [syzbot] [audit?] [bpf?] INFO: rcu detected stall in kauditd

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Date: Fri, 29 Mar 2024 07:27:37 +0800
From: Hillf Danton <hdanton@...a.com>
To: syzbot <syzbot+81f5ca46b043d4a1b789@...kaller.appspotmail.com>
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [audit?] [bpf?] INFO: rcu detected stall in kauditd_thread (4)

On Wed, 27 Mar 2024 11:39:42 -0700
> syzbot found the following issue on:
> 
> HEAD commit:    fe46a7dd189e Merge tag 'sound-6.9-rc1' of git://git.kernel..
> git tree:       upstream
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=112840ee180000

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git  master

--- x/net/sched/sch_taprio.c
+++ y/net/sched/sch_taprio.c
@@ -980,7 +980,7 @@ first_run:
 	rcu_assign_pointer(q->current_entry, next);
 	spin_unlock(&q->current_entry_lock);
 
-	hrtimer_set_expires(&q->advance_timer, end_time);
+	hrtimer_forward_now(&q->advance_timer, ns_to_ktime(NSEC_PER_USEC *200));
 
 	rcu_read_lock();
 	__netif_schedule(sch);
--