rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=cebc/1/0x4000000000000000 softirq=264039/264044 fqs=4770
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1037559          0            0
rcu: 	cputime:    34353      18136           87   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=231053 q=10044 ncpus=2)
CPU: 1 UID: 0 PID: 22840 Comm: syz.5.16127 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:check_preemption_disabled+0x1/0xe0
Code: a0 c9 27 8c 48 c7 c6 e0 c9 27 8c eb 1c 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 <41> 57 41 56 53 65 8b 05 57 73 6d 07 65 8b 0d 4c 73 6d 07 f7 c1 ff
RSP: 0018:ffffc90000a086c0 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000501
RDX: ffff88816baa9d40 RSI: ffffffff8c27c9e0 RDI: ffffffff8c27c9a0
RBP: ffffc90000a089b0 R08: ffffffff897d3917 R09: ffffffff8e75e640
R10: dffffc0000000000 R11: ffffed1032705de5 R12: ffffc90000a08860
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff1102e3e7e80
FS:  00007efd4100c6c0(0000) GS:ffff8882a945a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000c1c0 CR3: 0000000112a40000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000200000000300
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 rcu_lockdep_current_cpu_online+0x37/0x120
 rcu_read_lock_bh_held+0x23/0x50
 __dev_queue_xmit+0x2696/0x3890
 hsr_forward_skb+0x157b/0x2860
 send_hsr_supervision_frame+0x731/0xcb0
 hsr_announce+0x1db/0x370
 call_timer_fn+0x192/0x640
 __run_timer_base+0x652/0x8b0
 run_timer_softirq+0xb7/0x170
 handle_softirqs+0x22a/0x870
 __irq_exit_rcu+0x5f/0x150
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:its_return_thunk+0x0/0x10
Code: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc <c3> cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 e9 2b 9a 81 f5 cc
RSP: 0018:ffffc9000623f8a0 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 1ffff110220824c1 RCX: 0000000080000001
RDX: 0000000000000000 RSI: ffffffff8c27c9e0 RDI: ffffffff8c27c9a0
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff2023697 R12: 0000000000000002
R13: ffffffff8e75e5e0 R14: 0000000000000000 R15: 0000000000000000
 lock_acquire+0x57/0x2e0
 __flush_work+0x121/0xc50
 __cancel_work_sync+0xbe/0x110
 do_exit+0x3a0/0x23c0
 do_group_exit+0x21b/0x2d0
 get_signal+0x1284/0x1330
 arch_do_signal_or_restart+0xbc/0x830
 exit_to_user_mode_loop+0x86/0x480
 do_syscall_64+0x32d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efd4019c819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007efd4100c028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007efd40415fa0 RCX: 00007efd4019c819
RDX: 0000000000000005 RSI: 0000000040042408 RDI: 0000000000000006
RBP: 00007efd40232c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007efd40416038 R14: 00007efd40415fa0 R15: 00007ffed7930498
 </TASK>
sched: DL replenish lagged too much
