rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=ddac/1/0x4000000000000000 softirq=34299/34300 fqs=4664
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1121123          0            0
rcu: 	cputime:    31397      21092           77   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=23205 q=4939 ncpus=2)
CPU: 0 UID: 0 PID: 10101 Comm: syz.2.1523 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:console_flush_all+0x7f7/0xc40
Code: 48 21 c3 0f 85 e9 01 00 00 e8 35 49 1f 00 48 8b 5c 24 20 4d 85 f6 75 07 e8 26 49 1f 00 eb 06 e8 1f 49 1f 00 fb 48 8b 44 24 28 <42> 80 3c 20 00 74 08 48 89 df e8 1a bf 82 00 48 8b 1b 48 8b 44 24
RSP: 0000:ffffc90004d57560 EFLAGS: 00000246
RAX: 1ffffffff1d36767 RBX: ffffffff8e9b3b38 RCX: ffff88802fa0d640
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90004d576b0 R08: ffffffff8fa38037 R09: 1ffffffff1f47006
R10: dffffc0000000000 R11: fffffbfff1f47007 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000200 R15: ffffffff8e9b3ae0
FS:  00007fbe3ae846c0(0000) GS:ffff8880b861c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000004 CR3: 0000000028422000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 console_unlock+0xc4/0x270
 vprintk_emit+0x5b7/0x7a0
 _printk+0xcf/0x120
 clocksource_watchdog+0xdca/0x1160
 call_timer_fn+0x17e/0x5f0
 __run_timer_base+0x61a/0x860
 run_timer_softirq+0x67/0x180
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0x57/0xc0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0033:0x7fbe39e5eb70
Code: 41 5e c3 0f 1f 80 00 00 00 00 48 8b 44 24 18 48 8b 1c 24 48 8b 70 68 8b 78 08 48 8d 53 30 e8 c7 57 ff ff 48 89 83 88 00 00 00 <e9> 38 fe ff ff 0f 1f 00 8b 7c 24 14 48 8d 74 24 40 ba 0f 00 00 00
RSP: 002b:00007fbe3ae84060 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 00007fbe3a1b5fa0 RCX: 00007fbe3a011e19
RDX: 0000000000000000 RSI: 0000000000005452 RDI: 0000000000000003
RBP: 00007fbe3a011e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbe3a1b6038 R14: 00007fbe3a1b5fa0 R15: 00007ffcb84c2318
 </TASK>
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 10101 Comm: syz.2.1523 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:console_flush_all+0x7f7/0xc40
Code: 48 21 c3 0f 85 e9 01 00 00 e8 35 49 1f 00 48 8b 5c 24 20 4d 85 f6 75 07 e8 26 49 1f 00 eb 06 e8 1f 49 1f 00 fb 48 8b 44 24 28 <42> 80 3c 20 00 74 08 48 89 df e8 1a bf 82 00 48 8b 1b 48 8b 44 24
RSP: 0000:ffffc90004d57560 EFLAGS: 00000246
RAX: 1ffffffff1d36767 RBX: ffffffff8e9b3b38 RCX: ffff88802fa0d640
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90004d576b0 R08: ffffffff8fa38037 R09: 1ffffffff1f47006
R10: dffffc0000000000 R11: fffffbfff1f47007 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000200 R15: ffffffff8e9b3ae0
FS:  00007fbe3ae846c0(0000) GS:ffff8880b861c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000004 CR3: 0000000028422000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 console_unlock+0xc4/0x270
 vprintk_emit+0x5b7/0x7a0
 _printk+0xcf/0x120
 clocksource_watchdog+0xdca/0x1160
 call_timer_fn+0x17e/0x5f0
 __run_timer_base+0x61a/0x860
 run_timer_softirq+0x67/0x180
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0x57/0xc0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0033:0x7fbe39e5eb70
Code: 41 5e c3 0f 1f 80 00 00 00 00 48 8b 44 24 18 48 8b 1c 24 48 8b 70 68 8b 78 08 48 8d 53 30 e8 c7 57 ff ff 48 89 83 88 00 00 00 <e9> 38 fe ff ff 0f 1f 00 8b 7c 24 14 48 8d 74 24 40 ba 0f 00 00 00
RSP: 002b:00007fbe3ae84060 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 00007fbe3a1b5fa0 RCX: 00007fbe3a011e19
RDX: 0000000000000000 RSI: 0000000000005452 RDI: 0000000000000003
RBP: 00007fbe3a011e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbe3a1b6038 R14: 00007fbe3a1b5fa0 R15: 00007ffcb84c2318
 </TASK>
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 10101 Comm: syz.2.1523 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:native_apic_msr_eoi+0xf/0x20
Code: f8 c3 cc cc cc cc cc 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa b9 0b 08 00 00 31 c0 31 d2 0f 30 <e9> bc ca 0a 0a cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90
RSP: 0000:ffffc90000007fd8 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffffc90004d574b8 RCX: 000000000000080b
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 0000000000000000 R08: ffff88804b023b0f R09: 1ffff11009604761
R10: dffffc0000000000 R11: ffffed1009604762 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fbe3ae846c0(0000) GS:ffff8880b861c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000004 CR3: 0000000028422000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __sysvec_irq_work+0x11/0x3d0
 sysvec_irq_work+0x9e/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_irq_work+0x1a/0x20
RIP: 0010:console_flush_all+0x7f7/0xc40
Code: 48 21 c3 0f 85 e9 01 00 00 e8 35 49 1f 00 48 8b 5c 24 20 4d 85 f6 75 07 e8 26 49 1f 00 eb 06 e8 1f 49 1f 00 fb 48 8b 44 24 28 <42> 80 3c 20 00 74 08 48 89 df e8 1a bf 82 00 48 8b 1b 48 8b 44 24
RSP: 0000:ffffc90004d57560 EFLAGS: 00000246
RAX: 1ffffffff1d36767 RBX: ffffffff8e9b3b38 RCX: ffff88802fa0d640
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90004d576b0 R08: ffffffff8fa38037 R09: 1ffffffff1f47006
R10: dffffc0000000000 R11: fffffbfff1f47007 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000200 R15: ffffffff8e9b3ae0
 console_unlock+0xc4/0x270
 vprintk_emit+0x5b7/0x7a0
 _printk+0xcf/0x120
 clocksource_watchdog+0xdca/0x1160
 call_timer_fn+0x17e/0x5f0
 __run_timer_base+0x61a/0x860
 run_timer_softirq+0x67/0x180
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0x57/0xc0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0033:0x7fbe39e5eb70
Code: 41 5e c3 0f 1f 80 00 00 00 00 48 8b 44 24 18 48 8b 1c 24 48 8b 70 68 8b 78 08 48 8d 53 30 e8 c7 57 ff ff 48 89 83 88 00 00 00 <e9> 38 fe ff ff 0f 1f 00 8b 7c 24 14 48 8d 74 24 40 ba 0f 00 00 00
RSP: 002b:00007fbe3ae84060 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 00007fbe3a1b5fa0 RCX: 00007fbe3a011e19
RDX: 0000000000000000 RSI: 0000000000005452 RDI: 0000000000000003
RBP: 00007fbe3a011e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbe3a1b6038 R14: 00007fbe3a1b5fa0 R15: 00007ffcb84c2318
 </TASK>
