rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=8c64/1/0x4000000000000000 softirq=15229/15230 fqs=4498
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1011423          1            0
rcu: 	cputime:    25036      27443           91   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=8097 q=3445 ncpus=2)
CPU: 1 UID: 0 PID: 6620 Comm: syz.2.338 Not tainted 6.16.0-rc6-syzkaller-00434-gcd7c97f4584a #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_unlock+0x155/0x1a0
Code: 00 4d 85 ff 75 16 e8 fa f7 1e 00 eb 15 e8 f3 f7 1e 00 e8 4e 63 cd 09 4d 85 ff 74 ea e8 e4 f7 1e 00 fb 48 c7 04 24 0e 36 e0 45 <4a> c7 04 33 00 00 00 00 66 42 c7 44 33 09 00 00 42 c6 44 33 0b 00
RSP: 0018:ffffc900001e06c0 EFLAGS: 00000246
RAX: ffffffff81a125dc RBX: 1ffff9200003c0d8 RCX: ffff888025548000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900001e0770 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: 0000000000000000
R13: dffffc0000000000 R14: dffffc0000000000 R15: 0000000000000200
FS:  00007fb4828356c0(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000007ba000 CR3: 00000000306e6000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 console_unlock+0xe7/0x270
 vprintk_emit+0x5b7/0x7a0
 _printk+0xcf/0x120
 clocksource_watchdog+0xdca/0x11c0
 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_irq_work+0xa3/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_irq_work+0x1a/0x20
RIP: 0010:preempt_schedule_irq+0xb0/0x150
Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 5b 22 21 f6 e8 96 f5 57 f6 fb bf 01 00 00 00 <e8> 1b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc9000a597440 EFLAGS: 00000286
RAX: 47b65dc3a4d4ea00 RBX: 0000000000000000 RCX: 47b65dc3a4d4ea00
RDX: 0000000000000006 RSI: ffffffff8d9986f9 RDI: 0000000000000001
RBP: ffffc9000a5974f0 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920014b2e88
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:do_user_addr_fault+0x1ae/0x1390
Code: 1b 48 89 de 48 81 e6 00 02 00 00 31 ff e8 5a 72 4c 00 48 81 e3 00 02 00 00 0f 84 79 0e 00 00 e8 88 f9 53 00 fb 4c 89 7c 24 38 <0f> 1f 44 00 00 e8 58 6d 4c 00 44 89 f6 83 e6 40 31 ff 48 89 74 24
RSP: 0018:ffffc9000a5975b8 EFLAGS: 00000286
RAX: 47b65dc3a4d4ea00 RBX: 0000000000000200 RCX: 47b65dc3a4d4ea00
RDX: 0000000000000006 RSI: ffffffff8d9986f9 RDI: ffffffff8be29f80
RBP: dffffc0000000000 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffffc9000a5976a8
R13: 00002000007ba000 R14: 0000000000000000 R15: ffff888025548000
 exc_page_fault+0x76/0xf0
 asm_exc_page_fault+0x26/0x30
RIP: 0010:rep_movs_alternative+0x75/0x90
Code: 05 c3 cc cc cc cc 48 8b 06 48 89 07 48 8d 47 08 48 83 e0 f8 48 29 f8 48 01 c7 48 01 c6 48 29 c1 48 89 c8 48 c1 e9 03 83 e0 07 <f3> 48 a5 89 c1 85 c9 75 91 e9 fd 00 04 00 48 8d 0c c8 eb 86 cc cc
RSP: 0018:ffffc9000a597758 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88810f2c8000 RCX: 0000000000000c28
RDX: 0000000000000001 RSI: 00002000007ba000 RDI: ffff88810f2c9ec0
RBP: ffffc9000a5978b0 R08: ffff88810f2cffff R09: 1ffff11021e59fff
R10: dffffc0000000000 R11: ffffed1021e5a000 R12: 1ffff920014b2f77
R13: 00002000007b8140 R14: ffffc9000a597bc8 R15: 0000000000008000
 _copy_from_iter+0x24c/0x16f0
 kcm_sendmsg+0xeb2/0x2a70
 __sock_sendmsg+0x21c/0x270
 sock_write_iter+0x258/0x330
 vfs_write+0x54b/0xa90
 ksys_write+0x145/0x250
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb48198eb69
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb482835038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fb481bb5fa0 RCX: 00007fb48198eb69
RDX: 00000000fffffdef RSI: 0000200000000140 RDI: 000000000000000b
RBP: 00007fb481a11df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb481bb5fa0 R15: 00007ffc01c6bb88
 </TASK>
sched: DL replenish lagged too much
