rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10499 ticks this GP) idle=3c1c/1/0x4000000000000000 softirq=40163/40163 fqs=4580
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1128796          1            0
rcu: 	cputime:    23174      29315           87   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=27693 q=2617 ncpus=2)
CPU: 0 UID: 0 PID: 10708 Comm: syz.2.1461 Not tainted 6.16.0-rc6-syzkaller-00411-g95993dc3039e-dirty #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:clocksource_watchdog+0x2f2/0x11c0
Code: 80 3c 30 00 74 08 4c 89 ff e8 9a ae 73 00 4d 8b 1f 4c 89 ff 2e e8 2e ca c1 09 49 89 c4 e8 76 16 18 00 fb 48 8b 3d 5e fa ff 17 <48> 8b 74 24 28 48 89 da e8 b1 d1 ff ff 49 89 c5 48 8b 44 24 78 42
RSP: 0018:ffffc90000007a60 EFLAGS: 00000286
RAX: 3398321ce2ee8900 RBX: 00000047513aa41e RCX: 3398321ce2ee8900
RDX: 0000000000000002 RSI: ffffffff8d99883e RDI: ffffffff8dfa9400
RBP: ffffc90000007b90 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: 00000047513aa445
R13: 0000000000000000 R14: dffffc0000000000 R15: ffffffff8dfa9400
FS:  00007f668edb96c0(0000) GS:ffff8880b861f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000004e000 CR3: 0000000028020000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 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 8b 1d 21 f6 e8 c6 f0 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:ffffc900028ff5e0 EFLAGS: 00000282
RAX: 3398321ce2ee8900 RBX: 0000000000000000 RCX: 3398321ce2ee8900
RDX: 0000000000000006 RSI: ffffffff8d99883e RDI: 0000000000000001
RBP: ffffc900028ff690 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200051febc
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
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:ffffc900028ff758 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888048b00000 RCX: 0000000000000428
RDX: 0000000000000001 RSI: 000020000004e000 RDI: ffff888048b05ec0
RBP: ffffc900028ff8b0 R08: ffff888048b07fff R09: 1ffff11009160fff
R10: dffffc0000000000 R11: ffffed1009161000 R12: 1ffff9200051ff77
R13: 0000200000048140 R14: ffffc900028ffbc8 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: 0033:0x7f668df8e9a9
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:00007f668edb9038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f668e1b5fa0 RCX: 00007f668df8e9a9
RDX: 00000000fffffdef RSI: 0000200000000140 RDI: 000000000000000a
RBP: 00007f668e010d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f668e1b5fa0 R15: 00007ffcbd3aeb78
 </TASK>
sched: DL replenish lagged too much
