rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10501 ticks this GP) idle=6ec4/1/0x4000000000000000 softirq=19389/19555 fqs=5248
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1197927          0            0
rcu: 	cputime:    25751      26748           77   ==> 52510(ms)
rcu: 	(t=10502 jiffies g=10973 q=1304 ncpus=2)
CPU: 1 UID: 0 PID: 7059 Comm: syz.2.534 Not tainted 6.16.0-syzkaller-06600-g1dbf1d590d10-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:_raw_spin_unlock_irq+0x29/0x50
Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 6a 20 2b f6 48 89 df e8 c2 b7 2b f6 e8 ad dc 54 f6 fb bf 01 00 00 00 <e8> 72 b5 1d f6 65 8b 05 6b 9f 27 07 85 c0 74 07 5b e9 51 4c 00 00
RSP: 0018:ffffc900001e0c90 EFLAGS: 00000286
RAX: 52b29c8f56647900 RBX: ffff888136625900 RCX: 52b29c8f56647900
RDX: 0000000000000002 RSI: ffffffff8d9792eb RDI: 0000000000000001
RBP: ffffc900001e0e10 R08: ffffffff8fa07bf7 R09: 1ffffffff1f40f7e
R10: dffffc0000000000 R11: fffffbfff1f40f7f R12: ffff888136625900
R13: 1ffff9200003c1ac R14: ffff888117906dc8 R15: ffffc900001e0d60
FS:  00007f4ba76156c0(0000) GS:ffff8881a3c80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4ba7614fc8 CR3: 0000000100e8a000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __run_timer_base+0x60a/0x860
 run_timer_softirq+0xb7/0x180
 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 eb 1f 1f f6 e8 c6 48 56 f6 fb bf 01 00 00 00 <e8> eb aa ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc9000391efc0 EFLAGS: 00000282
RAX: 52b29c8f56647900 RBX: 0000000000000000 RCX: 52b29c8f56647900
RDX: 0000000000000006 RSI: ffffffff8d9792eb RDI: 0000000000000001
RBP: ffffc9000391f060 R08: ffffffff8fa07bf7 R09: 1ffffffff1f40f7e
R10: dffffc0000000000 R11: fffffbfff1f40f7f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000723df8
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:rcu_preempt_deferred_qs_irqrestore+0x874/0xc40
Code: 24 20 e8 4f 3b cb 09 8b 44 24 34 44 08 e0 a8 01 75 18 4c 89 f7 e8 7c 38 cb 09 4c 89 f7 be 01 00 00 00 48 89 c2 e8 9c f6 00 00 <48> c7 84 24 a0 00 00 00 0e 36 e0 45 48 8b 84 24 98 00 00 00 4a c7
RSP: 0018:ffffc9000391f120 EFLAGS: 00000206
RAX: 52b29c8f56647900 RBX: 1ffff11026cc75ea RCX: 52b29c8f56647900
RDX: 0000000000000006 RSI: ffffffff8d9792eb RDI: ffffffff8be30a00
RBP: ffffc9000391f270 R08: ffffffff8fa07bf7 R09: 1ffffffff1f40f7e
R10: dffffc0000000000 R11: fffffbfff1f40f7f R12: ffff888119315640
R13: 0000000000000802 R14: ffff88813663af68 R15: dffffc0000000000
 rcu_read_unlock_special+0x3fe/0x4c0
 __rcu_read_unlock+0x84/0xe0
 copy_pmd_range+0x67b9/0x7000
 copy_page_range+0xc46/0x1270
 dup_mmap+0xf57/0x1ac0
 copy_mm+0x13c/0x4b0
 copy_process+0x1706/0x3c00
 kernel_clone+0x21e/0x840
 __x64_sys_clone+0x18b/0x1e0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4ba678eb69
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:00007f4ba7614fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f4ba69b6080 RCX: 00007f4ba678eb69
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000400
RBP: 00007f4ba6811df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f4ba69b6080 R15: 00007fffa8cb0128
 </TASK>
sched: DL replenish lagged too much
