rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10501 ticks this GP) idle=d0f4/1/0x4000000000000000 softirq=13337/13337 fqs=5247
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1037000          0            0
rcu: 	cputime:    26058      26431           87   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=5677 q=4460 ncpus=2)
CPU: 1 UID: 0 PID: 5929 Comm: syz.2.14 Not tainted 6.16.0-rc6-syzkaller-00434-gcd7c97f4584a-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:handle_softirqs+0x1b0/0x870
Code: 89 64 24 30 0f b7 db 48 c7 c7 00 ad 89 8b e8 17 ef e8 09 65 66 c7 05 f5 5b 1a 11 00 00 e8 98 f5 41 00 fb 49 c7 c7 c0 c0 e0 8d <b8> ff ff ff ff 0f bc c3 41 89 c5 41 ff c5 0f 84 c2 03 00 00 89 5c
RSP: 0018:ffffc900001e0e40 EFLAGS: 00000286
RAX: 609ed9ec80bf6800 RBX: 0000000000000200 RCX: 609ed9ec80bf6800
RDX: 0000000000000002 RSI: ffffffff8d998701 RDI: ffffffff8be29f80
RBP: ffffc900001e0f50 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: 000000000000000a
R13: 0000000000000000 R14: dffffc0000000000 R15: ffffffff8de0c0c0
FS:  00007f43ae7f66c0(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000023e000 CR3: 000000001e584000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:rcu_read_unlock_special+0x36/0x4c0
Code: 41 55 41 54 53 48 83 e4 e0 48 81 ec c0 00 00 00 65 48 8b 05 dc 37 f8 10 48 89 84 24 a0 00 00 00 49 bd 00 00 00 00 00 fc ff df <48> c7 44 24 40 b3 8a b5 41 48 c7 44 24 48 77 44 9d 8d 48 c7 44 24
RSP: 0018:ffffc9000487f280 EFLAGS: 00000282
RAX: 609ed9ec80bf6800 RBX: ffff88810912da84 RCX: 609ed9ec80bf6800
RDX: 0000000000000003 RSI: ffffffff8db863e2 RDI: ffff88810912d640
RBP: ffffc9000487f380 R08: ffff888106087ea3 R09: 1ffff11020c10fd4
R10: dffffc0000000000 R11: ffffed1020c10fd5 R12: 1ffff11021225b50
R13: dffffc0000000000 R14: ffff88810912da88 R15: dffffc0000000000
 __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+0x16d3/0x3b80
 kernel_clone+0x21e/0x870
 __x64_sys_clone+0x18b/0x1e0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f43b098eb69
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:00007f43ae7f5fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f43b0bb6080 RCX: 00007f43b098eb69
RDX: 0000000000000000 RSI: 00002000000000d0 RDI: 0000000000102200
RBP: 00007f43b0a11df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f43b0bb6080 R15: 00007ffee657fd88
 </TASK>
sched: DL replenish lagged too much
