rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10498 ticks this GP) idle=a87c/1/0x4000000000000000 softirq=15069/15070 fqs=4734
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1165230          0            0
rcu: 	cputime:    25198      27281           77   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=7373 q=3865 ncpus=2)
CPU: 1 UID: 0 PID: 6169 Comm: syz.1.123 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:rcu_read_unlock_special+0x87/0x4c0
Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 92 37 f8 10 41 f7 c6 00 00 f0 00 74 49 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b
RSP: 0018:ffffc900001e05e0 EFLAGS: 00000206
RAX: 4f00cce7bb74ee00 RBX: 1ffff9200003c0c4 RCX: 4f00cce7bb74ee00
RDX: 0000000000000000 RSI: ffffffff8d998701 RDI: ffffffff8be29f80
RBP: ffffc900001e06d8 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffffffff8e144400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000002
FS:  00007f80fca336c0(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2b8376 CR3: 0000000113866000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 __rcu_read_unlock+0x84/0xe0
 unwind_next_frame+0x19ae/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x62/0x70
 kmem_cache_free+0x18f/0x400
 rcu_core+0xca8/0x1710
 handle_softirqs+0x286/0x870
 __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:__schedule+0x263/0x4d00
Code: 75 1f c6 05 eb 49 1c 04 01 48 c7 c7 40 43 8a 8b be 5f 17 00 00 48 c7 c2 40 4c 8a 8b e8 56 f9 2e f6 e8 11 2e ff ff 85 c0 74 46 <48> c7 c7 60 f1 13 8e be ff ff ff ff e8 0c 2a ff ff 85 c0 74 31 e8
RSP: 0018:ffffc90006e77980 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffc90006e70000 RCX: ffff88802352b980
RDX: 0000000000000000 RSI: ffffffff8db863e2 RDI: ffffffff8be29f80
RBP: ffffc90006e77b90 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffff88813663aac8
R13: dffffc0000000000 R14: ffff88802352b980 R15: ffff8881a3c1f000
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:do_futex+0x21/0x420
Code: 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec a0 00 00 00 44 89 4c 24 2c <4c> 89 44 24 30 48 89 4c 24 38 89 54 24 1c 41 89 f5 48 89 7c 24 20
RSP: 0018:ffffc90006e77d00 EFLAGS: 00000286
RAX: ffffffff81b3b975 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f80fbdb5fac
RBP: ffffc90006e77dc8 R08: 7fffffffffffffff R09: 00000000ffffffff
R10: 000000000000000d R11: 0000000000000002 R12: 0000000000000001
R13: ffffc90006e77e60 R14: ffffffffffffffff R15: 0000000000000000
 __se_sys_futex+0x36f/0x400
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f80fbb8e9a9
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:00007f80fca330e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f80fbdb5fa8 RCX: 00007f80fbb8e9a9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f80fbdb5fac
RBP: 00007f80fbdb5fa0 R08: 7fffffffffffffff R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f80fbdb5fac
R13: 0000000000000000 R14: 00007ffcc5c33a40 R15: 00007ffcc5c33b28
 </TASK>
sched: DL replenish lagged too much
