rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10463 ticks this GP) idle=3bb4/1/0x4000000000000000 softirq=23558/23560 fqs=5245
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1083941          0            0
rcu: 	cputime:    25978      26521           86   ==> 52510(ms)
rcu: 	(t=10502 jiffies g=16933 q=2973 ncpus=2)
CPU: 1 UID: 0 PID: 7902 Comm: syz.0.645 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: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 62 2c 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:ffffc900001e05a0 EFLAGS: 00000206
RAX: 4daa417e77d74800 RBX: 1ffff9200003c0bc RCX: 4daa417e77d74800
RDX: 0000000000000002 RSI: ffffffff8d99883e RDI: ffffffff8be29f40
RBP: ffffc900001e0698 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffffffff8e144400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000002
FS:  00007f617f43d6c0(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000001e448000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
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
 kfree+0x18e/0x440
 slab_free_after_rcu_debug+0x60/0x2a0
 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:futex_wait_setup+0xeb/0x460
Code: 41 0f b6 04 2e 84 c0 0f 85 cc 00 00 00 ff 03 48 b8 00 f0 ff ff ff 7f 00 00 48 8b 4c 24 10 48 39 c1 48 0f 47 c8 0f 1f 00 8b 29 <e8> e0 c2 0b 00 0f 1f 00 41 b5 01 41 89 ef 48 bd 00 00 00 00 00 fc
RSP: 0018:ffffc90002a2f9a8 EFLAGS: 00000283
RAX: 00007ffffffff000 RBX: ffff888026f95124 RCX: 00007f617e7b5fa8
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc90002a2f920
RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000545f24 R12: 0000000000000002
R13: ffffc90002a2faa0 R14: 1ffff11004df2a24 R15: 0000000000000000
 __futex_wait+0x148/0x3e0
 futex_wait+0x104/0x360
 do_futex+0x333/0x420
 __se_sys_futex+0x36f/0x400
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f617e58e9a9
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:00007f617f43d0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f617e7b5fa8 RCX: 00007f617e58e9a9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f617e7b5fa8
RBP: 00007f617e7b5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f617e7b5fac
R13: 0000000000000000 R14: 00007ffd64400570 R15: 00007ffd64400658
 </TASK>
sched: DL replenish lagged too much
clocksource: Long readout interval, skipping watchdog check: cs_nsec: 104436443059 wd_nsec: 104436442106
