rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10409 ticks this GP) idle=fc24/1/0x4000000000000000 softirq=29486/29567 fqs=5194
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1226668        249            0
rcu: 	cputime:    31960      20528           38   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=24769 q=1811 ncpus=2)
CPU: 1 UID: 0 PID: 9368 Comm: syz.3.951 Not tainted syzkaller #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:strlen+0x2e/0x70
Code: 41 57 41 56 41 54 53 48 c7 c0 ff ff ff ff 49 be 00 00 00 00 00 fc ff df 48 89 fb 49 89 c7 48 89 d8 48 c1 e8 03 42 0f b6 04 30 <84> c0 75 11 48 ff c3 49 8d 47 01 42 80 7c 3f 01 00 75 de eb 19 89
RSP: 0018:ffffc900001e0538 EFLAGS: 00000a02
RAX: 0000000000000000 RBX: ffffffff8b8bd2a3 RCX: 0986e6f53fc09b00
RDX: ffffffff8172c195 RSI: ffffffff8e139ea0 RDI: ffffffff8b8bd2a0
RBP: ffffc900001e0660 R08: ffffc900068ffdc0 R09: 0000000000000000
R10: ffffc900001e07f8 R11: fffff5200003c101 R12: 1ffff9200003c0b4
R13: ffffffff8172c195 R14: dffffc0000000000 R15: 0000000000000002
FS:  00007f3d1cbda6c0(0000) GS:ffff8881a3c1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f43caae7d60 CR3: 000000002ebcc000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000200000000300
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 perf_trace_lock+0xc2/0x3b0
 lock_release+0x3b2/0x3e0
 unwind_next_frame+0x19a9/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5b/0x80
 kfree+0x18e/0x440
 slab_free_after_rcu_debug+0x60/0x2a0
 rcu_core+0xcab/0x1770
 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+0x1b3/0x4cc0
Code: f6 48 8b 1b 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 48 89 df e8 64 11 a9 f6 48 81 3b 9d 6e ac 57 <0f> 85 b7 18 00 00 45 85 ed 7f 54 49 8d 5e 18 48 89 d8 48 c1 e8 03
RSP: 0018:ffffc900068ff640 EFLAGS: 00000246
RAX: 1ffff92000d1f000 RBX: ffffc900068f8000 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: ffffffff8be332e0 RDI: ffffffff8be332a0
RBP: ffffc900068ff850 R08: ffffffff8fa38037 R09: 1ffffffff1f47006
R10: dffffc0000000000 R11: fffffbfff1f47007 R12: ffff8881a3c1c000
R13: 0000000000000001 R14: ffff88810e1c8000 R15: 1ffff11026cc7551
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:_raw_spin_lock_irqsave+0xc/0xf0
Code: 48 89 df 5b e9 85 34 22 f6 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 48 89 e5 41 57 41 56 <41> 54 53 48 83 e4 e0 48 83 ec 60 48 89 fb 65 48 8b 05 ae 74 24 07
RSP: 0018:ffffc900068ff9c8 EFLAGS: 00000296
RAX: 0000000000011958 RBX: ffffffff99d1fa58 RCX: 61c8864680b583eb
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff99d1fa60
RBP: ffffc900068ff9d8 R08: ffffc900068ffa67 R09: 0000000000000000
R10: ffffc900068ffa40 R11: fffff52000d1ff4d R12: ffff88812daf0000
R13: ffff88812daf8000 R14: 0000000000000000 R15: 0000000000000000
 debug_check_no_obj_freed+0x17a/0x470
 __free_frozen_pages+0x4dd/0xd30
 __put_partials+0x156/0x1a0
 put_cpu_partial+0x17c/0x250
 __slab_free+0x2d5/0x3c0
 qlist_free_all+0x97/0x140
 kasan_quarantine_reduce+0x148/0x160
 __kasan_slab_alloc+0x22/0x80
 kmem_cache_alloc_noprof+0x1c1/0x3c0
 security_inode_alloc+0x39/0x330
 inode_init_always_gfp+0x9ed/0xdc0
 alloc_inode+0x82/0x1b0
 __sock_create+0x12d/0x9f0
 __sys_socket+0xd7/0x1b0
 __x64_sys_socket+0x7a/0x90
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3d1bd8ebe9
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:00007f3d1cbda038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00007f3d1bfb5fa0 RCX: 00007f3d1bd8ebe9
RDX: 000000000000000c RSI: 0000000000000003 RDI: 0000000000000010
RBP: 00007f3d1be11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3d1bfb6038 R14: 00007f3d1bfb5fa0 R15: 00007fff5cd4e108
 </TASK>
