rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10501 ticks this GP) idle=bab4/1/0x4000000000000000 softirq=15490/15490 fqs=5250
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   813317          0            0
rcu: 	cputime:    28008      24481          116   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=7685 q=5162 ncpus=2)
CPU: 0 UID: 0 PID: 6149 Comm: syz.2.112 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:ffffc900000075e0 EFLAGS: 00000206
RAX: 308072a850a1be00 RBX: 1ffff92000000ec4 RCX: 308072a850a1be00
RDX: 0000000000000000 RSI: ffffffff8d9987c6 RDI: ffffffff8be29f80
RBP: ffffc900000076d8 R08: ffffffff8fa1eaf7 R09: 1ffffffff1f43d5e
R10: dffffc0000000000 R11: fffffbfff1f43d5f R12: ffffffff8e144400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
FS:  00007fd32905d6c0(0000) GS:ffff8880b861f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f65e6642257 CR3: 0000000110610000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000090602
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:rcu_read_unlock_special+0x64/0x4c0
Code: 40 b3 8a b5 41 48 c7 44 24 48 3c 45 9d 8d 48 c7 44 24 50 20 d8 a7 81 48 8d 5c 24 40 48 c1 eb 03 48 b8 f1 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
RSP: 0018:ffffc90003adf1c0 EFLAGS: 00000a02
RAX: f2f2f200f1f1f1f1 RBX: 1ffff9200075be40 RCX: 308072a850a1be00
RDX: 0000000000000000 RSI: ffffffff8db864db RDI: ffff888107985640
RBP: ffffc90003adf2b8 R08: ffffc90003adfdb0 R09: 0000000000000000
R10: ffffc90003adf418 R11: fffff5200075be85 R12: 1ffff11020f30b50
R13: dffffc0000000000 R14: ffff888107985a88 R15: dffffc0000000000
 __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_kmalloc+0x93/0xb0
 __kmalloc_cache_noprof+0x230/0x3d0
 kmem_cache_free+0x166/0x400
 __fput_deferred+0x227/0x390
 fput_close+0x119/0x200
 path_openat+0x313c/0x3830
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x1c0
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd32818d310
Code: 48 89 44 24 20 75 93 44 89 54 24 0c e8 49 94 02 00 44 8b 54 24 0c 89 da 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 38 44 89 c7 89 44 24 0c e8 9c 94 02 00 8b 44
RSP: 002b:00007fd32905cf10 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fd32818d310
RDX: 0000000000000002 RSI: 00007fd32905cfa0 RDI: 00000000ffffff9c
RBP: 00007fd32905cfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd3283b5fa0 R15: 00007fffc46fb198
 </TASK>
