rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P6195/1:b..l
rcu: 	(detected by 0, t=10503 jiffies, g=20165, q=948340 ncpus=2)
task:syz.0.147       state:R  running task     stack:26856 pid:6195  tgid:6194  ppid:5647   task_flags:0x40044c flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x17d9/0x56c0 kernel/sched/core.c:7234
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7556
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x14f/0x8f0 kernel/entry/common.c:167
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_release+0x2d7/0x3c0 kernel/locking/lockdep.c:5893
Code: 8d ca 11 00 00 00 00 eb b5 e8 c5 ed 2c 0a f7 c3 00 02 00 00 74 b9 65 48 8b 05 b5 48 ca 11 48 3b 44 24 28 75 44 fb 48 83 c4 30 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 9a ee 2f 0a cc 48 8d 3d 72 b9 b8
RSP: 0018:ffffc90005e57308 EFLAGS: 00000282
RAX: ee0620419260aa00 RBX: 0000000000000206 RCX: 0000000000000046
RDX: 0000000000000001 RSI: ffffffff8e4b0217 RDI: ffffffff8c4bd780
RBP: ffff8880261de8c8 R08: ffffc90005e57c30 R09: 0000000000000000
R10: ffffc90005e57438 R11: fffff52000bcae89 R12: 0000000000000001
R13: 0000000000000001 R14: ffffffff8eb59c60 R15: ffff8880261ddd00
 rcu_lock_release include/linux/rcupdate.h:310 [inline]
 rcu_read_unlock include/linux/rcupdate.h:871 [inline]
 class_rcu_destructor include/linux/rcupdate.h:1183 [inline]
 unwind_next_frame+0x1baa/0x2550 arch/x86/kernel/unwind_orc.c:709
 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:57
 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556
 slab_free_hook mm/slub.c:2666 [inline]
 slab_free mm/slub.c:6405 [inline]
 kmem_cache_free+0x44f/0x650 mm/slub.c:6532
 tear_down_vmas+0x312/0x520 mm/mmap.c:1262
 exit_mmap+0x4ca/0x9f0 mm/mmap.c:1320
 __mmput+0x118/0x420 kernel/fork.c:1187
 exit_mm+0x221/0x2d0 kernel/exit.c:615
 do_exit+0x6cd/0x2360 kernel/exit.c:997
 do_group_exit+0x22d/0x2f0 kernel/exit.c:1152
 get_signal+0x121b/0x12c0 kernel/signal.c:3046
 arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
 exit_to_user_mode_loop+0x104/0x730 kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline]
 do_syscall_64+0x353/0x580 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcf9159daeb
RSP: 002b:00007fcf9247bf00 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 00007fcf9159daeb
RDX: 00007fcf9247cfd0 RSI: 0000000080085502 RDI: 0000000000000003
RBP: 00007fcf9247cfd0 R08: 0000000000000040 R09: 00007fcf9247bfc8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000080085502
R13: 0000000800000000 R14: 0000000000000012 R15: 00007fcf91652687
 </TASK>