rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5646/1:b..l
rcu: 	(detected by 1, t=10503 jiffies, g=137677, q=1013085 ncpus=2)
task:syz-executor    state:R  running task     stack:22480 pid:5646  tgid:5646  ppid:5624   task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5504 [inline]
 __schedule+0x17d9/0x56c0 kernel/sched/core.c:7228
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7552
 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:unwind_next_frame+0x70a/0x2550 arch/x86/kernel/unwind_orc.c:527
Code: 04 20 84 c0 0f 85 a3 17 00 00 0f b7 1a c1 eb 0b 80 e3 01 48 8b 04 24 42 0f b6 04 20 84 c0 0f 85 ac 17 00 00 49 8d 46 35 88 18 <0f> b7 1a 83 e3 0f 83 fb 04 0f 8e 84 00 00 00 83 fb 06 0f 8e 87 01
RSP: 0018:ffffc900041c7980 EFLAGS: 00000246
RAX: ffffc900041c7a5d RBX: 0000000000000000 RCX: ffffffff905556e8
RDX: ffffffff90d64f2c RSI: ffffffff90d64f10 RDI: ffffffff8c2a9120
RBP: ffffc900041c7a60 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8e959c20 R12: dffffc0000000000
R13: ffffffff90d64f28 R14: ffffc900041c7a28 R15: 1ffff92000838f45
 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
 fput_close_sync+0x11f/0x240 fs/file_table.c:617
 __do_sys_close fs/open.c:1511 [inline]
 __se_sys_close fs/open.c:1496 [inline]
 __x64_sys_close+0x7e/0x110 fs/open.c:1496
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8c4735d68e
RSP: 002b:00007f8c4773fd48 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 000055557fe68500 RCX: 00007f8c4735d68e
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007f8c4773fdec R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000243
R13: 00000000000927c0 R14: 00000000000a50a4 R15: 00007f8c4773fe40
 </TASK>