rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P14764/1:b..l
rcu: 	(detected by 1, t=10503 jiffies, g=82569, q=3686 ncpus=2)
task:syz.5.2424      state:R  running task     stack:23456 pid:14764 tgid:14759 ppid:11537  task_flags:0x40054c flags:0x10080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5248 [inline]
 __schedule+0x14bc/0x5000 kernel/sched/core.c:6855
 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7182
 irqentry_exit+0x5d8/0x660 kernel/entry/common.c:216
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:100 [inline]
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:227 [inline]
RIP: 0010:unwind_next_frame+0x12ee/0x2390 arch/x86/kernel/unwind_orc.c:494
Code: 89 de e8 55 a2 b3 ff e9 43 06 00 00 49 89 d5 48 89 d5 48 89 d8 48 29 e8 48 89 c1 48 c1 f9 02 48 c1 e8 3f 48 01 c8 48 83 e0 fe <4c> 8d 3c 45 00 00 00 00 49 01 ef 4c 89 f8 48 c1 e8 03 48 b9 00 00
RSP: 0018:ffffc900045cf278 EFLAGS: 00000202
RAX: 0000000000000004 RBX: ffffffff8fa0b908 RCX: 0000000000000005
RDX: ffffffff8fa0b8f4 RSI: ffffffff901fed00 RDI: ffffffff8bbfbfa0
RBP: ffffffff8fa0b8f4 R08: 000000000000000e R09: ffffffff8df42000
R10: ffffc900045cf398 R11: ffffffff81ad12f0 R12: ffffffff822666a2
R13: ffffffff8fa0b8f4 R14: ffffc900045cf348 R15: ffffffff8fa0b90c
 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:56 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:77
 poison_kmalloc_redzone mm/kasan/common.c:400 [inline]
 __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:417
 kasan_kmalloc include/linux/kasan.h:262 [inline]
 __kmalloc_cache_noprof+0x3d5/0x6e0 mm/slub.c:5771
 kmalloc_noprof include/linux/slab.h:957 [inline]
 slab_free_hook mm/slub.c:2495 [inline]
 slab_free mm/slub.c:6642 [inline]
 kmem_cache_free+0x166/0x670 mm/slub.c:6752
 exit_mmap+0x532/0xb20 mm/mmap.c:1305
 __mmput+0x118/0x430 kernel/fork.c:1131
 exit_mm+0x1da/0x2c0 kernel/exit.c:583
 do_exit+0x658/0x2310 kernel/exit.c:961
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1114
 get_signal+0x1285/0x1340 kernel/signal.c:3034
 arch_do_signal_or_restart+0x9a/0x7a0 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop+0x87/0x4f0 kernel/entry/common.c:75
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
 __do_fast_syscall_32+0x3cb/0x570 arch/x86/entry/syscall_32.c:310
 do_fast_syscall_32+0x34/0x80 arch/x86/entry/syscall_32.c:332
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf704d539
RSP: 002b:00000000f53fb55c EFLAGS: 00000206 ORIG_RAX: 000000000000017a
RAX: fffffffffffffffc RBX: 000000000000000a RCX: 0000000080000080
RDX: 0000000000000002 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>