rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P12408/1:b..l
	(detected by 1, t=10502 jiffies, g=39777, q=2830)
task:syz.4.2998      state:R  running task     stack:25944 pid:12408 ppid:  4193 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11ef/0x43c0 kernel/sched/core.c:6395
 preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6799
 irqentry_exit+0x63/0x70 kernel/entry/common.c:432
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:check_region_inline mm/kasan/generic.c:169 [inline]
RIP: 0010:kasan_check_range+0xc/0x290 mm/kasan/generic.c:189
Code: c0 c3 0f 0b b8 ea ff ff ff c3 0f 0b b8 ea ff ff ff c3 00 00 cc cc 00 00 cc cc 00 00 cc cc b0 01 48 85 f6 0f 84 ac 01 00 00 55 <41> 57 41 56 41 54 53 49 89 f8 49 01 f0 0f 82 0e 02 00 00 49 89 f8
RSP: 0018:ffffc90002e2fab0 EFLAGS: 00000202
RAX: ffffffff881e2501 RBX: 1ffff920005c5f75 RCX: ffffffff881e258f
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8880629a0000
RBP: 00000000fffffdff R08: ffffc90002e2faef R09: ffffc90002e2fae8
R10: dffffc0000000000 R11: fffff520005c5f5e R12: ffff8880629a0000
R13: 00000000000c126c R14: ffffc90002e2fba8 R15: ffffc90002e2fbac
 instrument_atomic_read include/linux/instrumented.h:71 [inline]
 test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
 test_ti_thread_flag include/linux/thread_info.h:118 [inline]
 test_tsk_thread_flag include/linux/sched.h:1994 [inline]
 signal_pending include/linux/sched/signal.h:374 [inline]
 bpf_test_timer_continue+0x6f/0x380 net/bpf/test_run.c:67
 bpf_test_run+0x3a7/0x800 net/bpf/test_run.c:120
 bpf_prog_test_run_skb+0x9cc/0x1180 net/bpf/test_run.c:674
 bpf_prog_test_run+0x31e/0x390 kernel/bpf/syscall.c:3374
 __sys_bpf+0x5a5/0x6f0 kernel/bpf/syscall.c:4675
 __do_sys_bpf kernel/bpf/syscall.c:4761 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:4759 [inline]
 __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4759
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f519b55e629
RSP: 002b:00007f51997b8028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f519b7d7fa0 RCX: 00007f519b55e629
RDX: 0000000000000050 RSI: 0000200000000180 RDI: 000000000000000a
RBP: 00007f519b5f4b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f519b7d8038 R14: 00007f519b7d7fa0 R15: 00007ffca9dfb1f8
 </TASK>