rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P6012 P6036/1:b.el
	(detected by 1, t=10502 jiffies, g=16789, q=3055)
task:syz.2.426       state:R  running task     stack:23440 pid: 6036 ppid:  4188 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:bytes_is_nonzero mm/kasan/generic.c:85 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:102 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x84/0x290 mm/kasan/generic.c:189
Code: 49 c1 e9 03 4b 8d 1c 21 49 89 df 4d 29 df 49 83 ff 10 7f 29 4d 85 ff 0f 84 38 01 00 00 4c 89 cb 48 f7 d3 4c 01 f3 41 80 3b 00 <0f> 85 86 01 00 00 49 ff c3 48 ff c3 75 ee e9 18 01 00 00 44 89 dd
RSP: 0018:ffffc9000336fa90 EFLAGS: 00000246
RAX: ffffffff881e8601 RBX: ffffffffffffffff RCX: ffffffff881e861f
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888017bb8000
RBP: 0000000000000000 R08: ffff888017bb8007 R09: 1ffff11002f77000
R10: dffffc0000000000 R11: ffffed1002f77000 R12: dffffc0000000001
R13: 1ffff11002f77000 R14: 1ffff11002f77000 R15: 0000000000000001
 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:1997 [inline]
 task_sigpending include/linux/sched/signal.h:364 [inline]
 signal_pending include/linux/sched/signal.h:376 [inline]
 bpf_test_timer_continue+0xbf/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: 0033:0x7f671ae09e59
RSP: 002b:00007f6719063028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f671b082fa0 RCX: 00007f671ae09e59
RDX: 0000000000000050 RSI: 00002000000007c0 RDI: 000000000000000a
RBP: 00007f671ae9fd6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f671b083038 R14: 00007f671b082fa0 R15: 00007ffc140cd9d8
 </TASK>
task:syz.4.420       state:R  running task     stack:27216 pid: 6012 ppid:  4195 flags:0x0000400c
Call Trace:
 <TASK>
 </TASK>