=============================
WARNING: suspicious RCU usage
syzkaller #0 Not tainted
-----------------------------
kernel/events/callchain.c:163 suspicious rcu_dereference_check() usage!

other info that might help us debug this:


rcu_scheduler_active = 2, debug_locks = 1
1 lock held by syz.2.2174/14384:
 #0: ffffffff8e95ced8 (rcu_tasks_trace_srcu_struct){....}-{0:0}, at: __bpf_prog_test_run_raw_tp+0x1ba/0xa00

stack backtrace:
CPU: 1 UID: 0 PID: 14384 Comm: syz.2.2174 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150
 lockdep_rcu_suspicious+0x13f/0x1d0
 get_callchain_entry+0x2b6/0x3c0
 get_perf_callchain+0xd5/0x880
 __bpf_get_stack+0x445/0xab0
 bpf_get_stack+0x33/0x50
 bpf_get_stack_raw_tp+0x1a9/0x220
 bpf_prog_e8e6327ccf46c9a7+0x46/0x4e
 __bpf_prog_test_run_raw_tp+0x329/0xa00
 bpf_prog_test_run_raw_tp+0x4c8/0x7e0
 bpf_prog_test_run+0x2c7/0x340
 __sys_bpf+0xa20/0xd90
 __x64_sys_bpf+0xba/0xd0
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ffb5a59ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffb5b3ce028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007ffb5a815fa0 RCX: 00007ffb5a59ce59
RDX: 0000000000000010 RSI: 0000200000000740 RDI: 000000000000000a
RBP: 00007ffb5a632d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffb5a816038 R14: 00007ffb5a815fa0 R15: 00007ffde499fd78
 </TASK>
