program: bpf$PROG_LOAD(0x5, &(0x7f0000000500)={0x6, 0xc, &(0x7f0000000440)=ANY=[@ANYBLOB="180000000000000000000000fdffffde18000000", @ANYRES32, @ANYBLOB="0000000000000000b7080000000000007b8af8ff00000000bfa200000000000007020000f8ffffffb703000008000000b704000000000000850000004300000095"], 0x0, 0x0, 0x0, 0x0, 0x41000, 0x0, '\x00', 0x0, @fallback=0x2d, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 0x94) r0 = bpf$PROG_LOAD(0x5, &(0x7f00000000c0)={0x1f, 0xc, &(0x7f0000000440)=ANY=[], &(0x7f0000000180)='GPL\x00', 0x0, 0x0, 0x0, 0x0, 0x1a, '\x00', 0x0, @fallback, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 0x90) bpf$PROG_BIND_MAP(0xa, &(0x7f00000004c0)={r0}, 0xc) [ 93.385393][ T4640] Bluetooth: hci0: command tx timeout [ 93.398595][ T1125] cfg80211: failed to load regulatory.db [ 93.494147][ T5313] [ 93.496073][ T5313] ============================= [ 93.499057][ T5313] WARNING: suspicious RCU usage [ 93.501570][ T5313] syzkaller #0 Not tainted [ 93.503535][ T5313] ----------------------------- [ 93.505772][ T5313] kernel/events/callchain.c:163 suspicious rcu_dereference_check() usage! [ 93.509602][ T5313] [ 93.509602][ T5313] other info that might help us debug this: [ 93.509602][ T5313] [ 93.514052][ T5313] [ 93.514052][ T5313] rcu_scheduler_active = 2, debug_locks = 1 [ 93.517548][ T5313] locks held by syz.0.0/5313: 1, last CPU#0: [ 93.520320][ T5313] #0: ffffffff8ed5cb18 (rcu_tasks_trace_srcu_struct){....}-{0:0}, at: rcu_read_lock_trace+0x25/0x110 [ 93.525077][ T5313] [ 93.525077][ T5313] stack backtrace: [ 93.527562][ T5313] CPU: 0 UID: 0 PID: 5313 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 93.531327][ T5313] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 93.535607][ T5313] Call Trace: [ 93.537140][ T5313] [ 93.538460][ T5313] dump_stack_lvl+0xe8/0x150 [ 93.540447][ T5313] lockdep_rcu_suspicious+0x140/0x1d0 [ 93.542649][ T5313] get_callchain_entry+0x2b7/0x3c0 [ 93.544860][ T5313] get_perf_callchain+0xd5/0x880 [ 93.546935][ T5313] ? __pfx_get_perf_callchain+0x10/0x10 [ 93.549353][ T5313] ? __lock_acquire+0x747/0x2de0 [ 93.551395][ T5313] __bpf_get_stack+0x375/0xae0 [ 93.553411][ T5313] ? __pfx___bpf_get_stack+0x10/0x10 [ 93.555769][ T5313] ? __lock_acquire+0x747/0x2de0 [ 93.557727][ T5313] ? lock_acquire+0x115/0x350 [ 93.559757][ T5313] ? bpf_prog_42db8cfdf50901c9+0x46/0x4e [ 93.561883][ T5313] bpf_get_stack_raw_tp+0x1a4/0x210 [ 93.563845][ T5313] bpf_prog_42db8cfdf50901c9+0x46/0x4e [ 93.565924][ T5313] bpf_prog_run_pin_on_cpu+0x14f/0x4c0 [ 93.568121][ T5313] bpf_prog_test_run_syscall+0x324/0x4c0 [ 93.570250][ T5313] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 93.572710][ T5313] ? __fget_files+0x2a/0x420 [ 93.574508][ T5313] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 93.577151][ T5313] bpf_prog_test_run+0x2c5/0x340 [ 93.579459][ T5313] __sys_bpf+0xa22/0xda0 [ 93.581342][ T5313] ? __pfx___sys_bpf+0x10/0x10 [ 93.583462][ T5313] ? do_futex+0x458/0x4e0 [ 93.585470][ T5313] ? rcu_is_watching+0x16/0xb0 [ 93.587622][ T5313] __x64_sys_bpf+0xba/0xd0 [ 93.589488][ T5313] do_syscall_64+0x166/0x520 [ 93.591371][ T5313] ? trace_irq_disable+0x3b/0x140 [ 93.593494][ T5313] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 93.596128][ T5313] ? clear_bhb_loop+0x70/0xc0 [ 93.598136][ T5313] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 93.600671][ T5313] RIP: 0033:0x7fa79c19e159 [ 93.602580][ T5313] 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 [ 93.610604][ T5313] RSP: 002b:00007fa79cff7fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 93.614016][ T5313] RAX: ffffffffffffffda RBX: 00007fa79c425fa0 RCX: 00007fa79c19e159 [ 93.617284][ T5313] RDX: 000000000000000c RSI: 00002000000004c0 RDI: 000000000000000a [ 93.620667][ T5313] RBP: 00007fa79c23506b R08: 0000000000000000 R09: 0000000000000000 [ 93.623992][ T5313] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 93.627303][ T5313] R13: 00007fa79c426038 R14: 00007fa79c425fa0 R15: 00007fffc0cda588 [ 93.630946][ T5313]