program: syz_clone(0x40221400, &(0x7f0000000600)="704c50ef87847d62216f769c0449db59f205e92c09c68f7216aec3a56a9a0aa6e8dc546fa5d2f9e5d620bf0b76086616a308e05d56477f48efa2867212707e341cefc6da9a992ce93c1203af6b23ec1cd33a9498a05ecb01abb2dd15d8eba2c8e254fee6fed8684e28ce152f450eb891510c0941df093c760e5037f3cc5f89d7f992f3eb6cbfbf7b26518cd5f7284063c562b3b78f8d5471ad828dd3ecaff21f04bac7b3496770e80ffa42afa408e40014d23e2f72f2c904111ea37787dd411b4a9cf44674a8313df767be7b988b78a02c4ffb9cda0ba584a754ed", 0xdb, 0x0, 0x0, 0x0) r0 = bpf$MAP_CREATE(0x0, &(0x7f0000001440)=ANY=[@ANYBLOB="1b00000000000000000000000080"], 0x48) bpf$PROG_LOAD(0x5, &(0x7f00000000c0)={0x0, 0xc, &(0x7f0000000440)=ANY=[@ANYBLOB="1800000000000000000000000000000018120000", @ANYRES32=r0, @ANYBLOB="0000000000000000b7080000000000007b8af8ff00000000bfa200000000000007020000f8ffffffb703000008000000b7040000f6000000850000004300000095"], 0x0, 0x0, 0x0, 0x0, 0x40f00, 0x0, '\x00', 0x0, @fallback, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 0x94) r1 = bpf$PROG_LOAD(0x5, &(0x7f00000000c0)={0x1f, 0xc, &(0x7f0000000440)=ANY=[], &(0x7f0000000240)='GPL\x00', 0x0, 0x0, 0x0, 0x0, 0x1a, '\x00', 0x0, @fallback, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 0x90) bpf$PROG_BIND_MAP(0xa, &(0x7f00000004c0)={r1, 0xffffffffffffffff, 0x2000000}, 0xc) [ 84.154274][ T5304] Bluetooth: hci0: command tx timeout [ 84.343627][ T5330] [ 84.345069][ T5330] ============================= [ 84.347529][ T5330] WARNING: suspicious RCU usage [ 84.349859][ T5330] syzkaller #0 Not tainted [ 84.351934][ T5330] ----------------------------- [ 84.355099][ T5330] kernel/events/callchain.c:163 suspicious rcu_dereference_check() usage! [ 84.359586][ T5330] [ 84.359586][ T5330] other info that might help us debug this: [ 84.359586][ T5330] [ 84.365228][ T5330] [ 84.365228][ T5330] rcu_scheduler_active = 2, debug_locks = 1 [ 84.369060][ T5330] 1 lock held by syz.0.0/5330: [ 84.371112][ T5330] #0: ffffffff8e75e718 (rcu_tasks_trace_srcu_struct){....}-{0:0}, at: rcu_read_lock_trace+0x25/0x110 [ 84.376679][ T5330] [ 84.376679][ T5330] stack backtrace: [ 84.380424][ T5330] CPU: 0 UID: 0 PID: 5330 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 84.380446][ T5330] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 84.380457][ T5330] Call Trace: [ 84.380468][ T5330] [ 84.380476][ T5330] dump_stack_lvl+0xe8/0x150 [ 84.380510][ T5330] lockdep_rcu_suspicious+0x13f/0x1d0 [ 84.380536][ T5330] get_callchain_entry+0x2b6/0x3c0 [ 84.380562][ T5330] get_perf_callchain+0xd5/0x880 [ 84.380586][ T5330] ? __pfx_get_perf_callchain+0x10/0x10 [ 84.380605][ T5330] ? futex_unqueue+0x22/0x240 [ 84.380622][ T5330] ? futex_unqueue+0x22/0x240 [ 84.380634][ T5330] ? futex_unqueue+0x22/0x240 [ 84.380653][ T5330] __bpf_get_stack+0x445/0xab0 [ 84.380674][ T5330] ? __pfx___bpf_get_stack+0x10/0x10 [ 84.380700][ T5330] bpf_get_stack+0x33/0x50 [ 84.380715][ T5330] ? bpf_prog_aa1f08ea8b241262+0x46/0x4e [ 84.380731][ T5330] bpf_get_stack_raw_tp+0x1a9/0x220 [ 84.380756][ T5330] bpf_prog_aa1f08ea8b241262+0x46/0x4e [ 84.380771][ T5330] bpf_prog_run_pin_on_cpu+0x142/0x470 [ 84.380800][ T5330] bpf_prog_test_run_syscall+0x318/0x4c0 [ 84.380823][ T5330] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 84.380844][ T5330] ? __fget_files+0x2a/0x420 [ 84.380863][ T5330] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 84.380886][ T5330] bpf_prog_test_run+0x2c7/0x340 [ 84.380901][ T5330] __sys_bpf+0x643/0x950 [ 84.380922][ T5330] ? __pfx___sys_bpf+0x10/0x10 [ 84.380975][ T5330] ? rcu_is_watching+0x15/0xb0 [ 84.381002][ T5330] __x64_sys_bpf+0x7c/0x90 [ 84.381025][ T5330] do_syscall_64+0x14d/0xf80 [ 84.381039][ T5330] ? trace_irq_disable+0x3b/0x150 [ 84.381061][ T5330] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 84.381077][ T5330] ? clear_bhb_loop+0x40/0x90 [ 84.381092][ T5330] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 84.381105][ T5330] RIP: 0033:0x7f293a99c799 [ 84.381121][ T5330] 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 [ 84.381134][ T5330] RSP: 002b:00007f293b7d6fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 84.381149][ T5330] RAX: ffffffffffffffda RBX: 00007f293ac16090 RCX: 00007f293a99c799 [ 84.381159][ T5330] RDX: 000000000000000c RSI: 00002000000004c0 RDI: 000000000000000a [ 84.381168][ T5330] RBP: 00007f293aa32c99 R08: 0000000000000000 R09: 0000000000000000 [ 84.381176][ T5330] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 84.381184][ T5330] R13: 00007f293ac16128 R14: 00007f293ac16090 R15: 00007fff6d005038 [ 84.381204][ T5330]