program: bpf$ENABLE_STATS(0x20, 0x0, 0x0) r0 = bpf$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) [ 86.596229][ T4662] Bluetooth: hci0: command tx timeout [ 86.856659][ T5316] [ 86.857920][ T5316] ============================= [ 86.860209][ T5316] WARNING: suspicious RCU usage [ 86.862486][ T5316] syzkaller #0 Not tainted [ 86.864920][ T5316] ----------------------------- [ 86.867177][ T5316] kernel/events/callchain.c:163 suspicious rcu_dereference_check() usage! [ 86.871359][ T5316] [ 86.871359][ T5316] other info that might help us debug this: [ 86.871359][ T5316] [ 86.876269][ T5316] [ 86.876269][ T5316] rcu_scheduler_active = 2, debug_locks = 1 [ 86.880007][ T5316] 1 lock held by syz.0.0/5316: [ 86.882289][ T5316] #0: ffffffff8e7604d8 (rcu_tasks_trace_srcu_struct){....}-{0:0}, at: rcu_read_lock_trace+0x25/0x110 [ 86.887483][ T5316] [ 86.887483][ T5316] stack backtrace: [ 86.890277][ T5316] CPU: 0 UID: 0 PID: 5316 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 86.890295][ T5316] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 86.890303][ T5316] Call Trace: [ 86.890311][ T5316] [ 86.890317][ T5316] dump_stack_lvl+0xe8/0x150 [ 86.890341][ T5316] lockdep_rcu_suspicious+0x13f/0x1d0 [ 86.890366][ T5316] get_callchain_entry+0x2b6/0x3c0 [ 86.890387][ T5316] get_perf_callchain+0xd5/0x880 [ 86.890409][ T5316] ? __pfx_get_perf_callchain+0x10/0x10 [ 86.890428][ T5316] ? futex_unqueue+0x22/0x240 [ 86.890444][ T5316] ? futex_unqueue+0x22/0x240 [ 86.890457][ T5316] ? futex_unqueue+0x22/0x240 [ 86.890479][ T5316] __bpf_get_stack+0x445/0xab0 [ 86.890499][ T5316] ? __pfx___bpf_get_stack+0x10/0x10 [ 86.890521][ T5316] bpf_get_stack+0x33/0x50 [ 86.890540][ T5316] ? bpf_prog_aa1f08ea8b241262+0x46/0x4e [ 86.890554][ T5316] bpf_get_stack_raw_tp+0x1a9/0x220 [ 86.890578][ T5316] bpf_prog_aa1f08ea8b241262+0x46/0x4e [ 86.890590][ T5316] bpf_prog_run_pin_on_cpu+0x3b4/0x470 [ 86.890612][ T5316] bpf_prog_test_run_syscall+0x318/0x4c0 [ 86.890631][ T5316] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 86.890644][ T5316] ? __fget_files+0x2a/0x420 [ 86.890665][ T5316] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 86.890681][ T5316] bpf_prog_test_run+0x2c7/0x340 [ 86.890698][ T5316] __sys_bpf+0x643/0x950 [ 86.890722][ T5316] ? __pfx___sys_bpf+0x10/0x10 [ 86.890754][ T5316] ? rcu_is_watching+0x15/0xb0 [ 86.890778][ T5316] __x64_sys_bpf+0x7c/0x90 [ 86.890797][ T5316] do_syscall_64+0x14d/0xf80 [ 86.890824][ T5316] ? trace_irq_disable+0x3b/0x150 [ 86.890845][ T5316] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 86.890859][ T5316] ? clear_bhb_loop+0x40/0x90 [ 86.890875][ T5316] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 86.890889][ T5316] RIP: 0033:0x7f98e359c799 [ 86.890902][ T5316] 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 [ 86.890913][ T5316] RSP: 002b:00007f98e4416028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 86.890927][ T5316] RAX: ffffffffffffffda RBX: 00007f98e3815fa0 RCX: 00007f98e359c799 [ 86.890937][ T5316] RDX: 000000000000000c RSI: 00002000000004c0 RDI: 000000000000000a [ 86.890945][ T5316] RBP: 00007f98e3632bd9 R08: 0000000000000000 R09: 0000000000000000 [ 86.890954][ T5316] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 86.890961][ T5316] R13: 00007f98e3816038 R14: 00007f98e3815fa0 R15: 00007ffe8ab016f8 [ 86.890980][ T5316]