program: bpf$ENABLE_STATS(0x20, 0x0, 0x0) bpf$PROG_LOAD(0x5, 0x0, 0x0) r0 = bpf$MAP_CREATE(0x0, &(0x7f00000009c0)=ANY=[@ANYBLOB="1b00000000000000000000000080"], 0x48) bpf$PROG_LOAD(0x5, &(0x7f00000000c0)={0x0, 0xc, &(0x7f0000000440)=ANY=[@ANYBLOB="1800000000000000000000000000000018120000", @ANYRES32=r0, @ANYBLOB="0000000000000000b7080000000000007b8af8ff00000000bfa200000000000007020000f8ffffffb703000008000000b704000002010000850000004300000095"], 0x0, 0x400000, 0x0, 0x0, 0x41100, 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}, 0xc) [ 102.006235][ T4656] Bluetooth: hci0: command tx timeout [ 102.060687][ T5331] [ 102.062818][ T5331] ============================= [ 102.065142][ T5331] WARNING: suspicious RCU usage [ 102.067254][ T5331] syzkaller #0 Not tainted [ 102.069047][ T5331] ----------------------------- [ 102.071148][ T5331] kernel/events/callchain.c:163 suspicious rcu_dereference_check() usage! [ 102.074810][ T5331] [ 102.074810][ T5331] other info that might help us debug this: [ 102.074810][ T5331] [ 102.078934][ T5331] [ 102.078934][ T5331] rcu_scheduler_active = 2, debug_locks = 1 [ 102.082007][ T5331] 1 lock held by syz.0.0/5331: [ 102.083920][ T5331] #0: ffffffff8e95cf18 (rcu_tasks_trace_srcu_struct){....}-{0:0}, at: rcu_read_lock_trace+0x25/0x110 [ 102.088613][ T5331] [ 102.088613][ T5331] stack backtrace: [ 102.091256][ T5331] CPU: 0 UID: 0 PID: 5331 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 102.091272][ T5331] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 102.091297][ T5331] Call Trace: [ 102.091304][ T5331] [ 102.091312][ T5331] dump_stack_lvl+0xe8/0x150 [ 102.091330][ T5331] lockdep_rcu_suspicious+0x13f/0x1d0 [ 102.091347][ T5331] get_callchain_entry+0x2b6/0x3c0 [ 102.091362][ T5331] get_perf_callchain+0xd5/0x880 [ 102.091377][ T5331] ? __pfx_get_perf_callchain+0x10/0x10 [ 102.091391][ T5331] ? __pfx___resched_curr+0x10/0x10 [ 102.091407][ T5331] __bpf_get_stack+0x445/0xab0 [ 102.091429][ T5331] ? __pfx___bpf_get_stack+0x10/0x10 [ 102.091450][ T5331] ? __lock_acquire+0x6b5/0x2cf0 [ 102.091465][ T5331] bpf_get_stack+0x33/0x50 [ 102.091473][ T5331] ? bpf_prog_e8e6327ccf46c9a7+0x46/0x4e [ 102.091483][ T5331] bpf_get_stack_raw_tp+0x1a9/0x220 [ 102.091501][ T5331] bpf_prog_e8e6327ccf46c9a7+0x46/0x4e [ 102.091513][ T5331] bpf_prog_run_pin_on_cpu+0x3b4/0x470 [ 102.091533][ T5331] bpf_prog_test_run_syscall+0x318/0x4c0 [ 102.091552][ T5331] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 102.091567][ T5331] ? __fget_files+0x2a/0x420 [ 102.091582][ T5331] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 102.091598][ T5331] bpf_prog_test_run+0x2c7/0x340 [ 102.091612][ T5331] __sys_bpf+0x643/0x950 [ 102.091628][ T5331] ? __pfx___sys_bpf+0x10/0x10 [ 102.091655][ T5331] ? rcu_is_watching+0x15/0xb0 [ 102.091670][ T5331] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 102.091683][ T5331] __x64_sys_bpf+0x7c/0x90 [ 102.091704][ T5331] do_syscall_64+0x174/0x580 [ 102.091733][ T5331] ? trace_irq_disable+0x3b/0x140 [ 102.091744][ T5331] ? clear_bhb_loop+0x40/0x90 [ 102.091757][ T5331] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 102.091765][ T5331] RIP: 0033:0x7f97abd9ce59 [ 102.091774][ T5331] 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 [ 102.091781][ T5331] RSP: 002b:00007f97acccefe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 102.091790][ T5331] RAX: ffffffffffffffda RBX: 00007f97ac015fa0 RCX: 00007f97abd9ce59 [ 102.091795][ T5331] RDX: 000000000000000c RSI: 00002000000004c0 RDI: 000000000000000a [ 102.091800][ T5331] RBP: 00007f97abe32d6f R08: 0000000000000000 R09: 0000000000000000 [ 102.091805][ T5331] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 102.091809][ T5331] R13: 00007f97ac016038 R14: 00007f97ac015fa0 R15: 00007ffecc92e918 [ 102.091820][ T5331]