program: openat(0xffffffffffffff9c, 0x0, 0x0, 0x72) prlimit64(0x0, 0xe, &(0x7f0000000140)={0x8, 0x88}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000240)=0x7) r0 = getpid() sched_setscheduler(r0, 0x2, &(0x7f0000000200)=0x7) mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0xb635773f06ebbeee, 0x8031, 0xffffffffffffffff, 0x0) socketpair$unix(0x1, 0x2, 0x0, &(0x7f0000000200)={0xffffffffffffffff, 0xffffffffffffffff}) connect$unix(r1, &(0x7f000057eff8)=@abs, 0x6e) sendmmsg$unix(r2, &(0x7f0000000000), 0x40001e0, 0x0) recvmmsg(r1, &(0x7f00000000c0), 0x10106, 0x2, 0x0) sched_setscheduler(0x0, 0x2, &(0x7f0000000000)=0x6) r3 = bpf$MAP_CREATE(0x0, &(0x7f00000000c0)=@base={0x1b, 0x0, 0x0, 0x8000}, 0x48) bpf$PROG_LOAD(0x5, &(0x7f00000000c0)={0x8, 0xc, &(0x7f0000000440)=ANY=[@ANYBLOB="1800000000000000000000000000000018120000", @ANYRES32=r3, @ANYBLOB="0000000000000000b7080000000000007b8af8ff00000000bfa200000000000007020000f8ffffffb703000008000000b7040000f6000000850000004300000095"], 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, @fallback, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 0x94) r4 = bpf$PROG_LOAD(0x5, &(0x7f00000000c0)={0x1f, 0xc, &(0x7f0000000440)=ANY=[], &(0x7f0000000240)='GPL\x00', 0x0, 0x0, 0x0, 0x0, 0x12, '\x00', 0x0, @fallback, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 0x90) bpf$BPF_GET_PROG_INFO(0xa, &(0x7f0000000740)={r4, 0x0, 0x0}, 0x10) [ 86.028611][ T4675] Bluetooth: hci0: command tx timeout [ 86.359392][ T5338] [ 86.360725][ T5338] ============================= [ 86.363104][ T5338] WARNING: suspicious RCU usage [ 86.365599][ T5338] 6.16.0-syzkaller-02094-g86aa72182095 #0 Not tainted [ 86.369076][ T5338] ----------------------------- [ 86.371260][ T5338] kernel/events/callchain.c:163 suspicious rcu_dereference_check() usage! [ 86.374985][ T5338] [ 86.374985][ T5338] other info that might help us debug this: [ 86.374985][ T5338] [ 86.379712][ T5338] [ 86.379712][ T5338] rcu_scheduler_active = 2, debug_locks = 1 [ 86.383986][ T5338] 1 lock held by syz.0.0/5338: [ 86.386220][ T5338] #0: ffffffff8e13a840 (rcu_read_lock_trace){....}-{0:0}, at: rcu_read_lock_trace+0x38/0x80 [ 86.391085][ T5338] [ 86.391085][ T5338] stack backtrace: [ 86.393810][ T5338] CPU: 0 UID: 0 PID: 5338 Comm: syz.0.0 Not tainted 6.16.0-syzkaller-02094-g86aa72182095 #0 PREEMPT(full) [ 86.393822][ T5338] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 86.393827][ T5338] Call Trace: [ 86.393832][ T5338] [ 86.393838][ T5338] dump_stack_lvl+0x189/0x250 [ 86.393857][ T5338] ? __pfx_dump_stack_lvl+0x10/0x10 [ 86.393872][ T5338] ? __pfx__printk+0x10/0x10 [ 86.393896][ T5338] lockdep_rcu_suspicious+0x140/0x1d0 [ 86.393919][ T5338] get_callchain_entry+0x2b6/0x3c0 [ 86.393986][ T5338] get_perf_callchain+0xa1/0x6b0 [ 86.394003][ T5338] ? __pfx_get_perf_callchain+0x10/0x10 [ 86.394019][ T5338] ? preempt_schedule+0xae/0xc0 [ 86.394063][ T5338] __bpf_get_stack+0x3fc/0xa60 [ 86.394088][ T5338] ? __pfx___bpf_get_stack+0x10/0x10 [ 86.394103][ T5338] ? __lock_acquire+0xab9/0xd20 [ 86.394123][ T5338] bpf_get_stack+0x33/0x50 [ 86.394138][ T5338] ? bpf_prog_d43750871481577d+0x46/0x4e [ 86.394149][ T5338] bpf_get_stack_raw_tp+0x1a9/0x220 [ 86.394167][ T5338] bpf_prog_d43750871481577d+0x46/0x4e [ 86.394176][ T5338] bpf_prog_run_pin_on_cpu+0x6a/0x150 [ 86.394190][ T5338] bpf_prog_test_run_syscall+0x312/0x4b0 [ 86.394202][ T5338] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 86.394213][ T5338] ? __fget_files+0x2a/0x420 [ 86.394224][ T5338] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 86.394243][ T5338] bpf_prog_test_run+0x2c7/0x340 [ 86.394261][ T5338] __sys_bpf+0x4a4/0x860 [ 86.394278][ T5338] ? __pfx___sys_bpf+0x10/0x10 [ 86.394289][ T5338] ? rcu_is_watching+0x15/0xb0 [ 86.394311][ T5338] ? rcu_is_watching+0x15/0xb0 [ 86.394327][ T5338] __x64_sys_bpf+0x7c/0x90 [ 86.394340][ T5338] do_syscall_64+0xfa/0x3b0 [ 86.394353][ T5338] ? lockdep_hardirqs_on+0x9c/0x150 [ 86.394364][ T5338] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 86.394394][ T5338] ? clear_bhb_loop+0x60/0xb0 [ 86.394407][ T5338] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 86.394419][ T5338] RIP: 0033:0x7fecb958e9a9 [ 86.394431][ T5338] Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 [ 86.394441][ T5338] RSP: 002b:00007fecba371038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 86.394456][ T5338] RAX: ffffffffffffffda RBX: 00007fecb97b6160 RCX: 00007fecb958e9a9 [ 86.394463][ T5338] RDX: 0000000000000010 RSI: 0000200000000740 RDI: 000000000000000a [ 86.394469][ T5338] RBP: 00007fecb9610d69 R08: 0000000000000000 R09: 0000000000000000 [ 86.394478][ T5338] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 86.394485][ T5338] R13: 0000000000000000 R14: 00007fecb97b6160 R15: 00007ffca4ad2ae8 [ 86.394503][ T5338] [ 86.764249][ T10] cfg80211: failed to load regulatory.db