program: syz_clone(0x61801680, 0x0, 0x1f, 0x0, 0x0, 0x0) perf_event_open(&(0x7f0000000200)={0x2, 0x80, 0xf2, 0x0, 0x0, 0x0, 0x0, 0x0, 0x404, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x4000, 0x0, @perf_config_ext, 0x0, 0x0, 0x3, 0x0, 0x0, 0xffffffff}, 0x0, 0xffffffffffffffff, 0xffffffffffffffff, 0x0) socketpair$unix(0x1, 0x5, 0x0, &(0x7f00000029c0)={0xffffffffffffffff, 0xffffffffffffffff}) sendmsg$inet(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000840)=[{&(0x7f0000000180)="9d4585", 0x3}], 0x1}, 0xc000) r2 = bpf$PROG_LOAD(0x5, &(0x7f0000000180)={0x4, 0x5, &(0x7f0000000000)=ANY=[@ANYBLOB="18020000000019000000000000000080850000009b000000850000000500"], 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, @fallback=0x16, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 0x94) r3 = bpf$MAP_CREATE(0x0, &(0x7f00000008c0)=ANY=[@ANYBLOB="1b00000000000000000000000080"], 0x48) bpf$PROG_LOAD(0x5, &(0x7f0000000540)={0x0, 0xc, &(0x7f0000000440)=ANY=[@ANYBLOB="1800000000000000000000000000000018120000", @ANYRES32=r3, @ANYBLOB="0000000000000000b7080000000000007b8af8ff00000000bfa200000000000007020000f8ffffffb703000008000000b704000002010000850000004300000095"], 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, @fallback=0x17, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x65ed}, 0x94) r4 = bpf$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$BPF_GET_PROG_INFO(0xa, &(0x7f0000000740)={r4, 0x0, 0x0}, 0x10) bpf$BPF_PROG_TEST_RUN(0xa, &(0x7f0000000600)={r2, 0x0, 0x0, 0x0, &(0x7f0000000900), 0x0, 0x6f12, 0x0, 0x0, 0x0, 0x0, 0x0}, 0x50) close(r1) recvmsg$unix(r0, &(0x7f0000000400)={0x0, 0x0, 0x0}, 0x12022) write$cgroup_pressure(0xffffffffffffffff, 0x0, 0x0) bpf$PROG_LOAD(0x5, 0x0, 0x0) r5 = perf_event_open(0x0, 0x0, 0xffefffffffffffff, 0xffffffffffffffff, 0x0) ioctl$PERF_EVENT_IOC_SET_BPF(r5, 0x40042408, 0xffffffffffffffff) syz_clone(0x42164000, 0x0, 0x0, 0x0, 0x0, 0x0) perf_event_open(0x0, 0x0, 0xffbfffffffffffff, 0xffffffffffffffff, 0x9) bpf$MAP_CREATE_CONST_STR(0x0, &(0x7f00000009c0)=ANY=[], 0x50) bpf$PROG_LOAD(0x5, 0x0, 0x0) bpf$PROG_BIND_MAP(0xa, 0x0, 0x0) syz_clone(0x2000400, 0x0, 0xfffffebf, 0x0, 0x0, 0x0) syz_clone(0x2000400, 0x0, 0xfffffebf, 0x0, 0x0, 0x0) syz_clone(0x41980100, 0x0, 0x0, 0x0, 0x0, 0x0) [ 103.238969][ T4654] Bluetooth: hci0: command tx timeout [ 103.591433][ T5329] [ 103.593212][ T5329] ============================= [ 103.595564][ T5329] WARNING: suspicious RCU usage [ 103.597943][ T5329] syzkaller #0 Not tainted [ 103.600298][ T5329] ----------------------------- [ 103.603282][ T5329] kernel/events/callchain.c:163 suspicious rcu_dereference_check() usage! [ 103.607112][ T5329] [ 103.607112][ T5329] other info that might help us debug this: [ 103.607112][ T5329] [ 103.612257][ T5329] [ 103.612257][ T5329] rcu_scheduler_active = 2, debug_locks = 1 [ 103.616726][ T5329] 1 lock held by syz.0.0/5329: [ 103.618987][ T5329] #0: ffffffff8e95cf58 (rcu_tasks_trace_srcu_struct){....}-{0:0}, at: rcu_read_lock_trace+0x25/0x110 [ 103.624961][ T5329] [ 103.624961][ T5329] stack backtrace: [ 103.628260][ T5329] CPU: 0 UID: 0 PID: 5329 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 103.628285][ T5329] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 103.628293][ T5329] Call Trace: [ 103.628302][ T5329] [ 103.628310][ T5329] dump_stack_lvl+0xe8/0x150 [ 103.628334][ T5329] lockdep_rcu_suspicious+0x13f/0x1d0 [ 103.628355][ T5329] get_callchain_entry+0x2b6/0x3c0 [ 103.628374][ T5329] get_perf_callchain+0xd5/0x880 [ 103.628391][ T5329] ? __pfx_get_perf_callchain+0x10/0x10 [ 103.628412][ T5329] __bpf_get_stack+0x445/0xab0 [ 103.628438][ T5329] ? __pfx___bpf_get_stack+0x10/0x10 [ 103.628457][ T5329] ? __lock_acquire+0x6b5/0x2cf0 [ 103.628473][ T5329] bpf_get_stack+0x33/0x50 [ 103.628485][ T5329] ? bpf_prog_e8e6327ccf46c9a7+0x46/0x4e [ 103.628499][ T5329] bpf_get_stack_raw_tp+0x1a9/0x220 [ 103.628520][ T5329] bpf_prog_e8e6327ccf46c9a7+0x46/0x4e [ 103.628533][ T5329] bpf_prog_run_pin_on_cpu+0x142/0x470 [ 103.628554][ T5329] bpf_prog_test_run_syscall+0x318/0x4c0 [ 103.628572][ T5329] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 103.628588][ T5329] ? __fget_files+0x2a/0x420 [ 103.628605][ T5329] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 103.628622][ T5329] bpf_prog_test_run+0x2c7/0x340 [ 103.628638][ T5329] __sys_bpf+0x643/0x950 [ 103.628660][ T5329] ? __pfx___sys_bpf+0x10/0x10 [ 103.628699][ T5329] ? rcu_is_watching+0x15/0xb0 [ 103.628736][ T5329] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 103.628753][ T5329] __x64_sys_bpf+0x7c/0x90 [ 103.628780][ T5329] do_syscall_64+0x15f/0xf80 [ 103.628800][ T5329] ? clear_bhb_loop+0x40/0x90 [ 103.628815][ T5329] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 103.628831][ T5329] RIP: 0033:0x7f56fad9cdd9 [ 103.628845][ T5329] 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 [ 103.628857][ T5329] RSP: 002b:00007f56fbbf5fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 103.628873][ T5329] RAX: ffffffffffffffda RBX: 00007f56fb016090 RCX: 00007f56fad9cdd9 [ 103.628884][ T5329] RDX: 0000000000000010 RSI: 0000200000000740 RDI: 000000000000000a [ 103.628892][ T5329] RBP: 00007f56fae32d69 R08: 0000000000000000 R09: 0000000000000000 [ 103.628901][ T5329] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 103.628909][ T5329] R13: 00007f56fb016128 R14: 00007f56fb016090 R15: 00007ffe811cbef8 [ 103.628933][ T5329] [ 105.302276][ T4654] Bluetooth: hci0: command tx timeout