program: bpf$ENABLE_STATS(0x20, 0x0, 0x0) bpf$PROG_LOAD(0x5, &(0x7f00000000c0)={0x0, 0xc, &(0x7f0000000440)=ANY=[@ANYBLOB="1800000000000000000000000000000018120000", @ANYRES32, @ANYBLOB="0000000000000000b7080000000000007b8af8ff00000000bfa200000000000007020000f8ffffffb703000008000000b7040000f6000000850000004300000095"], 0x0, 0x0, 0x0, 0x0, 0x41100, 0x0, '\x00', 0x0, @fallback, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0}, 0x94) r0 = bpf$MAP_CREATE(0x0, &(0x7f00000000c0)=ANY=[@ANYBLOB="1b000000000000000000"], 0x48) bpf$PROG_LOAD(0x5, &(0x7f00000000c0)={0x0, 0xc, &(0x7f0000000440)=ANY=[@ANYBLOB="1800000000000000000000000000000018120000", @ANYRES32=r0], 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, @fallback, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 0x94) r1 = bpf$PROG_LOAD(0x5, &(0x7f00000000c0)={0x1f, 0xc, &(0x7f0000000440)=ANY=[], &(0x7f0000000240)='GPL\x00', 0x0, 0x0, 0x0, 0x41100, 0x12, '\x00', 0x0, @fallback, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 0x90) bpf$BPF_GET_PROG_INFO(0xa, &(0x7f0000000740)={r1, 0x0, 0x0}, 0x10) [ 75.057478][ T45] Bluetooth: hci0: command tx timeout [ 75.147888][ T5340] [ 75.149007][ T5340] ============================= [ 75.150996][ T5340] WARNING: suspicious RCU usage [ 75.153043][ T5340] 6.16.0-rc6-syzkaller-00205-gd786aba32000 #0 Not tainted [ 75.156131][ T5340] ----------------------------- [ 75.158394][ T5340] kernel/events/callchain.c:163 suspicious rcu_dereference_check() usage! [ 75.162125][ T5340] [ 75.162125][ T5340] other info that might help us debug this: [ 75.162125][ T5340] [ 75.166747][ T5340] [ 75.166747][ T5340] rcu_scheduler_active = 2, debug_locks = 1 [ 75.170144][ T5340] 1 lock held by syz.0.0/5340: [ 75.172276][ T5340] #0: ffffffff8e13f2c0 (rcu_read_lock_trace){....}-{0:0}, at: rcu_read_lock_trace+0x38/0x80 [ 75.176997][ T5340] [ 75.176997][ T5340] stack backtrace: [ 75.179449][ T5340] CPU: 0 UID: 0 PID: 5340 Comm: syz.0.0 Not tainted 6.16.0-rc6-syzkaller-00205-gd786aba32000 #0 PREEMPT(full) [ 75.179469][ T5340] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 75.179476][ T5340] Call Trace: [ 75.179484][ T5340] [ 75.179492][ T5340] dump_stack_lvl+0x189/0x250 [ 75.179513][ T5340] ? __pfx_dump_stack_lvl+0x10/0x10 [ 75.179528][ T5340] ? __pfx__printk+0x10/0x10 [ 75.179550][ T5340] lockdep_rcu_suspicious+0x140/0x1d0 [ 75.179568][ T5340] get_callchain_entry+0x2b6/0x3c0 [ 75.179731][ T5340] get_perf_callchain+0xa1/0x6b0 [ 75.179746][ T5340] ? __pfx_get_perf_callchain+0x10/0x10 [ 75.179753][ T5340] ? futex_unqueue+0x22/0x240 [ 75.179764][ T5340] ? futex_unqueue+0x211/0x240 [ 75.179772][ T5340] ? __futex_wait+0x1d1/0x3e0 [ 75.179778][ T5340] ? __futex_wait+0x34f/0x3e0 [ 75.179786][ T5340] __bpf_get_stack+0x3fc/0xa60 [ 75.179798][ T5340] ? __pfx___bpf_get_stack+0x10/0x10 [ 75.179806][ T5340] ? __lock_acquire+0xab9/0xd20 [ 75.179820][ T5340] bpf_get_stack+0x33/0x50 [ 75.179829][ T5340] ? bpf_prog_d43750871481577d+0x46/0x4e [ 75.179839][ T5340] bpf_get_stack_raw_tp+0x1a9/0x220 [ 75.179858][ T5340] bpf_prog_d43750871481577d+0x46/0x4e [ 75.179869][ T5340] bpf_prog_run_pin_on_cpu+0xbc/0x150 [ 75.179886][ T5340] bpf_prog_test_run_syscall+0x312/0x4b0 [ 75.179900][ T5340] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 75.179907][ T5340] ? __fget_files+0x2a/0x420 [ 75.179917][ T5340] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 75.179926][ T5340] bpf_prog_test_run+0x2c4/0x340 [ 75.179938][ T5340] __sys_bpf+0x4a4/0x860 [ 75.179948][ T5340] ? __pfx___sys_bpf+0x10/0x10 [ 75.179964][ T5340] ? rcu_is_watching+0x15/0xb0 [ 75.179990][ T5340] ? rcu_is_watching+0x15/0xb0 [ 75.180009][ T5340] __x64_sys_bpf+0x7c/0x90 [ 75.180025][ T5340] do_syscall_64+0xfa/0x3b0 [ 75.180076][ T5340] ? lockdep_hardirqs_on+0x9c/0x150 [ 75.180088][ T5340] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 75.180098][ T5340] ? clear_bhb_loop+0x60/0xb0 [ 75.180113][ T5340] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 75.180124][ T5340] RIP: 0033:0x7fd14c38e9a9 [ 75.180135][ T5340] 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 [ 75.180145][ T5340] RSP: 002b:00007fd14d121038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 75.180157][ T5340] RAX: ffffffffffffffda RBX: 00007fd14c5b5fa0 RCX: 00007fd14c38e9a9 [ 75.180165][ T5340] RDX: 0000000000000010 RSI: 0000200000000740 RDI: 000000000000000a [ 75.180173][ T5340] RBP: 00007fd14c410d69 R08: 0000000000000000 R09: 0000000000000000 [ 75.180179][ T5340] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 75.180185][ T5340] R13: 0000000000000000 R14: 00007fd14c5b5fa0 R15: 00007ffeec514478 [ 75.180204][ T5340]