program: r0 = bpf$BPF_PROG_RAW_TRACEPOINT_LOAD(0x5, &(0x7f0000000800)={0x1f, 0x4, &(0x7f00000001c0)=@framed={{}, [@call={0x85, 0x0, 0x0, 0x11}]}, &(0x7f0000000000)='GPL\x00', 0x8, 0x0, 0x0, 0x0, 0x11}, 0x94) bpf$BPF_PROG_TEST_RUN(0xa, &(0x7f0000000500)={r0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x6, 0x0, 0xfffffffd}, 0x39) [ 67.719910][ T5319] [ 67.721206][ T5319] ============================= [ 67.723429][ T5319] WARNING: suspicious RCU usage [ 67.725772][ T5319] 6.16.0-rc4-syzkaller-00013-g66701750d556 #0 Not tainted [ 67.729109][ T5319] ----------------------------- [ 67.731335][ T5319] net/core/netclassid_cgroup.c:24 suspicious rcu_dereference_check() usage! [ 67.735537][ T5319] [ 67.735537][ T5319] other info that might help us debug this: [ 67.735537][ T5319] [ 67.740296][ T5319] [ 67.740296][ T5319] rcu_scheduler_active = 2, debug_locks = 1 [ 67.743991][ T5319] 1 lock held by syz.0.0/5319: [ 67.746272][ T5319] #0: ffffffff8e13f000 (rcu_read_lock_trace){....}-{0:0}, at: rcu_read_lock_trace+0x38/0x80 [ 67.751106][ T5319] [ 67.751106][ T5319] stack backtrace: [ 67.753828][ T5319] CPU: 0 UID: 0 PID: 5319 Comm: syz.0.0 Not tainted 6.16.0-rc4-syzkaller-00013-g66701750d556 #0 PREEMPT(full) [ 67.753844][ T5319] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 67.753852][ T5319] Call Trace: [ 67.753860][ T5319] [ 67.753867][ T5319] dump_stack_lvl+0x189/0x250 [ 67.753892][ T5319] ? __pfx_dump_stack_lvl+0x10/0x10 [ 67.753910][ T5319] ? __pfx__printk+0x10/0x10 [ 67.753926][ T5319] ? print_lock_name+0xde/0x100 [ 67.753943][ T5319] lockdep_rcu_suspicious+0x140/0x1d0 [ 67.753965][ T5319] task_cls_state+0x1a5/0x1d0 [ 67.753982][ T5319] bpf_get_cgroup_classid_curr+0x18/0x60 [ 67.754000][ T5319] bpf_prog_841aec7193f618b3+0x1b/0x21 [ 67.754011][ T5319] bpf_prog_run_pin_on_cpu+0x67/0x150 [ 67.754028][ T5319] bpf_prog_test_run_syscall+0x312/0x4b0 [ 67.754043][ T5319] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 67.754055][ T5319] ? __fget_files+0x2a/0x420 [ 67.754113][ T5319] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 67.754129][ T5319] bpf_prog_test_run+0x2c4/0x340 [ 67.754149][ T5319] __sys_bpf+0x4a4/0x860 [ 67.754166][ T5319] ? __pfx___sys_bpf+0x10/0x10 [ 67.754180][ T5319] ? rcu_is_watching+0x15/0xb0 [ 67.754212][ T5319] ? rcu_is_watching+0x15/0xb0 [ 67.754236][ T5319] __x64_sys_bpf+0x7c/0x90 [ 67.754251][ T5319] do_syscall_64+0xfa/0x3b0 [ 67.754299][ T5319] ? lockdep_hardirqs_on+0x9c/0x150 [ 67.754314][ T5319] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 67.754326][ T5319] ? clear_bhb_loop+0x60/0xb0 [ 67.754341][ T5319] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 67.754353][ T5319] RIP: 0033:0x7f5ea078e929 [ 67.754365][ T5319] 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 [ 67.754375][ T5319] RSP: 002b:00007f5e9cbf5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 67.754388][ T5319] RAX: ffffffffffffffda RBX: 00007f5ea09b5fa0 RCX: 00007f5ea078e929 [ 67.754396][ T5319] RDX: 0000000000000039 RSI: 0000200000000500 RDI: 000000000000000a [ 67.754404][ T5319] RBP: 00007f5ea0810b39 R08: 0000000000000000 R09: 0000000000000000 [ 67.754411][ T5319] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 67.754418][ T5319] R13: 0000000000000000 R14: 00007f5ea09b5fa0 R15: 00007ffe8d2e7d78 [ 67.754434][ T5319] [ 67.888831][ T45] Bluetooth: hci0: command tx timeout