program: bpf$ENABLE_STATS(0x20, 0x0, 0x0) r0 = bpf$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) [ 85.236477][ T4691] Bluetooth: hci0: command tx timeout [ 85.323498][ T5348] [ 85.324886][ T5348] ============================= [ 85.327048][ T5348] WARNING: suspicious RCU usage [ 85.329302][ T5348] 6.16.0-rc5-syzkaller-00025-gd006330be3f7 #0 Not tainted [ 85.332303][ T5348] ----------------------------- [ 85.334464][ T5348] net/core/netclassid_cgroup.c:24 suspicious rcu_dereference_check() usage! [ 85.338632][ T5348] [ 85.338632][ T5348] other info that might help us debug this: [ 85.338632][ T5348] [ 85.343241][ T5348] [ 85.343241][ T5348] rcu_scheduler_active = 2, debug_locks = 1 [ 85.346712][ T5348] 1 lock held by syz.0.0/5348: [ 85.348789][ T5348] #0: ffffffff8e13f340 (rcu_read_lock_trace){....}-{0:0}, at: rcu_read_lock_trace+0x38/0x80 [ 85.353626][ T5348] [ 85.353626][ T5348] stack backtrace: [ 85.356317][ T5348] CPU: 0 UID: 0 PID: 5348 Comm: syz.0.0 Not tainted 6.16.0-rc5-syzkaller-00025-gd006330be3f7 #0 PREEMPT(full) [ 85.356335][ T5348] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 85.356342][ T5348] Call Trace: [ 85.356350][ T5348] [ 85.356356][ T5348] dump_stack_lvl+0x189/0x250 [ 85.356377][ T5348] ? __pfx_dump_stack_lvl+0x10/0x10 [ 85.356392][ T5348] ? __pfx__printk+0x10/0x10 [ 85.356409][ T5348] ? print_lock_name+0xde/0x100 [ 85.356426][ T5348] lockdep_rcu_suspicious+0x140/0x1d0 [ 85.356443][ T5348] task_cls_state+0x1a5/0x1d0 [ 85.356461][ T5348] bpf_get_cgroup_classid_curr+0x18/0x60 [ 85.356473][ T5348] bpf_prog_841aec7193f618b3+0x1b/0x21 [ 85.356484][ T5348] bpf_prog_run_pin_on_cpu+0xbc/0x150 [ 85.356501][ T5348] bpf_prog_test_run_syscall+0x312/0x4b0 [ 85.356516][ T5348] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 85.356530][ T5348] ? __fget_files+0x2a/0x420 [ 85.356598][ T5348] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 85.356615][ T5348] bpf_prog_test_run+0x2c7/0x340 [ 85.356630][ T5348] __sys_bpf+0x4a4/0x860 [ 85.356642][ T5348] ? __pfx___sys_bpf+0x10/0x10 [ 85.356651][ T5348] ? rcu_is_watching+0x15/0xb0 [ 85.356674][ T5348] ? rcu_is_watching+0x15/0xb0 [ 85.356692][ T5348] __x64_sys_bpf+0x7c/0x90 [ 85.356709][ T5348] do_syscall_64+0xfa/0x3b0 [ 85.356753][ T5348] ? lockdep_hardirqs_on+0x9c/0x150 [ 85.356772][ T5348] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 85.356785][ T5348] ? clear_bhb_loop+0x60/0xb0 [ 85.356824][ T5348] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 85.356836][ T5348] RIP: 0033:0x7fce4e98e929 [ 85.356850][ T5348] 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 [ 85.356859][ T5348] RSP: 002b:00007fce4f851038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 85.356872][ T5348] RAX: ffffffffffffffda RBX: 00007fce4ebb5fa0 RCX: 00007fce4e98e929 [ 85.356881][ T5348] RDX: 0000000000000039 RSI: 0000200000000500 RDI: 000000000000000a [ 85.356889][ T5348] RBP: 00007fce4ea10b39 R08: 0000000000000000 R09: 0000000000000000 [ 85.356895][ T5348] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 85.356902][ T5348] R13: 0000000000000000 R14: 00007fce4ebb5fa0 R15: 00007ffc46fa39b8 [ 85.356920][ T5348]