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) [ 73.668091][ T4668] Bluetooth: hci0: command tx timeout [ 73.712445][ T5320] [ 73.713694][ T5320] ============================= [ 73.716649][ T5320] WARNING: suspicious RCU usage [ 73.727562][ T5320] 6.16.0-rc4-syzkaller-00013-g66701750d556 #0 Not tainted [ 73.731503][ T5320] ----------------------------- [ 73.733632][ T5320] net/core/netclassid_cgroup.c:24 suspicious rcu_dereference_check() usage! [ 73.737902][ T5320] [ 73.737902][ T5320] other info that might help us debug this: [ 73.737902][ T5320] [ 73.742210][ T5320] [ 73.742210][ T5320] rcu_scheduler_active = 2, debug_locks = 1 [ 73.745765][ T5320] 1 lock held by syz.0.0/5320: [ 73.748604][ T5320] #0: ffffffff8e13f000 (rcu_read_lock_trace){....}-{0:0}, at: rcu_read_lock_trace+0x38/0x80 [ 73.753569][ T5320] [ 73.753569][ T5320] stack backtrace: [ 73.756553][ T5320] CPU: 0 UID: 0 PID: 5320 Comm: syz.0.0 Not tainted 6.16.0-rc4-syzkaller-00013-g66701750d556 #0 PREEMPT(full) [ 73.756571][ T5320] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 73.756579][ T5320] Call Trace: [ 73.756587][ T5320] [ 73.756595][ T5320] dump_stack_lvl+0x189/0x250 [ 73.756621][ T5320] ? __pfx_dump_stack_lvl+0x10/0x10 [ 73.756638][ T5320] ? __pfx__printk+0x10/0x10 [ 73.756652][ T5320] ? print_lock_name+0xde/0x100 [ 73.756666][ T5320] lockdep_rcu_suspicious+0x140/0x1d0 [ 73.756684][ T5320] task_cls_state+0x1a5/0x1d0 [ 73.756699][ T5320] bpf_get_cgroup_classid_curr+0x18/0x60 [ 73.756715][ T5320] bpf_prog_841aec7193f618b3+0x1b/0x21 [ 73.756726][ T5320] bpf_prog_run_pin_on_cpu+0x67/0x150 [ 73.756741][ T5320] bpf_prog_test_run_syscall+0x312/0x4b0 [ 73.756754][ T5320] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 73.756765][ T5320] ? __fget_files+0x2a/0x420 [ 73.756845][ T5320] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 73.756859][ T5320] bpf_prog_test_run+0x2c4/0x340 [ 73.756877][ T5320] __sys_bpf+0x4a4/0x860 [ 73.756892][ T5320] ? __pfx___sys_bpf+0x10/0x10 [ 73.756904][ T5320] ? rcu_is_watching+0x15/0xb0 [ 73.756938][ T5320] ? rcu_is_watching+0x15/0xb0 [ 73.756959][ T5320] __x64_sys_bpf+0x7c/0x90 [ 73.756973][ T5320] do_syscall_64+0xfa/0x3b0 [ 73.757022][ T5320] ? lockdep_hardirqs_on+0x9c/0x150 [ 73.757037][ T5320] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 73.757047][ T5320] ? clear_bhb_loop+0x60/0xb0 [ 73.757059][ T5320] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 73.757070][ T5320] RIP: 0033:0x7f8aa898e929 [ 73.757081][ T5320] 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 [ 73.757089][ T5320] RSP: 002b:00007f8aa979f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 73.757102][ T5320] RAX: ffffffffffffffda RBX: 00007f8aa8bb5fa0 RCX: 00007f8aa898e929 [ 73.757110][ T5320] RDX: 0000000000000039 RSI: 0000200000000500 RDI: 000000000000000a [ 73.757118][ T5320] RBP: 00007f8aa8a10b39 R08: 0000000000000000 R09: 0000000000000000 [ 73.757124][ T5320] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 73.757131][ T5320] R13: 0000000000000000 R14: 00007f8aa8bb5fa0 R15: 00007ffdffe5ea28 [ 73.757147][ T5320]