program: r0 = bpf$MAP_CREATE(0x0, &(0x7f00000002c0)=@base={0x1b, 0x0, 0x0, 0x8000, 0x0, 0xffffffffffffffff, 0x0, '\x00', 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, @void, @value, @void, @value}, 0x50) bpf$PROG_LOAD(0x5, &(0x7f00000000c0)={0x0, 0xc, &(0x7f0000000440)=ANY=[@ANYBLOB="1800000000000000000000000000000018120000", @ANYRES32=r0, @ANYBLOB="0000000000000000b7080000000000007b8af8ff00000000bfa200000000000007020000f8ffffffb703000008000000b704000002010000850000004300000095"], 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, @fallback, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @void, @value}, 0x90) r1 = bpf$PROG_LOAD(0x5, &(0x7f00000000c0)={0x1f, 0xc, &(0x7f0000000440)=ANY=[], &(0x7f0000000240)='GPL\x00', 0x0, 0x0, 0x0, 0x0, 0x12, '\x00', 0x0, @fallback, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @void, @value}, 0x90) bpf$BPF_GET_PROG_INFO(0xa, &(0x7f0000000740)={r1, 0x0, 0x0}, 0x10) [ 140.399970][ T4656] Bluetooth: hci0: command tx timeout [ 140.443560][ T5332] [ 140.445503][ T5332] ============================= [ 140.454115][ T5332] WARNING: suspicious RCU usage [ 140.460293][ T5332] 6.15.0-rc7-syzkaller-00082-g5cdb2c77c4c3 #0 Not tainted [ 140.463063][ T5332] ----------------------------- [ 140.465005][ T5332] kernel/events/callchain.c:163 suspicious rcu_dereference_check() usage! [ 140.468952][ T5332] [ 140.468952][ T5332] other info that might help us debug this: [ 140.468952][ T5332] [ 140.473264][ T5332] [ 140.473264][ T5332] rcu_scheduler_active = 2, debug_locks = 1 [ 140.476663][ T5332] 1 lock held by syz.0.0/5332: [ 140.478934][ T5332] #0: ffffffff8df3e0c0 (rcu_read_lock_trace){....}-{0:0}, at: rcu_read_lock_trace+0x38/0x80 [ 140.483516][ T5332] [ 140.483516][ T5332] stack backtrace: [ 140.486108][ T5332] CPU: 0 UID: 0 PID: 5332 Comm: syz.0.0 Not tainted 6.15.0-rc7-syzkaller-00082-g5cdb2c77c4c3 #0 PREEMPT(full) [ 140.486125][ T5332] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 140.486133][ T5332] Call Trace: [ 140.486141][ T5332] [ 140.486146][ T5332] dump_stack_lvl+0x189/0x250 [ 140.486173][ T5332] ? __pfx_dump_stack_lvl+0x10/0x10 [ 140.486190][ T5332] ? __pfx__printk+0x10/0x10 [ 140.486212][ T5332] lockdep_rcu_suspicious+0x140/0x1d0 [ 140.486232][ T5332] get_callchain_entry+0x2b6/0x3c0 [ 140.486252][ T5332] get_perf_callchain+0xa1/0x6b0 [ 140.486271][ T5332] ? __pfx_get_perf_callchain+0x10/0x10 [ 140.486289][ T5332] ? preempt_schedule+0xae/0xc0 [ 140.486303][ T5332] __bpf_get_stack+0x3fc/0xa60 [ 140.486326][ T5332] ? __pfx___bpf_get_stack+0x10/0x10 [ 140.486342][ T5332] ? __lock_acquire+0xaac/0xd20 [ 140.486359][ T5332] bpf_get_stack+0x33/0x50 [ 140.486371][ T5332] ? bpf_prog_b8a90dd1efcc4ad9+0x46/0x4e [ 140.486381][ T5332] bpf_get_stack_raw_tp+0x195/0x220 [ 140.486398][ T5332] bpf_prog_b8a90dd1efcc4ad9+0x46/0x4e [ 140.486408][ T5332] bpf_prog_run_pin_on_cpu+0x67/0x150 [ 140.486426][ T5332] bpf_prog_test_run_syscall+0x312/0x4b0 [ 140.486440][ T5332] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 140.486449][ T5332] ? __fget_files+0x2a/0x420 [ 140.486498][ T5332] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 140.486507][ T5332] bpf_prog_test_run+0x2a9/0x340 [ 140.486522][ T5332] __sys_bpf+0x4a4/0x860 [ 140.486536][ T5332] ? __pfx___sys_bpf+0x10/0x10 [ 140.486546][ T5332] ? rcu_is_watching+0x15/0xb0 [ 140.486565][ T5332] ? rcu_is_watching+0x15/0xb0 [ 140.486579][ T5332] __x64_sys_bpf+0x7c/0x90 [ 140.486592][ T5332] do_syscall_64+0xf6/0x210 [ 140.486608][ T5332] ? clear_bhb_loop+0x60/0xb0 [ 140.486622][ T5332] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 140.486633][ T5332] RIP: 0033:0x7fe8b658e969 [ 140.486643][ T5332] 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 [ 140.486649][ T5332] RSP: 002b:00007fe8b7480038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 140.486658][ T5332] RAX: ffffffffffffffda RBX: 00007fe8b67b5fa0 RCX: 00007fe8b658e969 [ 140.486663][ T5332] RDX: 0000000000000010 RSI: 0000200000000740 RDI: 000000000000000a [ 140.486667][ T5332] RBP: 00007fe8b6610ab1 R08: 0000000000000000 R09: 0000000000000000 [ 140.486672][ T5332] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 140.486676][ T5332] R13: 0000000000000000 R14: 00007fe8b67b5fa0 R15: 00007ffe65301248 [ 140.486687][ T5332]