program: bpf$PROG_LOAD(0x5, 0x0, 0x0) prlimit64(0x0, 0xe, &(0x7f0000000140)={0x8, 0x8b}, 0x0) r0 = openat$sndtimer(0xffffffffffffff9c, 0x0, 0x0) ioctl$SNDRV_TIMER_IOCTL_NEXT_DEVICE(r0, 0xc0145401, 0x0) sched_setscheduler(0x0, 0x2, &(0x7f0000000080)=0x8) r1 = getpid() sched_setscheduler(r1, 0x1, &(0x7f0000000200)=0x7) mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0xb635773f06ebbeee, 0x8031, 0xffffffffffffffff, 0x0) socketpair$unix(0x1, 0x2, 0x0, &(0x7f00000000c0)={0xffffffffffffffff, 0xffffffffffffffff}) connect$unix(r2, &(0x7f000057eff8)=@abs, 0x6e) sendmmsg$unix(r3, &(0x7f0000000000), 0x651, 0x0) recvmmsg(r2, &(0x7f00000000c0), 0x10106, 0x2, 0x0) r4 = bpf$MAP_CREATE(0x0, &(0x7f00000000c0)=@base={0x1b, 0x0, 0x0, 0x8000, 0x0, 0xffffffffffffffff, 0x0, '\x00', 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, @void, @value, @void, @value}, 0x48) bpf$PROG_LOAD(0x5, &(0x7f00000000c0)={0x0, 0xc, &(0x7f0000000440)=ANY=[@ANYBLOB="1800000000000000000000000000000018120000", @ANYRES32=r4, @ANYBLOB="0000000000000000b7080000000000007b8af8ff00000000bfa200000000000007020000f8ffffffb703000008000000b7040000f6000000850000004300000095"], 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) r5 = bpf$PROG_LOAD(0x5, &(0x7f00000000c0)={0x1f, 0xc, &(0x7f0000000440)=ANY=[], &(0x7f0000000240)='GPL\x00', 0x0, 0x0, 0x0, 0x0, 0x1a, '\x00', 0x0, @fallback, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @void, @value}, 0x90) bpf$PROG_BIND_MAP(0xa, &(0x7f00000004c0)={r5}, 0xc) [ 75.496674][ T5300] Bluetooth: hci0: command tx timeout [ 75.874663][ T5318] [ 75.875842][ T5318] ============================= [ 75.877699][ T5318] WARNING: suspicious RCU usage [ 75.884754][ T5318] 6.15.0-rc4-syzkaller-00256-g95d3481af6dc #0 Not tainted [ 75.887654][ T5318] ----------------------------- [ 75.889653][ T5318] kernel/events/callchain.c:163 suspicious rcu_dereference_check() usage! [ 75.893033][ T5318] [ 75.893033][ T5318] other info that might help us debug this: [ 75.893033][ T5318] [ 75.896907][ T5318] [ 75.896907][ T5318] rcu_scheduler_active = 2, debug_locks = 1 [ 75.900857][ T5318] 1 lock held by syz.0.0/5318: [ 75.903105][ T5318] #0: ffffffff8df3ba40 (rcu_read_lock_trace){....}-{0:0}, at: rcu_read_lock_trace+0x38/0x80 [ 75.907942][ T5318] [ 75.907942][ T5318] stack backtrace: [ 75.910783][ T5318] CPU: 0 UID: 0 PID: 5318 Comm: syz.0.0 Not tainted 6.15.0-rc4-syzkaller-00256-g95d3481af6dc #0 PREEMPT(full) [ 75.910802][ T5318] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 75.910810][ T5318] Call Trace: [ 75.910816][ T5318] [ 75.910823][ T5318] dump_stack_lvl+0x189/0x250 [ 75.910846][ T5318] ? __pfx_dump_stack_lvl+0x10/0x10 [ 75.910862][ T5318] ? __pfx__printk+0x10/0x10 [ 75.910879][ T5318] lockdep_rcu_suspicious+0x140/0x1d0 [ 75.910898][ T5318] get_callchain_entry+0x2b6/0x3c0 [ 75.910915][ T5318] get_perf_callchain+0xa1/0x6b0 [ 75.910933][ T5318] ? __pfx_get_perf_callchain+0x10/0x10 [ 75.910952][ T5318] ? schedule+0x16f/0x360 [ 75.910966][ T5318] __bpf_get_stack+0x3fc/0xa60 [ 75.910988][ T5318] ? __pfx___bpf_get_stack+0x10/0x10 [ 75.911004][ T5318] ? __lock_acquire+0xaac/0xd20 [ 75.911020][ T5318] bpf_get_stack+0x33/0x50 [ 75.911032][ T5318] ? bpf_prog_d43750871481577d+0x46/0x4a [ 75.911043][ T5318] bpf_get_stack_raw_tp+0x195/0x220 [ 75.911058][ T5318] bpf_prog_d43750871481577d+0x46/0x4a [ 75.911068][ T5318] bpf_prog_run_pin_on_cpu+0x67/0x150 [ 75.911083][ T5318] bpf_prog_test_run_syscall+0x312/0x4b0 [ 75.911097][ T5318] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 75.911108][ T5318] ? __fget_files+0x2a/0x420 [ 75.911183][ T5318] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 75.911196][ T5318] bpf_prog_test_run+0x2a9/0x340 [ 75.911213][ T5318] __sys_bpf+0x4a4/0x860 [ 75.911227][ T5318] ? __pfx___sys_bpf+0x10/0x10 [ 75.911238][ T5318] ? rcu_is_watching+0x15/0xb0 [ 75.911263][ T5318] ? rcu_is_watching+0x15/0xb0 [ 75.911283][ T5318] __x64_sys_bpf+0x7c/0x90 [ 75.911295][ T5318] do_syscall_64+0xf6/0x210 [ 75.911309][ T5318] ? clear_bhb_loop+0x45/0xa0 [ 75.911324][ T5318] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 75.911335][ T5318] RIP: 0033:0x7f048398e969 [ 75.911359][ T5318] 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 [ 75.911368][ T5318] RSP: 002b:00007f047fdb3038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 75.911381][ T5318] RAX: ffffffffffffffda RBX: 00007f0483bb6160 RCX: 00007f048398e969 [ 75.911389][ T5318] RDX: 000000000000000c RSI: 00002000000004c0 RDI: 000000000000000a [ 75.911396][ T5318] RBP: 00007f0483a10ab1 R08: 0000000000000000 R09: 0000000000000000 [ 75.911402][ T5318] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 75.911408][ T5318] R13: 0000000000000000 R14: 00007f0483bb6160 R15: 00007ffddc3c8528 [ 75.911424][ T5318] [ 76.386914][ T1311] ieee802154 phy0 wpan0: encryption failed: -22 [ 76.389687][ T1311] ieee802154 phy1 wpan1: encryption failed: -22