Warning: Permanently added '10.128.0.86' (ED25519) to the list of known hosts. 2025/08/29 23:44:40 parsed 1 programs [ 98.534616][ T5239] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 101.659954][ T5256] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 101.693580][ T5256] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 101.732775][ T5256] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 101.782800][ T5256] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 104.674660][ T5256] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 104.674676][ T5256] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 104.674687][ T5256] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 104.674698][ T5256] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 105.304781][ T39] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 105.543201][ T39] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 105.784638][ T39] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 106.035736][ T39] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 110.092740][ T130] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 110.092753][ T130] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 110.110999][ T130] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 110.111012][ T130] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 2025/08/29 23:44:55 executed programs: 0 [ 115.730456][ T5840] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 115.764207][ T5840] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 115.803757][ T5840] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 115.874397][ T5840] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 120.343752][ T5840] netdevsim netdevsim2 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 120.343768][ T5840] netdevsim netdevsim2 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 120.343779][ T5840] netdevsim netdevsim2 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 120.343793][ T5840] netdevsim netdevsim2 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 120.643834][ T39] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 120.643848][ T39] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 120.653604][ T39] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 120.653616][ T39] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 2025/08/29 23:45:05 executed programs: 2 [ 124.218084][ T6603] [ 124.218090][ T6603] ====================================================== [ 124.218092][ T6603] WARNING: possible circular locking dependency detected [ 124.218100][ T6603] syzkaller #0 Not tainted [ 124.218104][ T6603] ------------------------------------------------------ [ 124.218106][ T6603] syz.2.20/6603 is trying to acquire lock: [ 124.218111][ T6603] ffff88813bc1c740 ((softirq_ctrl.lock)){+.+.}-{3:3}, at: __local_bh_disable_ip+0x112/0x1c0 [ 124.218145][ T6603] [ 124.218145][ T6603] but task is already holding lock: [ 124.218147][ T6603] ffff8881073da150 (&group->lock#2){+.+.}-{3:3}, at: snd_pcm_drop+0xaa/0x140 [ 124.218168][ T6603] [ 124.218168][ T6603] which lock already depends on the new lock. [ 124.218168][ T6603] [ 124.218170][ T6603] [ 124.218170][ T6603] the existing dependency chain (in reverse order) is: [ 124.218172][ T6603] [ 124.218172][ T6603] -> #2 (&group->lock#2){+.+.}-{3:3}: [ 124.218181][ T6603] rt_spin_lock+0x26/0xd0 [ 124.218194][ T6603] _snd_pcm_stream_lock_irqsave+0x45/0x50 [ 124.218204][ T6603] snd_pcm_period_elapsed+0x21/0x120 [ 124.218212][ T6603] dummy_hrtimer_callback+0x2e/0x90 [ 124.218223][ T6603] __hrtimer_run_queues+0x251/0x5c0 [ 124.218233][ T6603] hrtimer_run_softirq+0xa5/0x230 [ 124.218243][ T6603] handle_softirqs+0x124/0x360 [ 124.218250][ T6603] run_ksoftirqd+0x5f/0xc0 [ 124.218258][ T6603] smpboot_thread_fn+0x210/0x380 [ 124.218269][ T6603] kthread+0x117/0x140 [ 124.218276][ T6603] ret_from_fork+0x4b/0x60 [ 124.218285][ T6603] ret_from_fork_asm+0x1a/0x30 [ 124.218294][ T6603] [ 124.218294][ T6603] -> #1 (&base->softirq_expiry_lock){+...}-{3:3}: [ 124.218302][ T6603] rt_spin_lock+0x26/0xd0 [ 124.218312][ T6603] hrtimer_run_softirq+0x3c/0x230 [ 124.218322][ T6603] handle_softirqs+0x124/0x360 [ 124.218329][ T6603] __local_bh_enable_ip+0xcf/0x160 [ 124.218336][ T6603] smack_netlbl_add+0xc3/0xe0 [ 124.218346][ T6603] security_socket_post_create+0xa6/0x300 [ 124.218358][ T6603] __sock_create+0x357/0x5f0 [ 124.218366][ T6603] inet_ctl_sock_create+0x4c/0xd0 [ 124.218382][ T6603] igmp_net_init+0x87/0x100 [ 124.218391][ T6603] ops_init+0x1fa/0x350 [ 124.218399][ T6603] register_pernet_operations+0x18f/0x280 [ 124.218408][ T6603] register_pernet_subsys+0x28/0x40 [ 124.218416][ T6603] igmp_mc_init+0x17/0x70 [ 124.218423][ T6603] inet_init+0x2c1/0x3d0 [ 124.218430][ T6603] do_one_initcall+0x104/0x550 [ 124.218438][ T6603] do_initcall_level+0xcb/0x1a0 [ 124.218445][ T6603] do_initcalls+0x69/0xc0 [ 124.218451][ T6603] kernel_init_freeable+0x21a/0x2c0 [ 124.218457][ T6603] kernel_init+0x1b/0x1c0 [ 124.218467][ T6603] ret_from_fork+0x4b/0x60 [ 124.218475][ T6603] ret_from_fork_asm+0x1a/0x30 [ 124.218483][ T6603] [ 124.218483][ T6603] -> #0 ((softirq_ctrl.lock)){+.+.}-{3:3}: [ 124.218491][ T6603] __lock_acquire+0x12bf/0x20d0 [ 124.218502][ T6603] lock_acquire+0xea/0x270 [ 124.218511][ T6603] rt_spin_lock+0x26/0xd0 [ 124.218521][ T6603] __local_bh_disable_ip+0x112/0x1c0 [ 124.218528][ T6603] hrtimer_cancel+0x95/0x100 [ 124.218537][ T6603] dummy_hrtimer_stop+0x3d/0x50 [ 124.218546][ T6603] snd_pcm_do_stop+0x7f/0xa0 [ 124.218553][ T6603] snd_pcm_action+0x8e/0x170 [ 124.218563][ T6603] snd_pcm_drop+0xef/0x140 [ 124.218573][ T6603] snd_pcm_release_substream+0x42/0x1e0 [ 124.218583][ T6603] snd_pcm_oss_release+0x97/0x130 [ 124.218593][ T6603] __fput+0xfa/0x540 [ 124.218602][ T6603] task_work_run+0xec/0x120 [ 124.218610][ T6603] get_signal+0xc1c/0xd90 [ 124.218616][ T6603] arch_do_signal_or_restart+0x98/0x480 [ 124.218625][ T6603] syscall_exit_to_user_mode+0x70/0x120 [ 124.218632][ T6603] do_syscall_64+0xb1/0x180 [ 124.218641][ T6603] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 124.218649][ T6603] [ 124.218649][ T6603] other info that might help us debug this: [ 124.218649][ T6603] [ 124.218650][ T6603] Chain exists of: [ 124.218650][ T6603] (softirq_ctrl.lock) --> &base->softirq_expiry_lock --> &group->lock#2 [ 124.218650][ T6603] [ 124.218661][ T6603] Possible unsafe locking scenario: [ 124.218661][ T6603] [ 124.218663][ T6603] CPU0 CPU1 [ 124.218664][ T6603] ---- ---- [ 124.218666][ T6603] lock(&group->lock#2); [ 124.218671][ T6603] lock(&base->softirq_expiry_lock); [ 124.218675][ T6603] lock(&group->lock#2); [ 124.218680][ T6603] lock((softirq_ctrl.lock)); [ 124.218684][ T6603] [ 124.218684][ T6603] *** DEADLOCK *** [ 124.218684][ T6603] [ 124.218686][ T6603] 3 locks held by syz.2.20/6603: [ 124.218690][ T6603] #0: ffff8881073d9eb0 (&pcm->open_mutex){+.+.}-{4:4}, at: snd_pcm_oss_release+0x7d/0x130 [ 124.218705][ T6603] #1: ffff8881073da150 (&group->lock#2){+.+.}-{3:3}, at: snd_pcm_drop+0xaa/0x140 [ 124.218725][ T6603] #2: ffffffff85a6d948 (rcu_read_lock){....}-{1:3}, at: rt_spin_lock+0x63/0xd0 [ 124.218744][ T6603] [ 124.218744][ T6603] stack backtrace: [ 124.218751][ T6603] CPU: 0 UID: 0 PID: 6603 Comm: syz.2.20 Not tainted syzkaller #0 [ 124.218760][ T6603] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 124.218769][ T6603] Call Trace: [ 124.218772][ T6603] [ 124.218775][ T6603] dump_stack_lvl+0x12a/0x1c0 [ 124.218785][ T6603] print_circular_bug+0x29b/0x2b0 [ 124.218793][ T6603] check_noncircular+0x110/0x130 [ 124.218800][ T6603] __lock_acquire+0x12bf/0x20d0 [ 124.218813][ T6603] ? __local_bh_disable_ip+0x112/0x1c0 [ 124.218821][ T6603] lock_acquire+0xea/0x270 [ 124.218831][ T6603] ? __local_bh_disable_ip+0x112/0x1c0 [ 124.218839][ T6603] ? _raw_spin_unlock_irqrestore+0x42/0xb0 [ 124.218848][ T6603] ? hrtimer_cancel+0x88/0x100 [ 124.218857][ T6603] rt_spin_lock+0x26/0xd0 [ 124.218867][ T6603] ? __local_bh_disable_ip+0x112/0x1c0 [ 124.218875][ T6603] ? hrtimer_cancel+0x88/0x100 [ 124.218884][ T6603] __local_bh_disable_ip+0x112/0x1c0 [ 124.218892][ T6603] hrtimer_cancel+0x95/0x100 [ 124.218901][ T6603] dummy_hrtimer_stop+0x3d/0x50 [ 124.218911][ T6603] snd_pcm_do_stop+0x7f/0xa0 [ 124.218919][ T6603] snd_pcm_action+0x8e/0x170 [ 124.218930][ T6603] snd_pcm_drop+0xef/0x140 [ 124.218940][ T6603] snd_pcm_release_substream+0x42/0x1e0 [ 124.218952][ T6603] snd_pcm_oss_release+0x97/0x130 [ 124.218959][ T6603] ? __pfx_snd_pcm_oss_release+0x10/0x10 [ 124.218967][ T6603] __fput+0xfa/0x540 [ 124.218976][ T6603] task_work_run+0xec/0x120 [ 124.218985][ T6603] get_signal+0xc1c/0xd90 [ 124.218992][ T6603] ? vfs_write+0x48e/0x670 [ 124.219003][ T6603] arch_do_signal_or_restart+0x98/0x480 [ 124.219014][ T6603] syscall_exit_to_user_mode+0x70/0x120 [ 124.219022][ T6603] do_syscall_64+0xb1/0x180 [ 124.219031][ T6603] ? clear_bhb_loop+0x35/0x90 [ 124.219040][ T6603] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 124.219047][ T6603] RIP: 0033:0x7fe3b4a5ebe9 [ 124.219054][ T6603] 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 [ 124.219063][ T6603] RSP: 002b:00007fe3b48cf038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 124.219070][ T6603] RAX: 0000000000009ae1 RBX: 00007fe3b4c85fa0 RCX: 00007fe3b4a5ebe9 [ 124.219075][ T6603] RDX: 000000000000fc36 RSI: 0000200000000500 RDI: 0000000000000003 [ 124.219079][ T6603] RBP: 00007fe3b4ae1e19 R08: 0000000000000000 R09: 0000000000000000 [ 124.219084][ T6603] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 124.219088][ T6603] R13: 00007fe3b4c86038 R14: 00007fe3b4c85fa0 R15: 00007ffc04ba2098 [ 124.219094][ T6603] 2025/08/29 23:45:10 executed programs: 8 2025/08/29 23:45:15 executed programs: 14