syzkaller
syzkaller login: [ 35.939834][ T1069] cgroup: Unknown subsys name 'net'
[ 35.941282][ T1069] cgroup: Unknown subsys name 'net_prio'
[ 35.943591][ T1069] cgroup: Unknown subsys name 'devices'
[ 35.945616][ T1069] cgroup: Unknown subsys name 'blkio'
[ 36.006683][ T1075] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k
[ 36.033000][ T1069] cgroup: Unknown subsys name 'hugetlb'
[ 36.038667][ T1069] cgroup: Unknown subsys name 'rlimit'
[ 37.235693][ T1122] syz-executor.0 (1122) used greatest stack depth: 11712 bytes left
Warning: Permanently added '10.128.1.38' (ED25519) to the list of known hosts.
2025/03/31 00:11:25 ignoring optional flag "sandboxArg"="0"
2025/03/31 00:11:25 ignoring optional flag "type"="gce"
2025/03/31 00:11:25 parsed 1 programs
[ 55.728207][ T2009] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k
[ 56.824306][ T2054] syz-executor.0 (2054) used greatest stack depth: 11664 bytes left
2025/03/31 00:11:26 executed programs: 0
[ 158.091969][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU
[ 158.098695][ C1] rcu: 1-...!: (10000 ticks this GP) idle=687/1/0x4000000000000000 softirq=4832/4832 fqs=40
[ 158.108953][ C1] (t=10002 jiffies g=1613 q=98)
[ 158.113862][ C1] rcu: rcu_preempt kthread timer wakeup didn't happen for 9922 jiffies! g1613 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
[ 158.125975][ C1] rcu: Possible timer handling issue on cpu=0 timer-softirq=745
[ 158.133673][ C1] rcu: rcu_preempt kthread starved for 9925 jiffies! g1613 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
[ 158.144937][ C1] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
[ 158.155236][ C1] rcu: RCU grace-period kthread stack dump:
[ 158.161200][ C1] task:rcu_preempt state:I stack:14336 pid: 13 ppid: 2 flags:0x00004000
[ 158.170856][ C1] Call Trace:
[ 158.174119][ C1]
[ 158.177029][ C1] __schedule+0x378/0x13e0
[ 158.181509][ C1] ? __mod_timer+0x1a0/0x3c0
[ 158.186071][ C1] schedule+0x68/0xb0
[ 158.190022][ C1] schedule_timeout+0xaf/0x140
[ 158.194777][ C1] ? destroy_timer_on_stack+0x10/0x10
[ 158.200120][ C1] rcu_gp_fqs_loop+0xfd/0x370
[ 158.205473][ C1] ? rcu_gp_init+0x5b0/0x5b0
[ 158.210049][ C1] rcu_gp_kthread+0x89/0xf0
[ 158.214522][ C1] kthread+0x124/0x150
[ 158.218560][ C1] ? set_kthread_struct+0x40/0x40
[ 158.223766][ C1] ret_from_fork+0x1f/0x30
[ 158.228259][ C1]
[ 158.231254][ C1] rcu: Stack dump where RCU GP kthread last ran:
[ 158.237558][ C1] Sending NMI from CPU 1 to CPUs 0:
[ 158.242840][ C0] NMI backtrace for cpu 0
[ 158.242845][ C0] CPU: 0 PID: 2924 Comm: syz-executor.0 Not tainted 5.15.179-syzkaller #0
[ 158.242849][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
[ 158.242852][ C0] RIP: 0010:__pv_queued_spin_lock_slowpath+0xe4/0x2c0
[ 158.242860][ C0] Code: 14 41 bd 01 00 00 00 41 be 00 01 00 00 3c 02 0f 94 c0 0f b6 c0 48 89 04 24 c6 43 14 00 ba 00 80 00 00 c6 45 01 01 eb 0b f3 90 <83> ea 01 0f 84 66 01 00 00 0f b6 45 00 84 c0 75 ed 44 89 f0 f0 66
[ 158.242863][ C0] RSP: 0018:ffffc9000327fdb0 EFLAGS: 00000206
[ 158.242866][ C0] RAX: 0000000000000003 RBX: ffff88813bc2c780 RCX: 0000000000000008
[ 158.242868][ C0] RDX: 000000000000514d RSI: 0000000000000003 RDI: ffff888105fa2608
[ 158.242869][ C0] RBP: ffff888105fa2608 R08: ffff88823ffee300 R09: 0000000000000000
[ 158.242871][ C0] R10: ffff88813bc2c780 R11: 0000000000000001 R12: 0000000000000000
[ 158.242873][ C0] R13: 0000000000000001 R14: 0000000000000100 R15: 0000000000040000
[ 158.242875][ C0] FS: 000055556a330480(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000
[ 158.242877][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 158.242879][ C0] CR2: 0000000020005000 CR3: 000000010715a000 CR4: 00000000003506f0
[ 158.242884][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 158.242886][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 158.242887][ C0] Call Trace:
[ 158.242890][ C0]
[ 158.242892][ C0] ? nmi_cpu_backtrace.cold+0x1c/0x80
[ 158.242897][ C0] ? nmi_cpu_backtrace_handler+0x8/0x10
[ 158.242902][ C0] ? nmi_handle+0xb5/0x160
[ 158.242906][ C0] ? default_do_nmi+0x42/0x240
[ 158.242910][ C0] ? exc_nmi+0xe6/0x110
[ 158.242912][ C0] ? end_repeat_nmi+0x16/0x31
[ 158.242918][ C0] ? __pv_queued_spin_lock_slowpath+0xe4/0x2c0
[ 158.242920][ C0] ? __pv_queued_spin_lock_slowpath+0xe4/0x2c0
[ 158.242923][ C0] ? __pv_queued_spin_lock_slowpath+0xe4/0x2c0
[ 158.242925][ C0]
[ 158.242926][ C0]
[ 158.242927][ C0] do_raw_spin_lock+0x99/0xa0
[ 158.242929][ C0] lock_sock_nested+0x36/0x60
[ 158.242934][ C0] ? tipc_release+0x3b/0x5c0
[ 158.242939][ C0] tipc_release+0x3b/0x5c0
[ 158.242944][ C0] ? __sock_release+0x28/0xa0
[ 158.242947][ C0] __sock_release+0x32/0xa0
[ 158.242950][ C0] sock_close+0xf/0x20
[ 158.242952][ C0] __fput+0x8f/0x250
[ 158.242958][ C0] task_work_run+0x54/0x80
[ 158.242962][ C0] exit_to_user_mode_prepare+0x15d/0x160
[ 158.242968][ C0] syscall_exit_to_user_mode+0x12/0x30
[ 158.242972][ C0] do_syscall_64+0x40/0x80
[ 158.242975][ C0] entry_SYSCALL_64_after_hwframe+0x66/0xd0
[ 158.242979][ C0] RIP: 0033:0x7f888a725dda
[ 158.242985][ C0] Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 03 7f 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 63 7f 02 00 8b 44 24
[ 158.242987][ C0] RSP: 002b:00007ffda03b5680 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 158.242990][ C0] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007f888a725dda
[ 158.242991][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
[ 158.242993][ C0] RBP: 00007f888a857980 R08: 0000001b2fa60000 R09: 00007ffda03ee080
[ 158.242994][ C0] R10: 00007ffda03ee090 R11: 0000000000000293 R12: 000000000000e5ec
[ 158.242996][ C0] R13: 00007f888a85605c R14: 00007f888a856050 R15: 0000000000000032
[ 158.242998][ C0]
[ 158.243842][ C1] NMI backtrace for cpu 1
[ 158.581033][ C1] CPU: 1 PID: 2925 Comm: syz-executor.0 Not tainted 5.15.179-syzkaller #0
[ 158.589614][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
[ 158.599884][ C1] Call Trace:
[ 158.603256][ C1]
[ 158.606165][ C1] dump_stack_lvl+0x41/0x5e
[ 158.610752][ C1] nmi_cpu_backtrace.cold+0x32/0x80
[ 158.615928][ C1] ? lapic_can_unplug_cpu+0x80/0x80
[ 158.621109][ C1] nmi_trigger_cpumask_backtrace+0x91/0xb0
[ 158.626889][ C1] rcu_dump_cpu_stacks+0xa5/0xd3
[ 158.631884][ C1] rcu_sched_clock_irq.cold+0x1ca/0x441
[ 158.637402][ C1] ? find_held_lock+0x2b/0x80
[ 158.642140][ C1] ? scheduler_tick+0xe8/0x150
[ 158.646888][ C1] ? find_held_lock+0x2b/0x80
[ 158.651539][ C1] ? tick_sched_timer+0x15/0x70
[ 158.656365][ C1] update_process_times+0x87/0xc0
[ 158.661448][ C1] tick_sched_handle+0x1d/0x50
[ 158.666178][ C1] tick_sched_timer+0x5c/0x70
[ 158.670822][ C1] ? tick_sched_do_timer+0xf0/0xf0
[ 158.675897][ C1] __hrtimer_run_queues+0x138/0x330
[ 158.681154][ C1] hrtimer_interrupt+0x109/0x230
[ 158.686063][ C1] __sysvec_apic_timer_interrupt+0x63/0x130
[ 158.691932][ C1] sysvec_apic_timer_interrupt+0x65/0x90
[ 158.697535][ C1]
[ 158.700438][ C1]
[ 158.703347][ C1] asm_sysvec_apic_timer_interrupt+0x16/0x20
[ 158.709311][ C1] RIP: 0010:lock_acquire+0x2f/0x150
[ 158.714494][ C1] Code: 89 ce 41 55 41 89 d5 41 54 41 89 f4 55 48 89 fd 53 4c 89 cb 0f 1f 44 00 00 65 8b 05 eb e1 f4 7e 89 c0 48 0f a3 05 01 40 53 02 <0f> 82 ef 00 00 00 8b 15 71 71 53 02 85 d2 74 7b 65 8b 05 1a 45 f5
[ 158.734255][ C1] RSP: 0018:ffffc900032d7658 EFLAGS: 00000247
[ 158.740304][ C1] RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000002
[ 158.748253][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff83377200
[ 158.758583][ C1] RBP: ffffffff83377200 R08: 0000000000000000 R09: 0000000000000000
[ 158.766536][ C1] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
[ 158.774493][ C1] R13: 0000000000000000 R14: 0000000000000002 R15: ffff88810962db00
[ 158.782481][ C1] tipc_sk_lookup+0x89/0x1e0
[ 158.787048][ C1] ? rcvbuf_limit.isra.0+0x70/0x70
[ 158.792126][ C1] tipc_sk_rcv+0xb7/0x8f0
[ 158.796425][ C1] ? unwind_next_frame+0x4a8/0x6d0
[ 158.801506][ C1] ? find_held_lock+0x2b/0x80
[ 158.806255][ C1] ? lockdep_init_map_type+0x49/0x150
[ 158.811613][ C1] tipc_node_xmit+0xc3/0x410
[ 158.816181][ C1] ? tipc_buf_acquire+0x1a/0x50
[ 158.821012][ C1] ? kfree+0xe6/0x4b0
[ 158.824963][ C1] tipc_node_xmit_skb+0x34/0x50
[ 158.829792][ C1] tipc_sk_rcv+0x72b/0x8f0
[ 158.834179][ C1] ? find_held_lock+0x2b/0x80
[ 158.838834][ C1] ? lockdep_init_map_type+0x49/0x150
[ 158.844172][ C1] tipc_node_xmit+0xc3/0x410
[ 158.848732][ C1] ? find_held_lock+0x2b/0x80
[ 158.853381][ C1] ? finish_task_switch.isra.0+0xb0/0x240
[ 158.859071][ C1] tipc_sk_push_backlog+0x94/0x190
[ 158.864154][ C1] tipc_sk_filter_rcv+0x22f/0xed0
[ 158.869206][ C1] ? tipc_sk_rcv+0x1a2/0x8f0
[ 158.873855][ C1] tipc_sk_rcv+0x405/0x8f0
[ 158.878257][ C1] ? find_held_lock+0x2b/0x80
[ 158.882901][ C1] ? lockdep_init_map_type+0x49/0x150
[ 158.888260][ C1] tipc_node_xmit+0xc3/0x410
[ 158.893127][ C1] ? tipc_sk_filter_rcv+0xb0e/0xed0
[ 158.898297][ C1] ? tipc_sendstream+0x37/0x50
[ 158.903131][ C1] tipc_node_distr_xmit+0xac/0xe0
[ 158.908126][ C1] tipc_sk_backlog_rcv+0x53/0x80
[ 158.913036][ C1] ? do_raw_spin_unlock+0x50/0xa0
[ 158.918044][ C1] __release_sock+0x54/0xd0
[ 158.922519][ C1] release_sock+0x26/0xa0
[ 158.926818][ C1] tipc_release+0x37f/0x5c0
[ 158.931310][ C1] __sock_release+0x32/0xa0
[ 158.935799][ C1] sock_close+0xf/0x20
[ 158.939861][ C1] __fput+0x8f/0x250
[ 158.943875][ C1] task_work_run+0x54/0x80
[ 158.948351][ C1] exit_to_user_mode_prepare+0x15d/0x160
[ 158.954398][ C1] syscall_exit_to_user_mode+0x12/0x30
[ 158.959848][ C1] do_syscall_64+0x40/0x80
[ 158.964244][ C1] entry_SYSCALL_64_after_hwframe+0x66/0xd0
[ 158.970225][ C1] RIP: 0033:0x7f888a726ee9
[ 158.974623][ C1] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
[ 158.994351][ C1] RSP: 002b:00007f888a2a90c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[ 159.002736][ C1] RAX: 00000000000203a0 RBX: 00007f888a855f80 RCX: 00007f888a726ee9
[ 159.010700][ C1] RDX: 0000000000000000 RSI: 00000000200003c0 RDI: 0000000000000003
[ 159.018645][ C1] RBP: 00007f888a77349e R08: 0000000000000000 R09: 0000000000000000
[ 159.026611][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 159.034601][ C1] R13: 0000000000000006 R14: 00007f888a855f80 R15: 00007ffda03b55b8
[ 159.042729][ C1]