Warning: Permanently added '10.128.1.17' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 312.398851][ T26] audit: type=1400 audit(1633354594.605:8): avc: denied { execmem } for pid=6545 comm="syz-executor055" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 executing program executing program executing program executing program [ 312.439688][ C0] hrtimer: interrupt took 36754 ns executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 417.880064][ C1] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 417.887131][ C1] (detected by 1, t=10502 jiffies, g=11985, q=18) [ 417.893731][ C1] rcu: All QSes seen, last rcu_preempt kthread activity 8612 (4294978939-4294970327), jiffies_till_next_fqs=1, root ->qsmask 0x0 [ 417.907015][ C1] rcu: rcu_preempt kthread starved for 8612 jiffies! g11985 f0x2 RCU_GP_CLEANUP(7) ->state=0x0 ->cpu=1 [ 417.918048][ C1] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. [ 417.928287][ C1] rcu: RCU grace-period kthread stack dump: [ 417.934182][ C1] task:rcu_preempt state:R running task stack:28952 pid: 14 ppid: 2 flags:0x00004000 [ 417.945443][ C1] Call Trace: [ 417.948728][ C1] __schedule+0x940/0x26f0 [ 417.953347][ C1] ? io_schedule_timeout+0x140/0x140 [ 417.958647][ C1] ? lockdep_hardirqs_on+0x79/0x100 [ 417.963877][ C1] ? preempt_schedule_thunk+0x16/0x18 [ 417.969287][ C1] preempt_schedule_common+0x45/0xc0 [ 417.974585][ C1] preempt_schedule_thunk+0x16/0x18 [ 417.979795][ C1] ? trace_hardirqs_on+0x38/0x1c0 [ 417.984859][ C1] _raw_spin_unlock_irq+0x3c/0x40 [ 417.989993][ C1] rcu_gp_cleanup+0x26c/0xb30 [ 417.994790][ C1] ? force_qs_rnp+0x760/0x760 [ 417.999530][ C1] ? rcu_implicit_dynticks_qs+0x880/0x880 [ 418.005276][ C1] rcu_gp_kthread+0x1ef/0x320 [ 418.010058][ C1] ? rcu_gp_init+0x12a0/0x12a0 [ 418.014840][ C1] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 418.021159][ C1] ? __kthread_parkme+0x15f/0x220 [ 418.026266][ C1] ? rcu_gp_init+0x12a0/0x12a0 [ 418.031050][ C1] kthread+0x3e5/0x4d0 [ 418.035154][ C1] ? set_kthread_struct+0x130/0x130 [ 418.040541][ C1] ret_from_fork+0x1f/0x30 [ 418.045065][ C1] rcu: Stack dump where RCU GP kthread last ran: [ 418.051449][ C1] NMI backtrace for cpu 1 [ 418.055783][ C1] CPU: 1 PID: 6673 Comm: syz-executor055 Not tainted 5.15.0-rc4-syzkaller #0 [ 418.064651][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 418.074732][ C1] Call Trace: [ 418.078451][ C1] [ 418.081315][ C1] dump_stack_lvl+0xcd/0x134 [ 418.085955][ C1] nmi_cpu_backtrace.cold+0x47/0x144 [ 418.091264][ C1] ? lapic_can_unplug_cpu+0x80/0x80 [ 418.096581][ C1] nmi_trigger_cpumask_backtrace+0x1ae/0x220 [ 418.102674][ C1] rcu_check_gp_kthread_starvation.cold+0x1fb/0x200 [ 418.109300][ C1] rcu_sched_clock_irq+0x2125/0x2200 [ 418.114610][ C1] ? rcutree_dead_cpu+0x30/0x30 [ 418.119490][ C1] ? do_raw_spin_unlock+0x171/0x230 [ 418.124762][ C1] ? _raw_spin_unlock_irqrestore+0x3d/0x70 [ 418.130595][ C1] update_process_times+0x16d/0x200 [ 418.136199][ C1] tick_sched_handle+0x9b/0x180 [ 418.141297][ C1] tick_sched_timer+0x1b0/0x2d0 [ 418.146163][ C1] ? get_cpu_iowait_time_us+0x3f0/0x3f0 [ 418.151723][ C1] __hrtimer_run_queues+0x1c0/0xe50 [ 418.156933][ C1] ? hrtimer_sleeper_start_expires+0x80/0x80 [ 418.162926][ C1] ? ktime_get_update_offsets_now+0x3eb/0x5c0 [ 418.169014][ C1] hrtimer_interrupt+0x31c/0x790 [ 418.173969][ C1] __sysvec_apic_timer_interrupt+0x146/0x530 [ 418.179974][ C1] sysvec_apic_timer_interrupt+0x8e/0xc0 [ 418.185627][ C1] [ 418.188562][ C1] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 418.194649][ C1] RIP: 0010:__schedule+0x948/0x26f0 [ 418.199956][ C1] Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 cb 17 00 00 4c 89 ef 4d 89 7c 24 10 4c 89 fe e8 20 8c c9 f7 48 89 c7 e8 38 72 18 f8 <48> 8b 8d 38 ff ff ff 48 b8 00 00 00 00 00 fc ff df 48 c7 04 01 00 [ 418.219584][ C1] RSP: 0018:ffffc900030b77c0 EFLAGS: 00000206 [ 418.225671][ C1] RAX: 0000000000d8a0eb RBX: 0000000000000000 RCX: 1ffffffff1adbf69 [ 418.233656][ C1] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 418.241640][ C1] RBP: ffffc900030b7888 R08: 0000000000000001 R09: 0000000000000001 [ 418.249624][ C1] R10: ffffffff817b5f48 R11: 0000000000000000 R12: ffff8880b9d31ac0 [ 418.257620][ C1] R13: ffff8880b9d32580 R14: 0000000000000001 R15: ffff8880763c4200 [ 418.265604][ C1] ? trace_hardirqs_on+0x38/0x1c0 [ 418.270662][ C1] ? io_schedule_timeout+0x140/0x140 [ 418.275970][ C1] schedule+0xd3/0x270 [ 418.280068][ C1] tty_open+0x885/0x1000 [ 418.284403][ C1] ? tty_init_dev+0x80/0x80 [ 418.288918][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 418.293879][ C1] ? tty_init_dev+0x80/0x80 [ 418.298394][ C1] chrdev_open+0x266/0x770 [ 418.302905][ C1] ? cdev_device_add+0x210/0x210 [ 418.307874][ C1] ? fsnotify_perm.part.0+0x22d/0x620 [ 418.313339][ C1] do_dentry_open+0x4c8/0x11d0 [ 418.318154][ C1] ? cdev_device_add+0x210/0x210 [ 418.323107][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 418.329361][ C1] ? may_open+0x1f6/0x420 [ 418.333759][ C1] path_openat+0x1c9a/0x2740 [ 418.338379][ C1] ? path_lookupat+0x860/0x860 [ 418.343161][ C1] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 418.349156][ C1] do_filp_open+0x1aa/0x400 [ 418.353676][ C1] ? may_open_dev+0xf0/0xf0 [ 418.358196][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 418.363156][ C1] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 418.369413][ C1] ? _find_next_bit+0x1e3/0x260 [ 418.374355][ C1] ? _raw_spin_unlock+0x24/0x40 [ 418.379319][ C1] ? alloc_fd+0x2f0/0x670 [ 418.383727][ C1] do_sys_openat2+0x16d/0x4d0 [ 418.388423][ C1] ? build_open_flags+0x6f0/0x6f0 [ 418.393470][ C1] ? __context_tracking_exit+0xb8/0xe0 [ 418.398947][ C1] ? lock_downgrade+0x6e0/0x6e0 [ 418.403813][ C1] __x64_sys_openat+0x13f/0x1f0 [ 418.408772][ C1] ? __ia32_sys_open+0x1c0/0x1c0 [ 418.413730][ C1] ? syscall_enter_from_user_mode+0x21/0x70 [ 418.419647][ C1] do_syscall_64+0x35/0xb0 [ 418.424072][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 418.429984][ C1] RIP: 0033:0x7f32873feaf9 [ 418.434420][ C1] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 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 b8 ff ff ff f7 d8 64 89 01 48 [ 418.454046][ C1] RSP: 002b:00007f32873b0318 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 418.462657][ C1] RAX: ffffffffffffffda RBX: 00007f32874863e8 RCX: 00007f32873feaf9 [ 418.470641][ C1] RDX: 0000000000000802 RSI: 0000000020000840 RDI: ffffffffffffff9c [ 418.478628][ C1] RBP: 00007f32874863e0 R08: 0000000000000000 R09: 0000000000000000 [ 418.486610][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 7974742f7665642f [ 418.494591][ C1] R13: 00007fff74f6908f R14: 00007f32873b0400 R15: 0000000000022000