Warning: Permanently added '10.128.1.202' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 311.131960][ T25] audit: type=1400 audit(1634800703.548:8): avc: denied { execmem } for pid=6543 comm="syz-executor388" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 311.157728][ C1] hrtimer: interrupt took 39207 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 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 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 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 [ 417.682066][ C1] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 417.689087][ C1] (detected by 1, t=10502 jiffies, g=12141, q=53) [ 417.695598][ C1] rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294978926-4294968424), jiffies_till_next_fqs=1, root ->qsmask 0x0 [ 417.708975][ C1] rcu: rcu_preempt kthread starved for 10502 jiffies! g12141 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 417.720177][ C1] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. [ 417.730753][ C1] rcu: RCU grace-period kthread stack dump: [ 417.736723][ C1] task:rcu_preempt state:R running task stack:28952 pid: 14 ppid: 2 flags:0x00004000 [ 417.747509][ C1] Call Trace: [ 417.750788][ C1] __schedule+0xb44/0x5960 [ 417.755320][ C1] ? _raw_spin_unlock_irqrestore+0x50/0x70 [ 417.761140][ C1] ? __mod_timer+0x83c/0xe30 [ 417.765821][ C1] ? run_timer_softirq+0x160/0x1d0 [ 417.770950][ C1] ? io_schedule_timeout+0x140/0x140 [ 417.776247][ C1] ? debug_object_destroy+0x210/0x210 [ 417.781697][ C1] schedule+0xd3/0x270 [ 417.785776][ C1] schedule_timeout+0x14a/0x2a0 [ 417.790640][ C1] ? usleep_range+0x170/0x170 [ 417.795326][ C1] ? destroy_timer_on_stack+0x20/0x20 [ 417.800717][ C1] ? btrfs_check_node.cold+0x110/0x15e [ 417.806276][ C1] ? _raw_spin_unlock_irqrestore+0x3d/0x70 [ 417.812098][ C1] ? prepare_to_swait_event+0xee/0x470 [ 417.817645][ C1] rcu_gp_fqs_loop+0x186/0x800 [ 417.822453][ C1] ? force_qs_rnp+0x760/0x760 [ 417.827139][ C1] ? rcu_gp_init+0x906/0x12a0 [ 417.831845][ C1] rcu_gp_kthread+0x1de/0x320 [ 417.836551][ C1] ? rcu_gp_init+0x12a0/0x12a0 [ 417.841331][ C1] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 417.847633][ C1] ? __kthread_parkme+0x15f/0x220 [ 417.852716][ C1] ? rcu_gp_init+0x12a0/0x12a0 [ 417.857495][ C1] kthread+0x3e5/0x4d0 [ 417.861577][ C1] ? set_kthread_struct+0x130/0x130 [ 417.866811][ C1] ret_from_fork+0x1f/0x30 [ 417.871264][ C1] rcu: Stack dump where RCU GP kthread last ran: [ 417.877632][ C1] Sending NMI from CPU 1 to CPUs 0: [ 417.882841][ C0] NMI backtrace for cpu 0 [ 417.882851][ C0] CPU: 0 PID: 6984 Comm: syz-executor388 Not tainted 5.15.0-rc6-syzkaller #0 [ 417.882873][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 417.882885][ C0] RIP: 0010:lock_acquire+0x1d3/0x510 [ 417.882959][ C0] Code: ff ff 48 c7 c7 20 e9 8b 89 48 83 c4 20 e8 85 0e db 07 b8 ff ff ff ff 65 0f c1 05 48 96 a6 7e 83 f8 01 0f 85 b4 02 00 00 9c 58 c4 02 0f 85 9f 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 [ 417.882978][ C0] RSP: 0018:ffffc90000007c20 EFLAGS: 00000046 [ 417.882995][ C0] RAX: 0000000000000046 RBX: 1ffff92000000f86 RCX: ffffffff815b111f [ 417.883009][ C0] RDX: 1ffff1100e69759b RSI: 0000000000010002 RDI: 0000000000000000 [ 417.883023][ C0] RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8fd059e7 [ 417.883036][ C0] R10: fffffbfff1fa0b3c R11: 0000000000000000 R12: 0000000000000000 [ 417.883050][ C0] R13: 0000000000000000 R14: ffffffff904c3b88 R15: 0000000000000000 [ 417.883063][ C0] FS: 00007f94b8679700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 417.883084][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 417.883098][ C0] CR2: 00007fffa1e15c48 CR3: 0000000023e50000 CR4: 00000000003506f0 [ 417.883112][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 417.883129][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 417.883143][ C0] Call Trace: [ 417.883148][ C0] [ 417.883154][ C0] ? lock_release+0x720/0x720 [ 417.883176][ C0] ? __perf_event_overflow+0x3d0/0x3d0 [ 417.883237][ C0] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 417.883262][ C0] _raw_spin_lock_irqsave+0x39/0x50 [ 417.883289][ C0] ? debug_object_activate+0x12e/0x3e0 [ 417.883316][ C0] debug_object_activate+0x12e/0x3e0 [ 417.883342][ C0] ? debug_object_assert_init+0x2e0/0x2e0 [ 417.883368][ C0] ? lock_release+0x720/0x720 [ 417.883390][ C0] ? do_raw_spin_lock+0x120/0x2b0 [ 417.883413][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 417.883437][ C0] enqueue_hrtimer+0x27/0x3e0 [ 417.883458][ C0] __hrtimer_run_queues+0xb02/0xe50 [ 417.883479][ C0] ? hrtimer_sleeper_start_expires+0x80/0x80 [ 417.883501][ C0] ? ktime_get_update_offsets_now+0x3eb/0x5c0 [ 417.883527][ C0] hrtimer_interrupt+0x31c/0x790 [ 417.883548][ C0] __sysvec_apic_timer_interrupt+0x146/0x530 [ 417.883598][ C0] sysvec_apic_timer_interrupt+0x8e/0xc0 [ 417.883632][ C0] [ 417.883638][ C0] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 417.883691][ C0] RIP: 0010:tty_lookup_driver+0xa7/0x550 [ 417.883743][ C0] Code: 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 81 04 00 00 49 8d 7c 24 30 41 8b 6c 24 2c 48 89 f8 48 c1 e8 03 42 0f b6 04 30 e5 14 84 c0 74 08 3c 03 0f 8e 52 04 00 00 41 0b 6c 24 30 89 df [ 417.883762][ C0] RSP: 0018:ffffc90003697888 EFLAGS: 00000a06 [ 417.883778][ C0] RAX: 0000000000000000 RBX: 0000000000400043 RCX: 0000000000000000 [ 417.883791][ C0] RDX: 0000000000000000 RSI: ffffffff842f184b RDI: ffff88801e667d30 [ 417.883805][ C0] RBP: 00000000000001fd R08: 0000000000400043 R09: ffffffff842f1805 [ 417.883819][ C0] R10: ffffffff842f18a4 R11: 0000000000400043 R12: ffff88801e667d00 [ 417.883833][ C0] R13: ffffc90003697928 R14: dffffc0000000000 R15: ffff88801bb34d00 [ 417.883848][ C0] ? tty_lookup_driver+0xc4/0x550 [ 417.883870][ C0] ? tty_lookup_driver+0x25/0x550 [ 417.883892][ C0] ? tty_lookup_driver+0x6b/0x550 [ 417.883914][ C0] ? tty_lookup_driver+0x6b/0x550 [ 417.883936][ C0] tty_open+0x56d/0x1000 [ 417.883957][ C0] ? tty_init_dev+0x80/0x80 [ 417.883978][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 417.884002][ C0] ? tty_init_dev+0x80/0x80 [ 417.884023][ C0] chrdev_open+0x266/0x770 [ 417.884071][ C0] ? cdev_device_add+0x210/0x210 [ 417.884095][ C0] ? fsnotify_perm.part.0+0x22d/0x620 [ 417.884151][ C0] do_dentry_open+0x4c8/0x11d0 [ 417.884192][ C0] ? cdev_device_add+0x210/0x210 [ 417.884216][ C0] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 417.884242][ C0] ? may_open+0x1f6/0x420 [ 417.884283][ C0] path_openat+0x1c9a/0x2740 [ 417.884307][ C0] ? path_lookupat+0x860/0x860 [ 417.884329][ C0] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 417.884354][ C0] do_filp_open+0x1aa/0x400 [ 417.884377][ C0] ? may_open_dev+0xf0/0xf0 [ 417.884400][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 417.884423][ C0] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 417.884449][ C0] ? _find_next_bit+0x1e3/0x260 [ 417.884472][ C0] ? _raw_spin_unlock+0x24/0x40 [ 417.884497][ C0] ? alloc_fd+0x2f0/0x670 [ 417.884529][ C0] do_sys_openat2+0x16d/0x4d0 [ 417.884555][ C0] ? build_open_flags+0x6f0/0x6f0 [ 417.884581][ C0] ? __context_tracking_exit+0xb8/0xe0 [ 417.884607][ C0] ? lock_downgrade+0x6e0/0x6e0 [ 417.884629][ C0] __x64_sys_openat+0x13f/0x1f0 [ 417.884655][ C0] ? __ia32_sys_open+0x1c0/0x1c0 [ 417.884682][ C0] ? syscall_enter_from_user_mode+0x21/0x70 [ 417.884709][ C0] do_syscall_64+0x35/0xb0 [ 417.884729][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 417.884758][ C0] RIP: 0033:0x7f94b86c7af9 [ 417.884779][ C0] 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 [ 417.884799][ C0] RSP: 002b:00007f94b8679318 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 417.884818][ C0] RAX: ffffffffffffffda RBX: 00007f94b874f3e8 RCX: 00007f94b86c7af9 [ 417.884833][ C0] RDX: 0000000000000802 RSI: 0000000020000840 RDI: ffffffffffffff9c [ 417.884847][ C0] RBP: 00007f94b874f3e0 R08: 0000000000000000 R09: 0000000000000000 [ 417.884860][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 7974742f7665642f [ 417.884873][ C0] R13: 00007fffa1e15bef R14: 00007f94b8679400 R15: 0000000000022000 [ 417.884890][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.049 msecs