INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added 'ci-upstream-kasan-gce-8,10.128.0.60' (ECDSA) to the list of known hosts. 2017/09/01 10:18:18 parsed 1 programs 2017/09/01 10:18:18 executed programs: 0 2017/09/01 10:18:23 executed programs: 1318 2017/09/01 10:18:29 executed programs: 2372 2017/09/01 10:18:34 executed programs: 3433 2017/09/01 10:18:39 executed programs: 4533 2017/09/01 10:18:44 executed programs: 5648 2017/09/01 10:18:49 executed programs: 6790 2017/09/01 10:18:54 executed programs: 7917 2017/09/01 10:18:59 executed programs: 9020 2017/09/01 10:19:04 executed programs: 10093 2017/09/01 10:19:09 executed programs: 11157 2017/09/01 10:19:14 executed programs: 12258 2017/09/01 10:19:19 executed programs: 13380 2017/09/01 10:19:24 executed programs: 14478 2017/09/01 10:19:29 executed programs: 15568 2017/09/01 10:19:34 executed programs: 16681 2017/09/01 10:19:39 executed programs: 17780 2017/09/01 10:19:44 executed programs: 18881 2017/09/01 10:19:49 executed programs: 20012 2017/09/01 10:19:54 executed programs: 21137 2017/09/01 10:19:59 executed programs: 22264 syzkaller login: [ 1412.072031] watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [syz-executor5:8514] [ 1412.073217] Modules linked in: [ 1412.073666] irq event stamp: 4618356 [ 1412.074257] hardirqs last enabled at (4618355): [] _raw_spin_unlock_irq+0x27/0x70 [ 1412.075505] hardirqs last disabled at (4618356): [] apic_timer_interrupt+0x8e/0xa0 [ 1412.076743] softirqs last enabled at (4617976): [] __do_softirq+0x7ba/0xba3 [ 1412.077911] softirqs last disabled at (4617969): [] irq_exit+0x1cc/0x200 [ 1412.079163] CPU: 1 PID: 8514 Comm: syz-executor5 Not tainted 4.13.0-rc7+ #61 [ 1412.080172] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1412.081422] task: ffff8801d769e440 task.stack: ffff8801c6388000 [ 1412.082237] RIP: 0010:delay_tsc+0x48/0x70 [ 1412.082792] RSP: 0018:ffff8801c638ef60 EFLAGS: 00000203 ORIG_RAX: ffffffffffffff10 [ 1412.083808] RAX: 000002f5e34fe488 RBX: ffffed0038c4c8f2 RCX: 000002f5e34fb7a7 [ 1412.084763] RDX: 0000000000002ce1 RSI: 0000000000000001 RDI: 00000000000059d9 [ 1412.085747] RBP: ffff8801c638ef60 R08: 0000000000000001 R09: 0000000000000000 [ 1412.086712] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801c638f208 [ 1412.087687] R13: ffff8801c6264780 R14: ffff8801d4415bb0 R15: ffff8801c6264800 [ 1412.088649] FS: 00007f1b91502700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 1412.089727] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1412.090504] CR2: 00000000205a3fcc CR3: 00000001d5ef1000 CR4: 00000000001406e0 [ 1412.091500] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1412.092490] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1412.099732] Call Trace: [ 1412.102299] __const_udelay+0x5b/0x70 [ 1412.106137] snd_timer_close+0x2ee/0xf20 [ 1412.110177] ? check_noncircular+0x20/0x20 [ 1412.114419] ? snd_timer_stop+0x80/0x80 [ 1412.118389] ? mntput_no_expire+0x130/0xa90 [ 1412.123206] ? lock_downgrade+0x990/0x990 [ 1412.127341] ? lock_release+0xa40/0xa40 [ 1412.131298] ? find_held_lock+0x35/0x1d0 [ 1412.135343] ? lock_downgrade+0x990/0x990 [ 1412.139478] ? locks_remove_file+0x414/0x560 [ 1412.143867] ? fcntl_setlk+0x10c0/0x10c0 [ 1412.147905] ? __fsnotify_parent+0xb4/0x3a0 [ 1412.152201] ? fsnotify+0x1af0/0x1af0 [ 1412.155978] ? _raw_spin_unlock+0x22/0x30 [ 1412.160104] ? snd_timer_close+0xf20/0xf20 [ 1412.164312] ? snd_timer_close+0xf20/0xf20 [ 1412.168520] snd_timer_user_release+0x97/0x130 [ 1412.173425] __fput+0x327/0x7e0 [ 1412.176691] ? fput+0x140/0x140 [ 1412.179958] ? check_same_owner+0x320/0x320 [ 1412.184249] ? do_raw_spin_trylock+0x190/0x190 [ 1412.188802] ? check_same_owner+0x320/0x320 [ 1412.193099] ____fput+0x15/0x20 [ 1412.196354] task_work_run+0x18a/0x260 [ 1412.200216] ? task_work_cancel+0x210/0x210 [ 1412.204513] ? _raw_spin_unlock+0x22/0x30 [ 1412.208632] ? switch_task_namespaces+0x87/0xc0 [ 1412.213277] do_exit+0xa3a/0x1b10 [ 1412.216709] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 1412.221868] ? __lock_acquire+0x6ef/0x3dc0 [ 1412.226075] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 1412.231244] ? trace_hardirqs_on+0xd/0x10 [ 1412.235372] ? mm_update_next_owner+0x930/0x930 [ 1412.240031] ? __lock_acquire+0x6ef/0x3dc0 [ 1412.244242] ? print_usage_bug+0x480/0x480 [ 1412.248474] ? __mutex_unlock_slowpath+0x2ef/0xac0 [ 1412.253388] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 1412.258593] ? get_mdev+0x67/0x80 [ 1412.262056] ? snd_seq_ioctl_unsubscribe_port+0x2c0/0x2c0 [ 1412.267587] ? wake_up_q+0x8a/0xe0 [ 1412.271103] ? check_noncircular+0x20/0x20 [ 1412.275319] ? check_noncircular+0x20/0x20 [ 1412.279537] ? __mutex_unlock_slowpath+0x2f8/0xac0 [ 1412.284457] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 1412.289551] ? wait_for_completion+0x730/0x730 [ 1412.294127] ? __lock_acquire+0x6ef/0x3dc0 [ 1412.298348] ? get_mdev+0x67/0x80 [ 1412.301785] ? find_held_lock+0x35/0x1d0 [ 1412.305827] ? get_signal+0x855/0x17e0 [ 1412.309688] ? lock_downgrade+0x990/0x990 [ 1412.313829] do_group_exit+0x149/0x400 [ 1412.317691] ? __lock_is_held+0xb6/0x140 [ 1412.321734] ? SyS_exit+0x30/0x30 [ 1412.325160] ? _raw_spin_unlock_irq+0x27/0x70 [ 1412.329628] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 1412.334622] get_signal+0x7e8/0x17e0 [ 1412.338335] ? ptrace_notify+0x130/0x130 [ 1412.342377] ? is_bpf_text_address+0xa4/0x120 [ 1412.346845] ? __kernel_text_address+0xae/0xe0 [ 1412.351400] ? unwind_get_return_address+0x61/0xa0 [ 1412.356313] ? __save_stack_trace+0x7e/0xd0 [ 1412.360615] ? depot_save_stack+0x12c/0x490 [ 1412.364924] do_signal+0x94/0x1ee0 [ 1412.368446] ? save_stack+0xa3/0xd0 [ 1412.372060] ? save_stack_trace+0x16/0x20 [ 1412.376789] ? save_stack+0x43/0xd0 [ 1412.380384] ? kasan_slab_free+0x71/0xc0 [ 1412.384413] ? kmem_cache_free+0x77/0x280 [ 1412.388540] ? putname+0xee/0x130 [ 1412.391961] ? do_sys_open+0x31b/0x6d0 [ 1412.395818] ? SyS_openat+0x30/0x40 [ 1412.399423] ? entry_SYSCALL_64_fastpath+0x1f/0xbe [ 1412.404346] ? setup_sigcontext+0x7d0/0x7d0 [ 1412.408648] ? __lock_is_held+0xb6/0x140 [ 1412.412695] ? __fd_install+0x2f7/0x6a0 [ 1412.416647] ? get_unused_fd_flags+0x190/0x190 [ 1412.421207] ? exit_to_usermode_loop+0x98/0x300 [ 1412.425854] exit_to_usermode_loop+0x224/0x300 [ 1412.430411] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 1412.435927] ? kmem_cache_free+0x249/0x280 [ 1412.440139] ? putname+0xf3/0x130 [ 1412.443572] syscall_return_slowpath+0x3a7/0x450 [ 1412.448314] ? prepare_exit_to_usermode+0x220/0x220 [ 1412.453311] ? entry_SYSCALL_64_fastpath+0x91/0xbe [ 1412.458216] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 1412.463205] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 1412.467937] entry_SYSCALL_64_fastpath+0xbc/0xbe [ 1412.472662] RIP: 0033:0x451e59 [ 1412.475822] RSP: 002b:00007f1b91501c08 EFLAGS: 00000216 ORIG_RAX: 0000000000000101 [ 1412.483506] RAX: 0000000000000006 RBX: 0000000000718000 RCX: 0000000000451e59 [ 1412.490762] RDX: 0000000000101000 RSI: 0000000020bd8000 RDI: ffffffffffffff9c [ 1412.498014] RBP: 0000000000004080 R08: 0000000000000000 R09: 0000000000000000 [ 1412.505270] R10: 0000000000000000 R11: 0000000000000216 R12: 00000000004ba4eb [ 1412.512517] R13: 00000000ffffffff R14: ffffffffffffff9c R15: 0000000020bd8000 [ 1412.519790] Code: d1 48 09 c1 0f ae e8 0f 31 48 c1 e2 20 48 09 d0 48 89 c2 48 29 ca 48 39 fa 73 25 65 ff 0d 61 79 2d 7b f3 90 65 ff 05 58 79 2d 7b <65> 8b 15 29 46 2d 7b 39 f2 74 ce 48 29 c1 89 d6 48 01 cf eb b5 [ 1412.538919] Kernel panic - not syncing: softlockup: hung tasks [ 1412.544866] CPU: 1 PID: 8514 Comm: syz-executor5 Tainted: G L 4.13.0-rc7+ #61 [ 1412.553246] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1412.562586] Call Trace: [ 1412.565144] [ 1412.567325] dump_stack+0x194/0x257 [ 1412.570932] ? arch_local_irq_restore+0x53/0x53 [ 1412.575572] ? vprintk_default+0x28/0x30 [ 1412.579622] ? vprintk_func+0x5e/0xc0 [ 1412.583413] panic+0x1e4/0x417 [ 1412.586589] ? __warn+0x1d9/0x1d9 [ 1412.590049] watchdog_timer_fn+0x401/0x410 [ 1412.594269] ? watchdog_park_threads+0x240/0x240 [ 1412.599010] __hrtimer_run_queues+0x349/0xe10 [ 1412.603493] ? watchdog_park_threads+0x240/0x240 [ 1412.608229] ? hrtimer_cancel+0x40/0x40 [ 1412.612187] ? pvclock_read_flags+0x160/0x160 [ 1412.616669] ? lock_acquire+0x1d5/0x580 [ 1412.620631] ? kvm_clock_get_cycles+0x25/0x30 [ 1412.625100] ? ktime_get_update_offsets_now+0x34a/0x520 [ 1412.630448] ? do_timer+0x50/0x50 [ 1412.633883] ? __softirqentry_text_start+0x8/0x8 [ 1412.638615] ? native_apic_msr_write+0x5c/0x80 [ 1412.643181] ? lapic_next_event+0x5a/0x90 [ 1412.647314] ? clockevents_program_event+0x108/0x2e0 [ 1412.652407] hrtimer_interrupt+0x1c2/0x5e0 [ 1412.656641] local_apic_timer_interrupt+0x6b/0xa0 [ 1412.661469] smp_apic_timer_interrupt+0x71/0xa0 [ 1412.666120] apic_timer_interrupt+0x93/0xa0 [ 1412.670412] RIP: 0010:delay_tsc+0x48/0x70 [ 1412.674534] RSP: 0018:ffff8801c638ef60 EFLAGS: 00000203 ORIG_RAX: ffffffffffffff10 [ 1412.682213] RAX: 000002f5e34fe488 RBX: ffffed0038c4c8f2 RCX: 000002f5e34fb7a7 [ 1412.689461] RDX: 0000000000002ce1 RSI: 0000000000000001 RDI: 00000000000059d9 [ 1412.696799] RBP: ffff8801c638ef60 R08: 0000000000000001 R09: 0000000000000000 [ 1412.704046] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801c638f208 [ 1412.711289] R13: ffff8801c6264780 R14: ffff8801d4415bb0 R15: ffff8801c6264800 [ 1412.718535] [ 1412.720766] __const_udelay+0x5b/0x70 [ 1412.724542] snd_timer_close+0x2ee/0xf20 [ 1412.728579] ? check_noncircular+0x20/0x20 [ 1412.732806] ? snd_timer_stop+0x80/0x80 [ 1412.736762] ? mntput_no_expire+0x130/0xa90 [ 1412.741059] ? lock_downgrade+0x990/0x990 [ 1412.745181] ? lock_release+0xa40/0xa40 [ 1412.749125] ? find_held_lock+0x35/0x1d0 [ 1412.753167] ? lock_downgrade+0x990/0x990 [ 1412.757289] ? locks_remove_file+0x414/0x560 [ 1412.761671] ? fcntl_setlk+0x10c0/0x10c0 [ 1412.765713] ? __fsnotify_parent+0xb4/0x3a0 [ 1412.770014] ? fsnotify+0x1af0/0x1af0 [ 1412.773797] ? _raw_spin_unlock+0x22/0x30 [ 1412.777927] ? snd_timer_close+0xf20/0xf20 [ 1412.782138] ? snd_timer_close+0xf20/0xf20 [ 1412.786344] snd_timer_user_release+0x97/0x130 [ 1412.790901] __fput+0x327/0x7e0 [ 1412.794160] ? fput+0x140/0x140 [ 1412.797412] ? check_same_owner+0x320/0x320 [ 1412.801712] ? do_raw_spin_trylock+0x190/0x190 [ 1412.806269] ? check_same_owner+0x320/0x320 [ 1412.810567] ____fput+0x15/0x20 [ 1412.813820] task_work_run+0x18a/0x260 [ 1412.817683] ? task_work_cancel+0x210/0x210 [ 1412.821978] ? _raw_spin_unlock+0x22/0x30 [ 1412.826099] ? switch_task_namespaces+0x87/0xc0 [ 1412.830743] do_exit+0xa3a/0x1b10 [ 1412.834168] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 1412.839325] ? __lock_acquire+0x6ef/0x3dc0 [ 1412.843529] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 1412.848691] ? trace_hardirqs_on+0xd/0x10 [ 1412.852833] ? mm_update_next_owner+0x930/0x930 [ 1412.857488] ? __lock_acquire+0x6ef/0x3dc0 [ 1412.861697] ? print_usage_bug+0x480/0x480 [ 1412.865912] ? __mutex_unlock_slowpath+0x2ef/0xac0 [ 1412.870820] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 1412.875980] ? get_mdev+0x67/0x80 [ 1412.879410] ? snd_seq_ioctl_unsubscribe_port+0x2c0/0x2c0 [ 1412.884931] ? wake_up_q+0x8a/0xe0 [ 1412.888457] ? check_noncircular+0x20/0x20 [ 1412.892677] ? check_noncircular+0x20/0x20 [ 1412.896885] ? __mutex_unlock_slowpath+0x2f8/0xac0 [ 1412.901783] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 1412.906862] ? wait_for_completion+0x730/0x730 [ 1412.911418] ? __lock_acquire+0x6ef/0x3dc0 [ 1412.915631] ? get_mdev+0x67/0x80 [ 1412.919075] ? find_held_lock+0x35/0x1d0 [ 1412.923124] ? get_signal+0x855/0x17e0 [ 1412.926983] ? lock_downgrade+0x990/0x990 [ 1412.931112] do_group_exit+0x149/0x400 [ 1412.934971] ? __lock_is_held+0xb6/0x140 [ 1412.939002] ? SyS_exit+0x30/0x30 [ 1412.942439] ? _raw_spin_unlock_irq+0x27/0x70 [ 1412.946925] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 1412.951919] get_signal+0x7e8/0x17e0 [ 1412.955641] ? ptrace_notify+0x130/0x130 [ 1412.959685] ? is_bpf_text_address+0xa4/0x120 [ 1412.964159] ? __kernel_text_address+0xae/0xe0 [ 1412.968716] ? unwind_get_return_address+0x61/0xa0 [ 1412.973619] ? __save_stack_trace+0x7e/0xd0 [ 1412.977916] ? depot_save_stack+0x12c/0x490 [ 1412.982223] do_signal+0x94/0x1ee0 [ 1412.985746] ? save_stack+0xa3/0xd0 [ 1412.989348] ? save_stack_trace+0x16/0x20 [ 1412.993473] ? save_stack+0x43/0xd0 [ 1412.997070] ? kasan_slab_free+0x71/0xc0 [ 1413.001101] ? kmem_cache_free+0x77/0x280 [ 1413.005219] ? putname+0xee/0x130 [ 1413.008649] ? do_sys_open+0x31b/0x6d0 [ 1413.012507] ? SyS_openat+0x30/0x40 [ 1413.016104] ? entry_SYSCALL_64_fastpath+0x1f/0xbe [ 1413.021012] ? setup_sigcontext+0x7d0/0x7d0 [ 1413.025317] ? __lock_is_held+0xb6/0x140 [ 1413.029363] ? __fd_install+0x2f7/0x6a0 [ 1413.033313] ? get_unused_fd_flags+0x190/0x190 [ 1413.037873] ? exit_to_usermode_loop+0x98/0x300 [ 1413.042520] exit_to_usermode_loop+0x224/0x300 [ 1413.047089] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 1413.052602] ? kmem_cache_free+0x249/0x280 [ 1413.056811] ? putname+0xf3/0x130 [ 1413.060239] syscall_return_slowpath+0x3a7/0x450 [ 1413.064977] ? prepare_exit_to_usermode+0x220/0x220 [ 1413.069971] ? entry_SYSCALL_64_fastpath+0x91/0xbe