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-next-kasan-gce-6,10.128.0.59' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 119.746181] kasan: CONFIG_KASAN_INLINE enabled [ 119.746897] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 119.748029] general protection fault: 0000 [#1] SMP KASAN [ 119.748780] Dumping ftrace buffer: [ 119.749256] (ftrace buffer empty) [ 119.749749] Modules linked in: [ 119.750180] CPU: 0 PID: 2982 Comm: syzkaller228943 Not tainted 4.14.0-rc4-next-20171009+ #33 [ 119.751313] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 119.752531] task: ffff8801d07ee180 task.stack: ffff8801ceb28000 [ 119.753333] RIP: 0010:hrtimer_active+0x211/0x410 [ 119.753966] RSP: 0018:ffff8801ceb2f3f0 EFLAGS: 00010246 [ 119.754674] RAX: 0000000000000000 RBX: 1ffff10039d65eab RCX: 1ffff10039d65ee4 [ 119.755625] RDX: ffff8801d07ee180 RSI: ffffffff8593c500 RDI: ffff8801ce291160 [ 119.756574] RBP: ffff8801ceb2f530 R08: ffffffff83ef07c7 R09: ffff8801ceb2ee00 [ 119.757552] R10: ffff8801ceb2f898 R11: 1ffff1003a0fdec3 R12: 0000000000000000 [ 119.758502] R13: 0000000000000000 R14: ffffed0039d65e89 R15: dffffc0000000000 [ 119.759454] FS: 0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 119.760526] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 119.761301] CR2: 0000000020511fd8 CR3: 00000001cea56000 CR4: 00000000001406f0 [ 119.762253] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 119.763206] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 119.764158] Call Trace: [ 119.764517] ? hrtimer_forward+0x2d0/0x2d0 [ 119.765082] ? __might_sleep+0x95/0x190 [ 119.765614] ? rtnl_lock+0x17/0x20 [ 119.766135] ? __mutex_lock+0x16f/0x19d0 [ 119.769043] ? rtnl_lock+0x17/0x20 [ 119.772547] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 119.777701] ? fsnotify+0xb6f/0x1af0 [ 119.781383] ? rtnl_lock+0x17/0x20 [ 119.784893] hrtimer_try_to_cancel+0x91/0x5c0 [ 119.789353] ? __hrtimer_get_remaining+0x1c0/0x1c0 [ 119.794254] ? check_same_owner+0x320/0x320 [ 119.798540] ? __free_insn_slot+0x5c0/0x5c0 [ 119.802827] ? __lock_is_held+0xbc/0x140 [ 119.806855] hrtimer_cancel+0x22/0x40 [ 119.810622] napi_disable+0x87/0xa0 [ 119.814212] __tun_detach+0xe26/0x1570 [ 119.818065] ? check_noncircular+0x20/0x20 [ 119.822268] ? unwind_get_return_address+0x61/0xa0 [ 119.827161] ? check_noncircular+0x20/0x20 [ 119.831358] ? tun_attach+0x1070/0x1070 [ 119.835296] ? depot_save_stack+0x12c/0x490 [ 119.839585] ? locks_remove_file+0x3fa/0x5a0 [ 119.843961] ? fcntl_setlk+0x10d0/0x10d0 [ 119.847991] ? __fsnotify_parent+0xb4/0x3a0 [ 119.852276] ? fsnotify+0x1af0/0x1af0 [ 119.856042] ? __tun_detach+0x1570/0x1570 [ 119.860154] ? __tun_detach+0x1570/0x1570 [ 119.864264] tun_chr_close+0x44/0x60 [ 119.867945] __fput+0x333/0x7f0 [ 119.871190] ? fput+0x140/0x140 [ 119.874433] ? _raw_spin_unlock_irq+0x27/0x70 [ 119.878896] ____fput+0x15/0x20 [ 119.882140] task_work_run+0x199/0x270 [ 119.885994] ? task_work_cancel+0x210/0x210 [ 119.890280] ? _raw_spin_unlock+0x22/0x30 [ 119.894391] ? switch_task_namespaces+0x87/0xc0 [ 119.899028] do_exit+0x9c8/0x1b00 [ 119.902446] ? mm_update_next_owner+0x930/0x930 [ 119.907081] ? rtnl_unlock+0xe/0x10 [ 119.910671] ? __tun_chr_ioctl+0x27a/0x3e40 [ 119.914956] ? unwind_get_return_address+0x14/0xa0 [ 119.919852] ? tun_chr_read_iter+0x1e0/0x1e0 [ 119.924832] ? putname+0xee/0x130 [ 119.928247] ? save_stack+0xa3/0xd0 [ 119.931844] ? save_stack+0x43/0xd0 [ 119.935431] ? kasan_slab_free+0x71/0xc0 [ 119.939455] ? kmem_cache_free+0x77/0x280 [ 119.943564] ? putname+0xee/0x130 [ 119.946982] ? do_sys_open+0x31b/0x6d0 [ 119.950836] ? __lock_is_held+0xbc/0x140 [ 119.954869] ? check_same_owner+0x320/0x320 [ 119.959156] ? tun_chr_compat_ioctl+0x30/0x30 [ 119.963620] ? tun_chr_ioctl+0x2a/0x40 [ 119.967469] ? tun_chr_ioctl+0x2a/0x40 [ 119.971321] ? do_vfs_ioctl+0x492/0x1530 [ 119.975348] ? ioctl_preallocate+0x2b0/0x2b0 [ 119.979722] ? selinux_capable+0x40/0x40 [ 119.983749] ? putname+0xf3/0x130 [ 119.987167] do_group_exit+0x149/0x400 [ 119.991017] ? SyS_exit+0x30/0x30 [ 119.994433] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 119.999415] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 120.004137] SyS_exit_group+0x1d/0x20 [ 120.007907] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 120.012628] RIP: 0033:0x442aa8 [ 120.015783] RSP: 002b:00007ffe097ecf58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 120.023455] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000442aa8 [ 120.030689] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 120.037920] RBP: 0000000000000082 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 120.045153] R10: 0000000000000000 R11: 0000000000000246 R12: 74656e2f7665642f [ 120.052385] R13: 0000000000401b80 R14: 0000000000000000 R15: 0000000000000000 [ 120.059628] Code: c6 00 00 48 8b 85 d8 fe ff ff 48 c1 e8 03 42 80 3c 38 00 0f 85 f2 01 00 00 48 8b 85 e8 fe ff ff 4c 8b 60 30 4c 89 e0 48 c1 e8 03 <42> 80 3c 38 00 0f 85 c8 01 00 00 48 8b 85 f0 fe ff ff 49 8b 1c [ 120.078694] RIP: hrtimer_active+0x211/0x410 RSP: ffff8801ceb2f3f0 [ 120.084950] ---[ end trace 2a3facd2b3aa1fd8 ]--- [ 120.089862] Kernel panic - not syncing: Fatal exception [ 120.095513] Dumping ftrace buffer: [ 120.099013] (ftrace buffer empty) [ 120.102690] Kernel Offset: disabled [ 120.106282] Rebooting in 86400 seconds..