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-mmots-kasan-gce-0,10.128.0.29' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 76.393162] kasan: CONFIG_KASAN_INLINE enabled [ 76.397809] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 76.405260] general protection fault: 0000 [#1] SMP KASAN [ 76.410764] Dumping ftrace buffer: [ 76.414270] (ftrace buffer empty) [ 76.417945] Modules linked in: [ 76.421106] CPU: 0 PID: 2979 Comm: syzkaller105025 Not tainted 4.14.0-rc4-mm1+ #16 [ 76.428774] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.438094] task: ffff8801ceb0c240 task.stack: ffff8801ce130000 [ 76.444119] RIP: 0010:hrtimer_active+0x211/0x410 [ 76.448836] RSP: 0018:ffff8801ce1373f0 EFLAGS: 00010246 [ 76.454164] RAX: 0000000000000000 RBX: 1ffff10039c26eab RCX: 1ffff10039c26ee4 [ 76.461401] RDX: ffff8801ceb0c240 RSI: ffffffff8593bfc0 RDI: ffff8801ce6cd360 [ 76.468637] RBP: ffff8801ce137530 R08: ffffffff83eef7b7 R09: ffff8801ce136e00 [ 76.475870] R10: ffff8801ce137898 R11: 1ffff10039d61adb R12: 0000000000000000 [ 76.483104] R13: 0000000000000000 R14: ffffed0039c26e89 R15: dffffc0000000000 [ 76.490339] FS: 0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 76.498530] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 76.504379] CR2: 0000000020511fd8 CR3: 00000001ce404000 CR4: 00000000001406f0 [ 76.511614] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 76.518849] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 76.526084] Call Trace: [ 76.528646] ? hrtimer_forward+0x2d0/0x2d0 [ 76.532846] ? __might_sleep+0x95/0x190 [ 76.536787] ? rtnl_lock+0x17/0x20 [ 76.540292] ? __mutex_lock+0x16f/0x19d0 [ 76.544314] ? rtnl_lock+0x17/0x20 [ 76.547820] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 76.552973] ? fsnotify+0xb6f/0x1af0 [ 76.556650] ? rtnl_lock+0x17/0x20 [ 76.560161] hrtimer_try_to_cancel+0x91/0x5c0 [ 76.564624] ? __hrtimer_get_remaining+0x1c0/0x1c0 [ 76.569524] ? check_same_owner+0x320/0x320 [ 76.573812] ? __free_insn_slot+0x5c0/0x5c0 [ 76.578098] ? __lock_is_held+0xbc/0x140 [ 76.582124] hrtimer_cancel+0x22/0x40 [ 76.585891] napi_disable+0x87/0xa0 [ 76.589489] __tun_detach+0xe26/0x1570 [ 76.593344] ? check_noncircular+0x20/0x20 [ 76.597544] ? unwind_get_return_address+0x61/0xa0 [ 76.602436] ? check_noncircular+0x20/0x20 [ 76.606635] ? tun_attach+0x1070/0x1070 [ 76.610573] ? depot_save_stack+0x12c/0x490 [ 76.614862] ? locks_remove_file+0x3fa/0x5a0 [ 76.619234] ? fcntl_setlk+0x10d0/0x10d0 [ 76.623261] ? __fsnotify_parent+0xb4/0x3a0 [ 76.627547] ? fsnotify+0x1af0/0x1af0 [ 76.631312] ? __tun_detach+0x1570/0x1570 [ 76.635423] ? __tun_detach+0x1570/0x1570 [ 76.639534] tun_chr_close+0x44/0x60 [ 76.643213] __fput+0x333/0x7f0 [ 76.646461] ? fput+0x140/0x140 [ 76.649705] ? _raw_spin_unlock_irq+0x27/0x70 [ 76.654166] ____fput+0x15/0x20 [ 76.657409] task_work_run+0x199/0x270 [ 76.661260] ? task_work_cancel+0x210/0x210 [ 76.665554] ? _raw_spin_unlock+0x22/0x30 [ 76.669669] ? switch_task_namespaces+0x87/0xc0 [ 76.674303] do_exit+0x9c8/0x1b00 [ 76.677722] ? mm_update_next_owner+0x930/0x930 [ 76.682354] ? rtnl_unlock+0xe/0x10 [ 76.685945] ? __tun_chr_ioctl+0x27a/0x3e40 [ 76.690229] ? unwind_get_return_address+0x14/0xa0 [ 76.695125] ? tun_chr_read_iter+0x1e0/0x1e0 [ 76.699498] ? putname+0xee/0x130 [ 76.702914] ? save_stack+0xa3/0xd0 [ 76.706503] ? save_stack+0x43/0xd0 [ 76.710093] ? kasan_slab_free+0x71/0xc0 [ 76.714114] ? kmem_cache_free+0x77/0x280 [ 76.718223] ? putname+0xee/0x130 [ 76.721638] ? do_sys_open+0x31b/0x6d0 [ 76.725501] ? __lock_is_held+0xbc/0x140 [ 76.729534] ? check_same_owner+0x320/0x320 [ 76.733821] ? tun_chr_compat_ioctl+0x30/0x30 [ 76.738279] ? tun_chr_ioctl+0x2a/0x40 [ 76.742128] ? tun_chr_ioctl+0x2a/0x40 [ 76.745979] ? do_vfs_ioctl+0x492/0x1530 [ 76.750005] ? ioctl_preallocate+0x2b0/0x2b0 [ 76.754379] ? selinux_capable+0x40/0x40 [ 76.758404] ? putname+0xf3/0x130 [ 76.761823] do_group_exit+0x149/0x400 [ 76.765673] ? SyS_exit+0x30/0x30 [ 76.769089] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 76.774083] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 76.778805] SyS_exit_group+0x1d/0x20 [ 76.782570] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 76.787288] RIP: 0033:0x442aa8 [ 76.790445] RSP: 002b:00007ffc135a0078 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 76.798113] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000442aa8 [ 76.805347] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 76.812581] RBP: 0000000000000082 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 76.819813] R10: 0000000000000000 R11: 0000000000000246 R12: 74656e2f7665642f [ 76.827045] R13: 0000000000401b80 R14: 0000000000000000 R15: 0000000000000000 [ 76.834285] 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 [ 76.853352] RIP: hrtimer_active+0x211/0x410 RSP: ffff8801ce1373f0 [ 76.859603] ---[ end trace 17249398b32302d3 ]--- [ 76.864335] Kernel panic - not syncing: Fatal exception [ 76.870020] Dumping ftrace buffer: [ 76.873536] (ftrace buffer empty) [ 76.877215] Kernel Offset: disabled [ 76.880809] Rebooting in 86400 seconds..