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-3,10.128.15.221' (ECDSA) to the list of known hosts. executing program umount(./0/file0) failed (errno 22) executing program umount(./0/file0) failed (errno 22) executing program umount(./0/file0) failed (errno 22) executing program umount(./0/file0) failed (errno 22) executing program umount(./0/file0) failed (errno 22) executing program umount(./0/file0) failed (errno 22) executing program umount(./0/file0) failed (errno 22) executing program umount(./0/file0) failed (errno 22) syzkaller login: [ 35.573932] WARNING: CPU: 1 PID: 21 at net/xfrm/xfrm_state.c:2322 xfrm_state_fini+0x46a/0x620 [ 35.575210] Kernel panic - not syncing: panic_on_warn set ... [ 35.575210] [ 35.576183] CPU: 1 PID: 21 Comm: kworker/u4:1 Not tainted 4.15.0-rc2+ #206 [ 35.577102] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.578344] Workqueue: netns cleanup_net [ 35.578888] Call Trace: [ 35.579259] dump_stack+0x194/0x257 [ 35.579787] ? arch_local_irq_restore+0x53/0x53 [ 35.580424] ? vsnprintf+0x1ed/0x1900 [ 35.580940] panic+0x1e4/0x41c [ 35.581383] ? refcount_error_report+0x214/0x214 [ 35.582016] ? show_regs_print_info+0x65/0x65 [ 35.582636] ? __warn+0x1c1/0x200 [ 35.583112] ? xfrm_state_fini+0x46a/0x620 [ 35.583678] __warn+0x1dc/0x200 [ 35.584124] ? xfrm_state_fini+0x46a/0x620 [ 35.584694] report_bug+0x211/0x2d0 [ 35.585190] fixup_bug.part.11+0x37/0x80 [ 35.585736] do_error_trap+0x2d7/0x3e0 [ 35.586281] ? math_error+0x400/0x400 [ 35.586794] ? __local_bh_enable_ip+0x121/0x230 [ 35.587445] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 35.588113] ? xfrm_state_flush+0x557/0x630 [ 35.588708] ? trace_hardirqs_on+0xd/0x10 [ 35.589279] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.589930] do_invalid_op+0x1b/0x20 [ 35.590432] invalid_op+0x18/0x20 [ 35.590898] RIP: 0010:xfrm_state_fini+0x46a/0x620 [ 35.591539] RSP: 0018:ffff8801d9ce70f0 EFLAGS: 00010293 [ 35.592311] RAX: ffff8801d9cda580 RBX: ffff8801cb0f8040 RCX: ffffffff8463700a [ 35.593276] RDX: 0000000000000000 RSI: 1ffff1003b39b5d1 RDI: ffffed003b39ce10 [ 35.595315] RBP: ffff8801d9ce7248 R08: 1ffff1003b39cda4 R09: 0000000000000000 [ 35.602554] R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff1003b39ce20 [ 35.609793] R13: ffff8801d9ce7220 R14: 1ffff1003b39ce24 R15: ffff8801cb0f9500 [ 35.617050] ? xfrm_state_fini+0x46a/0x620 [ 35.621260] ? xfrm_state_init+0x4a0/0x4a0 [ 35.625470] ? mark_held_locks+0xb2/0x100 [ 35.629585] ? kfree+0xe4/0x250 [ 35.632832] ? xfrm_sysctl_fini+0x63/0x80 [ 35.636980] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 35.641965] ? trace_hardirqs_on+0xd/0x10 [ 35.646086] ? xfrm_policy_fini+0x550/0x550 [ 35.650377] xfrm_net_exit+0x25/0x30 [ 35.654064] ops_exit_list.isra.6+0xae/0x150 [ 35.658443] cleanup_net+0x5c7/0xb60 [ 35.662129] ? unregister_pernet_device+0x80/0x80 [ 35.666947] ? find_held_lock+0x39/0x1d0 [ 35.670984] ? check_noncircular+0x20/0x20 [ 35.675197] ? process_one_work+0xb2f/0x1be0 [ 35.679585] ? __lock_is_held+0xbc/0x140 [ 35.683629] process_one_work+0xbfd/0x1be0 [ 35.687845] ? pwq_dec_nr_in_flight+0x450/0x450 [ 35.692493] ? finish_task_switch+0x1d3/0x740 [ 35.696958] ? finish_task_switch+0x1aa/0x740 [ 35.701453] ? __sched_text_start+0x8/0x8 [ 35.705572] ? lock_downgrade+0x980/0x980 [ 35.709691] ? __wake_up_common_lock+0x190/0x310 [ 35.714428] ? find_held_lock+0x39/0x1d0 [ 35.718645] ? lock_acquire+0x1d5/0x580 [ 35.722587] ? worker_thread+0x4a3/0x1990 [ 35.726720] ? lock_release+0xda0/0xda0 [ 35.730664] ? worker_pool_assign_id+0x1b0/0x1b0 [ 35.735391] ? do_raw_spin_trylock+0x190/0x190 [ 35.739960] worker_thread+0x223/0x1990 [ 35.743923] ? process_one_work+0x1be0/0x1be0 [ 35.748397] ? _raw_spin_unlock_irq+0x27/0x70 [ 35.753016] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 35.758130] ? trace_hardirqs_on+0xd/0x10 [ 35.762261] ? _raw_spin_unlock_irq+0x27/0x70 [ 35.766726] ? finish_task_switch+0x1d3/0x740 [ 35.771190] ? finish_task_switch+0x1aa/0x740 [ 35.775656] ? copy_overflow+0x20/0x20 [ 35.779524] ? __schedule+0x8f3/0x2060 [ 35.783380] ? check_noncircular+0x20/0x20 [ 35.787595] ? find_held_lock+0x39/0x1d0 [ 35.791643] ? find_held_lock+0x39/0x1d0 [ 35.795690] ? lock_downgrade+0x980/0x980 [ 35.799818] ? default_wake_function+0x30/0x50 [ 35.804382] ? __schedule+0x2060/0x2060 [ 35.808328] ? do_wait_intr+0x3e0/0x3e0 [ 35.812283] ? do_raw_spin_trylock+0x190/0x190 [ 35.816840] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 35.821914] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 35.826899] ? trace_hardirqs_on+0xd/0x10 [ 35.831015] ? __kthread_parkme+0x175/0x240 [ 35.835308] kthread+0x37a/0x440 [ 35.838641] ? process_one_work+0x1be0/0x1be0 [ 35.843100] ? kthread_stop+0x7b0/0x7b0 [ 35.847051] ret_from_fork+0x24/0x30 [ 35.851005] Dumping ftrace buffer: [ 35.854590] (ftrace buffer empty) [ 35.858267] Kernel Offset: disabled [ 35.861865] Rebooting in 86400 seconds..