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-386-2,10.128.0.43' (ECDSA) to the list of known hosts. executing program unlink(./0/file0/fb) failed (errno 1) executing program unlink(./0/file0/fb) failed (errno 1) executing program unlink(./0/file0/fb) failed (errno 1) executing program unlink(./0/file0/fb) failed (errno 1) executing program unlink(./0/file0/fb) failed (errno 1) executing program unlink(./0/file0/fb) failed (errno 1) executing program unlink(./0/file0/fb) failed (errno 1) executing program unlink(./0/file0/fb) failed (errno 1) syzkaller login: [ 28.061591] WARNING: CPU: 0 PID: 21 at net/xfrm/xfrm_state.c:2323 xfrm_state_fini+0x46a/0x620 [ 28.070319] Kernel panic - not syncing: panic_on_warn set ... [ 28.070319] [ 28.077653] CPU: 0 PID: 21 Comm: kworker/u4:1 Not tainted 4.14.0+ #97 [ 28.084198] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.093528] Workqueue: netns cleanup_net [ 28.097556] Call Trace: [ 28.100117] dump_stack+0x194/0x257 [ 28.103718] ? arch_local_irq_restore+0x53/0x53 [ 28.108368] ? vsnprintf+0x1ed/0x1900 [ 28.112143] panic+0x1e4/0x41c [ 28.115307] ? refcount_error_report+0x214/0x214 [ 28.120032] ? show_regs_print_info+0x65/0x65 [ 28.124511] ? __warn+0x1c1/0x200 [ 28.127945] ? xfrm_state_fini+0x46a/0x620 [ 28.132148] __warn+0x1dc/0x200 [ 28.135404] ? xfrm_state_fini+0x46a/0x620 [ 28.139610] report_bug+0x211/0x2d0 [ 28.143213] fixup_bug.part.11+0x37/0x80 [ 28.147252] do_error_trap+0x2d7/0x3e0 [ 28.151113] ? math_error+0x400/0x400 [ 28.154884] ? __local_bh_enable_ip+0x121/0x230 [ 28.159524] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 28.164508] ? xfrm_state_flush+0x557/0x630 [ 28.168796] ? trace_hardirqs_on+0xd/0x10 [ 28.172917] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.177749] do_invalid_op+0x1b/0x20 [ 28.181431] invalid_op+0x18/0x20 [ 28.184851] RIP: 0010:xfrm_state_fini+0x46a/0x620 [ 28.189668] RSP: 0018:ffff8801d9ce70f0 EFLAGS: 00010293 [ 28.195000] RAX: ffff8801d9cde580 RBX: ffff8801cc9bc040 RCX: ffffffff845cb0fa [ 28.202236] RDX: 0000000000000000 RSI: 1ffff1003b39bdd1 RDI: ffffed003b39ce10 [ 28.209487] RBP: ffff8801d9ce7248 R08: 1ffff1003b39cda4 R09: 0000000000000000 [ 28.216731] R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff1003b39ce20 [ 28.224322] R13: ffff8801d9ce7220 R14: 1ffff1003b39ce24 R15: ffff8801cc9bd500 [ 28.231578] ? xfrm_state_fini+0x46a/0x620 [ 28.235803] ? xfrm_state_init+0x4a0/0x4a0 [ 28.240029] ? mark_held_locks+0xb2/0x100 [ 28.244149] ? kfree+0xe4/0x250 [ 28.247396] ? xfrm_sysctl_fini+0x63/0x80 [ 28.251514] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 28.256500] ? trace_hardirqs_on+0xd/0x10 [ 28.260619] ? xfrm_policy_fini+0x550/0x550 [ 28.264917] xfrm_net_exit+0x25/0x30 [ 28.268607] ops_exit_list.isra.6+0xae/0x150 [ 28.272996] cleanup_net+0x5c7/0xb60 [ 28.276684] ? unregister_pernet_device+0x80/0x80 [ 28.281501] ? find_held_lock+0x39/0x1d0 [ 28.285534] ? check_noncircular+0x20/0x20 [ 28.289745] ? process_one_work+0xb2f/0x1be0 [ 28.294142] ? __lock_is_held+0xbc/0x140 [ 28.298190] process_one_work+0xbfd/0x1be0 [ 28.302403] ? pwq_dec_nr_in_flight+0x450/0x450 [ 28.307042] ? finish_task_switch+0x1d3/0x740 [ 28.311502] ? finish_task_switch+0x1aa/0x740 [ 28.315991] ? __sched_text_start+0x8/0x8 [ 28.320113] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 28.325274] ? select_task_rq_fair+0x2770/0x2770 [ 28.330084] ? check_noncircular+0x20/0x20 [ 28.334299] ? find_held_lock+0x39/0x1d0 [ 28.338339] ? lock_acquire+0x1d5/0x580 [ 28.342279] ? worker_thread+0x4a3/0x1990 [ 28.346408] ? lock_release+0xda0/0xda0 [ 28.350353] ? worker_pool_assign_id+0x1b0/0x1b0 [ 28.355081] ? do_raw_spin_trylock+0x190/0x190 [ 28.359645] worker_thread+0x223/0x1990 [ 28.363607] ? process_one_work+0x1be0/0x1be0 [ 28.368074] ? _raw_spin_unlock_irq+0x27/0x70 [ 28.372539] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 28.377524] ? trace_hardirqs_on+0xd/0x10 [ 28.381655] ? _raw_spin_unlock_irq+0x27/0x70 [ 28.386118] ? finish_task_switch+0x1d3/0x740 [ 28.390579] ? finish_task_switch+0x1aa/0x740 [ 28.395053] ? copy_overflow+0x20/0x20 [ 28.398919] ? __schedule+0x8f3/0x2060 [ 28.402781] ? check_noncircular+0x20/0x20 [ 28.406995] ? find_held_lock+0x39/0x1d0 [ 28.411055] ? find_held_lock+0x39/0x1d0 [ 28.415095] ? lock_downgrade+0x980/0x980 [ 28.419218] ? default_wake_function+0x30/0x50 [ 28.423777] ? __schedule+0x2060/0x2060 [ 28.427720] ? do_wait_intr+0x3e0/0x3e0 [ 28.431666] ? do_raw_spin_trylock+0x190/0x190 [ 28.436219] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 28.441292] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 28.446276] ? trace_hardirqs_on+0xd/0x10 [ 28.450392] ? __kthread_parkme+0x175/0x240 [ 28.454684] kthread+0x37a/0x440 [ 28.458023] ? process_one_work+0x1be0/0x1be0 [ 28.462490] ? kthread_stop+0x7b0/0x7b0 [ 28.466433] ret_from_fork+0x24/0x30 [ 28.470389] Dumping ftrace buffer: [ 28.473979] (ftrace buffer empty) [ 28.477660] Kernel Offset: disabled [ 28.481258] Rebooting in 86400 seconds..