INIT: Entering runlevel: 2 [[36minfo[39;49m] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.39' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 25.906452] IPVS: ftp: loaded support on port[0] = 21 [ 25.943299] FAULT_INJECTION: forcing a failure. [ 25.943299] name failslab, interval 1, probability 0, space 0, times 1 [ 25.954631] CPU: 0 PID: 4422 Comm: syzkaller101598 Not tainted 4.16.0-rc7+ #372 [ 25.962060] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.971395] Call Trace: [ 25.973965] dump_stack+0x194/0x24d [ 25.977587] ? arch_local_irq_restore+0x53/0x53 [ 25.982244] should_fail+0x8c0/0xa40 [ 25.985954] ? fault_create_debugfs_attr+0x1f0/0x1f0 [ 25.991038] ? rcu_read_lock_sched_held+0x108/0x120 [ 25.996045] ? find_held_lock+0x35/0x1d0 [ 26.000087] ? __lock_is_held+0xb6/0x140 [ 26.004154] ? check_same_owner+0x320/0x320 [ 26.008485] ? rcu_note_context_switch+0x710/0x710 [ 26.013417] should_failslab+0xec/0x120 [ 26.017372] kmem_cache_alloc_node_trace+0x5a/0x760 [ 26.022369] ? idr_alloc_u32+0x390/0x390 [ 26.026418] mem_cgroup_css_alloc+0x3b6/0x19c0 [ 26.030986] ? setup_cpu_cache+0x1c0/0x1c0 [ 26.035200] ? __kernfs_new_node+0x3f5/0x570 [ 26.039587] ? kernfs_dop_revalidate+0x380/0x380 [ 26.044320] ? memset+0x31/0x40 [ 26.047582] ? trace_hardirqs_off+0x10/0x10 [ 26.051887] ? kernfs_link_sibling+0x27d/0x380 [ 26.056450] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 26.061373] ? cgroup_kn_set_ugid+0x2c7/0x370 [ 26.065849] ? cgroup_file_name+0x1d0/0x1d0 [ 26.070144] ? mutex_unlock+0xd/0x10 [ 26.073835] ? __lock_is_held+0xb6/0x140 [ 26.077892] ? cgroup_addrm_files+0x67f/0xa70 [ 26.082372] ? trace_hardirqs_off+0x10/0x10 [ 26.086671] ? cgroup_file_write+0x710/0x710 [ 26.091064] ? cgroup_idr_replace+0x3f/0x50 [ 26.095363] ? trace_hardirqs_off+0x10/0x10 [ 26.099834] ? __lock_is_held+0xb6/0x140 [ 26.103888] ? __local_bh_enable_ip+0x121/0x230 [ 26.108537] ? __lock_is_held+0xb6/0x140 [ 26.112585] cgroup_apply_control_enable+0x44d/0xbc0 [ 26.117673] ? cgroup_propagate_control+0x570/0x570 [ 26.122676] ? css_populate_dir+0x289/0x420 [ 26.126979] cgroup_mkdir+0x56f/0xfc0 [ 26.130859] ? __lock_is_held+0xb6/0x140 [ 26.134903] ? cgroup_destroy_locked+0x750/0x750 [ 26.139637] ? rcu_read_lock_sched_held+0x108/0x120 [ 26.144635] ? kmem_cache_free+0x258/0x2a0 [ 26.148849] ? set_nlink+0xc1/0x160 [ 26.152457] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 26.157376] ? generic_permission+0x105/0x3c0 [ 26.161860] ? cgroup_destroy_locked+0x750/0x750 [ 26.166602] kernfs_iop_mkdir+0x153/0x1e0 [ 26.170734] vfs_mkdir+0x390/0x600 [ 26.174255] SyS_mkdirat+0x22b/0x2b0 [ 26.177946] ? SyS_mknod+0x480/0x480 [ 26.181640] ? trace_hardirqs_on+0xd/0x10 [ 26.185770] ? do_syscall_64+0xb7/0x940 [ 26.189722] ? SyS_mknod+0x480/0x480 [ 26.193416] do_syscall_64+0x281/0x940 [ 26.197281] ? vmalloc_sync_all+0x30/0x30 [ 26.201414] ? _raw_spin_unlock_irq+0x27/0x70 [ 26.205888] ? finish_task_switch+0x1c1/0x7e0 [ 26.210377] ? syscall_return_slowpath+0x550/0x550 [ 26.215283] ? syscall_return_slowpath+0x2ac/0x550 [ 26.220191] ? prepare_exit_to_usermode+0x350/0x350 [ 26.225187] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 26.230533] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.235790] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 26.240976] RIP: 0033:0x44a0c9 [ 26.244142] RSP: 002b:00007f1747954d78 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 [ 26.251826] RAX: ffffffffffffffda RBX: 00000000006dcc24 RCX: 000000000044a0c9 [ 26.259071] RDX: 0000000000000020 RSI: 0000000020000280 RDI: 0000000000000005 [ 26.266320] RBP: 00000000006dcc20 R08: 0000000000000002 R09: 0000000000003335 [ 26.273564] R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e [ 26.280810] R13: 00007f1747954d80 R14: ffffffffffffffff R15: 0000000000000006 [ 26.288471] kasan: CONFIG_KASAN_INLINE enabled [ 26.293144] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 26.300555] general protection fault: 0000 [#1] SMP KASAN [ 26.306069] Dumping ftrace buffer: [ 26.309583] (ftrace buffer empty) [ 26.313266] Modules linked in: [ 26.316438] CPU: 0 PID: 4422 Comm: syzkaller101598 Not tainted 4.16.0-rc7+ #372 [ 26.323875] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.333221] RIP: 0010:__mem_cgroup_free+0x71/0x110 [ 26.338126] RSP: 0018:ffff8801accf75a8 EFLAGS: 00010206 [ 26.343473] RAX: 0000000000000011 RBX: 0000000000000000 RCX: ffffffff8310cdfd [ 26.350721] RDX: 0000000000000000 RSI: 0000000000000040 RDI: 0000000000000088 [ 26.357963] RBP: ffff8801accf75c8 R08: 0000000000000000 R09: ffff8801accf73a0 [ 26.365216] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 26.372458] R13: ffff8801ad210d40 R14: dffffc0000000000 R15: ffff8801ad210d40 [ 26.379703] FS: 00007f1747955700(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 [ 26.387904] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 26.393756] CR2: 0000000000460000 CR3: 00000001cb367004 CR4: 00000000001606f0 [ 26.401003] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 26.408248] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 26.415505] Call Trace: [ 26.418079] mem_cgroup_css_alloc+0x403/0x19c0 [ 26.422636] ? setup_cpu_cache+0x1c0/0x1c0 [ 26.426849] ? __kernfs_new_node+0x3f5/0x570 [ 26.431233] ? kernfs_dop_revalidate+0x380/0x380 [ 26.435962] ? memset+0x31/0x40 [ 26.439229] ? trace_hardirqs_off+0x10/0x10 [ 26.443528] ? kernfs_link_sibling+0x27d/0x380 [ 26.448087] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 26.453004] ? cgroup_kn_set_ugid+0x2c7/0x370 [ 26.457472] ? cgroup_file_name+0x1d0/0x1d0 [ 26.461767] ? mutex_unlock+0xd/0x10 [ 26.465455] ? __lock_is_held+0xb6/0x140 [ 26.469495] ? cgroup_addrm_files+0x67f/0xa70 [ 26.473969] ? trace_hardirqs_off+0x10/0x10 [ 26.478275] ? cgroup_file_write+0x710/0x710 [ 26.482662] ? cgroup_idr_replace+0x3f/0x50 [ 26.486962] ? trace_hardirqs_off+0x10/0x10 [ 26.491272] ? __lock_is_held+0xb6/0x140 [ 26.495315] ? __local_bh_enable_ip+0x121/0x230 [ 26.499963] ? __lock_is_held+0xb6/0x140 [ 26.504016] cgroup_apply_control_enable+0x44d/0xbc0 [ 26.509111] ? cgroup_propagate_control+0x570/0x570 [ 26.514121] ? css_populate_dir+0x289/0x420 [ 26.518425] cgroup_mkdir+0x56f/0xfc0 [ 26.522207] ? __lock_is_held+0xb6/0x140 [ 26.526253] ? cgroup_destroy_locked+0x750/0x750 [ 26.530987] ? rcu_read_lock_sched_held+0x108/0x120 [ 26.535983] ? kmem_cache_free+0x258/0x2a0 [ 26.540213] ? set_nlink+0xc1/0x160 [ 26.543816] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 26.548733] ? generic_permission+0x105/0x3c0 [ 26.553206] ? cgroup_destroy_locked+0x750/0x750 [ 26.557944] kernfs_iop_mkdir+0x153/0x1e0 [ 26.562070] vfs_mkdir+0x390/0x600 [ 26.565587] SyS_mkdirat+0x22b/0x2b0 [ 26.569276] ? SyS_mknod+0x480/0x480 [ 26.572963] ? trace_hardirqs_on+0xd/0x10 [ 26.577087] ? do_syscall_64+0xb7/0x940 [ 26.581036] ? SyS_mknod+0x480/0x480 [ 26.584724] do_syscall_64+0x281/0x940 [ 26.588590] ? vmalloc_sync_all+0x30/0x30 [ 26.592711] ? _raw_spin_unlock_irq+0x27/0x70 [ 26.597181] ? finish_task_switch+0x1c1/0x7e0 [ 26.601651] ? syscall_return_slowpath+0x550/0x550 [ 26.606555] ? syscall_return_slowpath+0x2ac/0x550 [ 26.611461] ? prepare_exit_to_usermode+0x350/0x350 [ 26.616466] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 26.621806] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.626627] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 26.631792] RIP: 0033:0x44a0c9 [ 26.634956] RSP: 002b:00007f1747954d78 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 [ 26.642646] RAX: ffffffffffffffda RBX: 00000000006dcc24 RCX: 000000000044a0c9 [ 26.649891] RDX: 0000000000000020 RSI: 0000000020000280 RDI: 0000000000000005 [ 26.657137] RBP: 00000000006dcc20 R08: 0000000000000002 R09: 0000000000003335 [ 26.664382] R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e [ 26.671627] R13: 00007f1747954d80 R14: ffffffffffffffff R15: 0000000000000006 [ 26.678879] Code: 00 00 48 89 f8 48 c1 e8 03 42 80 3c 30 00 0f 85 99 00 00 00 4f 8b a4 e5 f0 09 00 00 49 8d bc 24 88 00 00 00 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 88 00 00 00 49 8b bc 24 88 00 00 00 e8 77 [ 26.698079] RIP: __mem_cgroup_free+0x71/0x110 RSP: ffff8801accf75a8 [ 26.704586] ---[ end trace 57ac07c30502ef78 ]--- [ 26.709349] Kernel panic - not syncing: Fatal exception [ 26.715102] Dumping ftrace buffer: [ 26.718614] (ftrace buffer empty) [ 26.722297] Kernel Offset: disabled [ 26.725905] Rebooting in 86400 seconds..