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 '10.128.10.11' (ECDSA) to the list of known hosts. 2018/03/31 12:59:47 parsed 1 programs 2018/03/31 12:59:47 executed programs: 0 syzkaller login: [ 91.494796] IPVS: ftp: loaded support on port[0] = 21 [ 91.520811] IPVS: ftp: loaded support on port[0] = 21 [ 91.542052] IPVS: ftp: loaded support on port[0] = 21 [ 91.566155] IPVS: ftp: loaded support on port[0] = 21 [ 91.577664] FAULT_INJECTION: forcing a failure. [ 91.577664] name failslab, interval 1, probability 0, space 0, times 1 [ 91.588906] CPU: 1 PID: 4482 Comm: syz-executor7 Not tainted 4.16.0-rc7+ #373 [ 91.594185] FAULT_INJECTION: forcing a failure. [ 91.594185] name failslab, interval 1, probability 0, space 0, times 1 [ 91.596150] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 91.596153] Call Trace: [ 91.596165] dump_stack+0x194/0x24d [ 91.596176] ? arch_local_irq_restore+0x53/0x53 [ 91.596183] ? find_held_lock+0x35/0x1d0 [ 91.596192] should_fail+0x8c0/0xa40 [ 91.596198] ? __list_lru_init+0x352/0x750 [ 91.596207] ? fault_create_debugfs_attr+0x1f0/0x1f0 [ 91.644467] ? find_next_zero_bit+0xe3/0x110 [ 91.648849] ? trace_hardirqs_off+0x10/0x10 [ 91.653141] ? find_held_lock+0x35/0x1d0 [ 91.657177] ? __lock_is_held+0xb6/0x140 [ 91.661214] ? check_same_owner+0x320/0x320 [ 91.665504] ? lock_downgrade+0x980/0x980 [ 91.669621] ? rcu_note_context_switch+0x710/0x710 [ 91.674520] ? find_held_lock+0x35/0x1d0 [ 91.678553] should_failslab+0xec/0x120 [ 91.682497] __kmalloc+0x63/0x760 [ 91.685919] ? lock_downgrade+0x980/0x980 [ 91.690037] ? register_shrinker+0x10e/0x2d0 [ 91.694413] ? trace_event_raw_event_module_request+0x320/0x320 [ 91.700440] register_shrinker+0x10e/0x2d0 [ 91.704643] ? prepare_kswapd_sleep+0x1f0/0x1f0 [ 91.709282] ? memcpy+0x45/0x50 [ 91.712533] sget_userns+0xbbf/0xe40 [ 91.716218] ? set_anon_super+0x20/0x20 [ 91.720167] ? put_filp+0x90/0x90 [ 91.723590] ? destroy_unused_super.part.6+0xd0/0xd0 [ 91.728666] ? __alloc_pages_slowpath+0x2d10/0x2d10 [ 91.733656] ? save_stack+0xa3/0xd0 [ 91.737252] ? save_stack+0x43/0xd0 [ 91.740856] ? kasan_slab_alloc+0x12/0x20 [ 91.744973] ? kmem_cache_alloc+0x12e/0x760 [ 91.749266] ? alloc_pid+0xc1/0xa00 [ 91.752866] ? __radix_tree_replace+0x1af/0x310 [ 91.757501] ? radix_tree_delete+0x30/0x30 [ 91.761703] ? node_tag_clear+0xf2/0x180 [ 91.765736] ? proc_get_inode+0x620/0x620 [ 91.769853] mount_ns+0x6d/0x190 [ 91.773192] proc_mount+0x7a/0x90 [ 91.776613] mount_fs+0x66/0x2d0 [ 91.779954] vfs_kern_mount.part.26+0xc6/0x4a0 [ 91.784505] ? may_umount+0xa0/0xa0 [ 91.788103] ? idr_alloc_cyclic+0x1d6/0x320 [ 91.792393] ? do_raw_spin_trylock+0x190/0x190 [ 91.796965] ? idr_alloc+0x180/0x180 [ 91.800661] kern_mount_data+0x50/0xb0 [ 91.804516] pid_ns_prepare_proc+0x1e/0x80 [ 91.808722] alloc_pid+0x87e/0xa00 [ 91.812235] ? __change_pid+0x400/0x400 [ 91.816180] ? ns_capable_common+0xcf/0x160 [ 91.820472] ? memset+0x31/0x40 [ 91.823721] ? copy_thread_tls+0x268/0x8f0 [ 91.827930] copy_process.part.38+0x2516/0x4bd0 [ 91.832574] ? __cleanup_sighand+0x40/0x40 [ 91.836782] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 91.841949] ? __lock_acquire+0x664/0x3e00 [ 91.846153] ? unwind_dump+0x4d0/0x4d0 [ 91.850013] ? rcutorture_record_progress+0x10/0x10 [ 91.855002] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 91.860161] ? kernel_text_address+0xd1/0xe0 [ 91.864539] ? __unwind_start+0x169/0x330 [ 91.868661] ? __kernel_text_address+0xd/0x40 [ 91.873125] ? unwind_get_return_address+0x61/0xa0 [ 91.878026] ? __save_stack_trace+0x7e/0xd0 [ 91.882315] ? add_lock_to_list.isra.29+0x24d/0x352 [ 91.887299] ? print_lockdep_cache.isra.32+0x109/0x109 [ 91.892544] ? trace_hardirqs_off+0x10/0x10 [ 91.896833] ? save_stack_trace+0x1a/0x20 [ 91.900954] ? __lock_acquire+0x36c0/0x3e00 [ 91.905245] ? check_same_owner+0x320/0x320 [ 91.909535] ? find_held_lock+0x35/0x1d0 [ 91.913569] ? _parse_integer+0xe9/0x140 [ 91.917600] ? trace_hardirqs_off+0x10/0x10 [ 91.921892] ? _parse_integer+0x140/0x140 [ 91.926029] ? trace_hardirqs_off+0x10/0x10 [ 91.930318] ? get_pid_task+0x93/0x140 [ 91.934174] ? lock_downgrade+0x980/0x980 [ 91.938297] ? find_held_lock+0x35/0x1d0 [ 91.942330] ? __f_unlock_pos+0x19/0x20 [ 91.946274] ? lock_downgrade+0x980/0x980 [ 91.950390] ? get_pid_task+0xbc/0x140 [ 91.954245] ? proc_fail_nth_write+0x9b/0x1d0 [ 91.958710] ? map_files_get_link+0x3a0/0x3a0 [ 91.963179] _do_fork+0x1f7/0xf70 [ 91.966602] ? fork_idle+0x2d0/0x2d0 [ 91.970286] ? wait_for_completion+0x770/0x770 [ 91.974839] ? __lock_is_held+0xb6/0x140 [ 91.978875] ? __sb_end_write+0xa0/0xd0 [ 91.982820] ? fput+0xd2/0x140 [ 91.985982] ? SyS_write+0x184/0x220 [ 91.989664] ? SyS_read+0x220/0x220 [ 91.993262] SyS_clone+0x37/0x50 [ 91.996597] ? sys_vfork+0x30/0x30 [ 92.000108] do_syscall_64+0x281/0x940 [ 92.003965] ? vmalloc_sync_all+0x30/0x30 [ 92.008084] ? _raw_spin_unlock_irq+0x27/0x70 [ 92.012546] ? finish_task_switch+0x1c1/0x7e0 [ 92.017009] ? syscall_return_slowpath+0x550/0x550 [ 92.021908] ? syscall_return_slowpath+0x2ac/0x550 [ 92.026807] ? prepare_exit_to_usermode+0x350/0x350 [ 92.031792] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 92.037125] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 92.041939] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 92.047097] RIP: 0033:0x454e79 [ 92.050254] RSP: 002b:00007fd1669b7c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 [ 92.057930] RAX: ffffffffffffffda RBX: 00007fd1669b86d4 RCX: 0000000000454e79 [ 92.065167] RDX: 00000000200008c0 RSI: 0000000020000800 RDI: 000000002000c100 [ 92.072406] RBP: 000000000072bea0 R08: 0000000020000940 R09: 0000000000000000 [ 92.079648] R10: 0000000020000900 R11: 0000000000000246 R12: 0000000000000004 [ 92.086887] R13: 0000000000000051 R14: 00000000006f2838 R15: 0000000000000028 [ 92.094139] CPU: 0 PID: 4486 Comm: syz-executor1 Not tainted 4.16.0-rc7+ #373 [ 92.101405] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 92.101772] FAULT_INJECTION: forcing a failure. [ 92.101772] name failslab, interval 1, probability 0, space 0, times 0 [ 92.110727] Call Trace: [ 92.110737] dump_stack+0x194/0x24d [ 92.110744] ? arch_local_irq_restore+0x53/0x53 [ 92.110754] should_fail+0x8c0/0xa40 [ 92.110763] ? fault_create_debugfs_attr+0x1f0/0x1f0 [ 92.141428] ? trace_hardirqs_off+0x10/0x10 [ 92.145720] ? __lockdep_init_map+0xe4/0x650 [ 92.150097] ? __lockdep_init_map+0xe4/0x650 [ 92.154474] ? d_set_d_op+0x30b/0x400 [ 92.158246] ? find_held_lock+0x35/0x1d0 [ 92.162276] ? __lock_is_held+0xb6/0x140 [ 92.166312] ? check_same_owner+0x320/0x320 [ 92.170604] ? rcu_note_context_switch+0x710/0x710 [ 92.175504] ? lock_acquire+0x1d5/0x580 [ 92.179450] should_failslab+0xec/0x120 [ 92.183394] kmem_cache_alloc+0x47/0x760 [ 92.187427] ? __d_alloc+0xbd0/0xbd0 [ 92.191119] ? proc_i_callback+0x30/0x30 [ 92.195158] ? proc_get_inode+0x620/0x620 [ 92.199274] proc_alloc_inode+0x1b/0x190 [ 92.203306] alloc_inode+0x65/0x180 [ 92.206902] new_inode_pseudo+0x69/0x190 [ 92.210930] ? prune_icache_sb+0x1a0/0x1a0 [ 92.215144] ? down_read+0x150/0x150 [ 92.218834] ? timespec_trunc+0x79/0xe0 [ 92.222780] ? proc_get_inode+0x620/0x620 [ 92.226895] proc_setup_self+0xd9/0x390 [ 92.230839] ? proc_get_inode+0x620/0x620 [ 92.234956] proc_fill_super+0x22b/0x300 [ 92.238985] mount_ns+0xc4/0x190 [ 92.242320] proc_mount+0x7a/0x90 [ 92.245741] mount_fs+0x66/0x2d0 [ 92.249079] vfs_kern_mount.part.26+0xc6/0x4a0 [ 92.253629] ? may_umount+0xa0/0xa0 [ 92.257228] ? idr_alloc_cyclic+0x1d6/0x320 [ 92.261517] ? do_raw_spin_trylock+0x190/0x190 [ 92.266066] ? idr_alloc+0x180/0x180 [ 92.269750] kern_mount_data+0x50/0xb0 [ 92.273605] pid_ns_prepare_proc+0x1e/0x80 [ 92.277816] alloc_pid+0x87e/0xa00 [ 92.281331] ? __change_pid+0x400/0x400 [ 92.285279] ? ns_capable_common+0xcf/0x160 [ 92.289580] ? memset+0x31/0x40 [ 92.292834] ? copy_thread_tls+0x268/0x8f0 [ 92.297044] copy_process.part.38+0x2516/0x4bd0 [ 92.301687] ? __cleanup_sighand+0x40/0x40 [ 92.305892] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 92.311052] ? __lock_acquire+0x664/0x3e00 [ 92.315256] ? trace_hardirqs_off+0x10/0x10 [ 92.319545] ? __lock_is_held+0xb6/0x140 [ 92.323578] ? __lock_is_held+0xb6/0x140 [ 92.327606] ? __account_cfs_rq_runtime+0x600/0x600 [ 92.332593] ? trace_hardirqs_off+0x10/0x10 [ 92.336883] ? trace_hardirqs_off+0x10/0x10 [ 92.341176] ? update_load_avg+0x2eb0/0x2eb0 [ 92.345553] ? __enqueue_entity+0x109/0x1e0 [ 92.349845] ? find_held_lock+0x35/0x1d0 [ 92.353880] ? finish_task_switch+0x1c1/0x7e0 [ 92.358346] ? lock_downgrade+0x980/0x980 [ 92.362465] ? do_raw_spin_trylock+0x190/0x190 [ 92.367020] ? _raw_spin_unlock_irq+0x27/0x70 [ 92.371484] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 92.376469] ? trace_hardirqs_on+0xd/0x10 [ 92.380585] ? _raw_spin_unlock_irq+0x27/0x70 [ 92.385051] ? finish_task_switch+0x182/0x7e0 [ 92.389523] ? __schedule+0x903/0x1ec0 [ 92.393381] ? __sched_text_start+0x8/0x8 [ 92.397497] ? get_pid_task+0xbc/0x140 [ 92.401356] ? proc_fail_nth_write+0x9b/0x1d0 [ 92.405821] ? map_files_get_link+0x3a0/0x3a0 [ 92.410290] ? handle_mm_fault+0x35b/0xb10 [ 92.414497] _do_fork+0x1f7/0xf70 [ 92.417925] ? fork_idle+0x2d0/0x2d0 [ 92.421611] ? wait_for_completion+0x770/0x770 [ 92.426164] ? schedule+0xf5/0x430 [ 92.429675] ? __lock_is_held+0xb6/0x140 [ 92.433705] ? __schedule+0x1ec0/0x1ec0 [ 92.437653] ? __sb_end_write+0xa0/0xd0 [ 92.441597] ? exit_to_usermode_loop+0x8c/0x2f0 [ 92.446236] ? trace_hardirqs_off+0xd/0x10 [ 92.450438] ? exit_to_usermode_loop+0x198/0x2f0 [ 92.455167] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 92.460673] SyS_clone+0x37/0x50 [ 92.464008] ? sys_vfork+0x30/0x30 [ 92.467520] do_syscall_64+0x281/0x940 [ 92.471378] ? vmalloc_sync_all+0x30/0x30 [ 92.475494] ? _raw_spin_unlock_irq+0x27/0x70 [ 92.479956] ? finish_task_switch+0x1c1/0x7e0 [ 92.484421] ? syscall_return_slowpath+0x550/0x550 [ 92.489321] ? syscall_return_slowpath+0x2ac/0x550 [ 92.494218] ? prepare_exit_to_usermode+0x350/0x350 [ 92.499205] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 92.504539] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 92.509354] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 92.514511] RIP: 0033:0x454e79 [ 92.517669] RSP: 002b:00007f19d9d08c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 [ 92.525347] RAX: ffffffffffffffda RBX: 00007f19d9d096d4 RCX: 0000000000454e79 [ 92.532585] RDX: 00000000200008c0 RSI: 0000000020000800 RDI: 000000002000c100 [ 92.539826] RBP: 000000000072bea0 R08: 0000000020000940 R09: 0000000000000000 [ 92.547067] R10: 0000000020000900 R11: 0000000000000246 R12: 0000000000000004 [ 92.554309] R13: 0000000000000051 R14: 00000000006f2838 R15: 0000000000000028 [ 92.561562] CPU: 1 PID: 4489 Comm: syz-executor2 Not tainted 4.16.0-rc7+ #373 [ 92.568830] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 92.578156] Call Trace: [ 92.579615] IPVS: ftp: loaded support on port[0] = 21 [ 92.580714] dump_stack+0x194/0x24d [ 92.580721] ? arch_local_irq_restore+0x53/0x53 [ 92.580731] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 92.599285] should_fail+0x8c0/0xa40 [ 92.602972] ? fault_create_debugfs_attr+0x1f0/0x1f0 [ 92.604783] IPVS: ftp: loaded support on port[0] = 21 [ 92.608048] ? __save_stack_trace+0x7e/0xd0 [ 92.608056] ? mark_held_locks+0xaf/0x100 [ 92.608061] ? __raw_spin_lock_init+0x1c/0x100 [ 92.608068] ? find_held_lock+0x35/0x1d0 [ 92.608074] ? __lock_is_held+0xb6/0x140 [ 92.608084] ? check_same_owner+0x320/0x320 [ 92.632376] IPVS: ftp: loaded support on port[0] = 21 [ 92.634244] ? rcu_note_context_switch+0x710/0x710 [ 92.634254] should_failslab+0xec/0x120 [ 92.634259] kmem_cache_alloc+0x47/0x760 [ 92.634264] ? current_time+0x18/0xc0 [ 92.634270] ? lock_downgrade+0x980/0x980 [ 92.656924] IPVS: ftp: loaded support on port[0] = 21 [ 92.660339] ? proc_get_inode+0x620/0x620 [ 92.660343] __d_alloc+0xc1/0xbd0 [ 92.660349] ? shrink_dcache_for_umount+0x290/0x290 [ 92.660355] ? current_kernel_time64+0x122/0x2f0 [ 92.660360] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 92.660367] ? trace_hardirqs_on+0xd/0x10 [ 92.683114] proc_fill_super: can't allocate /proc/self [ 92.686872] ? current_kernel_time64+0x1d4/0x2f0 [ 92.686879] ? ktime_get_raw+0x380/0x380 [ 92.686884] ? _raw_spin_unlock+0x22/0x30 [ 92.686888] ? new_inode_pseudo+0x134/0x190 [ 92.686893] ? prune_icache_sb+0x1a0/0x1a0 [ 92.686898] ? refcount_inc_not_zero+0xfe/0x180 [ 92.686904] ? timespec_trunc+0x79/0xe0 [ 92.692044] ------------[ cut here ]------------ [ 92.696016] ? set_nlink+0xc1/0x160 [ 92.696022] ? proc_get_inode+0x620/0x620 [ 92.696026] d_make_root+0x3f/0x80 [ 92.696031] proc_fill_super+0x1f6/0x300 [ 92.696036] mount_ns+0xc4/0x190 [ 92.696044] proc_mount+0x7a/0x90 [ 92.701302] refcount_t: underflow; use-after-free. [ 92.706012] mount_fs+0x66/0x2d0 [ 92.706019] vfs_kern_mount.part.26+0xc6/0x4a0 [ 92.706026] ? may_umount+0xa0/0xa0 [ 92.710144] WARNING: CPU: 0 PID: 4482 at lib/refcount.c:187 refcount_sub_and_test+0x167/0x1b0 [ 92.714170] ? idr_alloc_cyclic+0x1d6/0x320 [ 92.714175] ? do_raw_spin_trylock+0x190/0x190 [ 92.718462] Kernel panic - not syncing: panic_on_warn set ... [ 92.718462] [ 92.722670] ? idr_alloc+0x180/0x180 [ 92.803023] kern_mount_data+0x50/0xb0 [ 92.806882] pid_ns_prepare_proc+0x1e/0x80 [ 92.811090] alloc_pid+0x87e/0xa00 [ 92.814599] ? __change_pid+0x400/0x400 [ 92.818542] ? ns_capable_common+0xcf/0x160 [ 92.822837] ? memset+0x31/0x40 [ 92.826085] ? copy_thread_tls+0x268/0x8f0 [ 92.830293] copy_process.part.38+0x2516/0x4bd0 [ 92.834933] ? __cleanup_sighand+0x40/0x40 [ 92.839143] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 92.844303] ? __lock_acquire+0x664/0x3e00 [ 92.848525] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 92.853681] ? environ_open+0x80/0x80 [ 92.857456] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 92.862616] ? __lock_acquire+0x664/0x3e00 [ 92.866818] ? mntput_no_expire+0x130/0xa90 [ 92.871121] ? print_irqtrace_events+0x270/0x270 [ 92.875850] ? trace_hardirqs_off+0x10/0x10 [ 92.880142] ? lock_acquire+0x1d5/0x580 [ 92.884084] ? trace_hardirqs_off+0x10/0x10 [ 92.888372] ? trace_hardirqs_off+0x10/0x10 [ 92.892664] ? __lock_acquire+0x664/0x3e00 [ 92.896865] ? check_same_owner+0x320/0x320 [ 92.901159] ? find_held_lock+0x35/0x1d0 [ 92.905192] ? _parse_integer+0xe9/0x140 [ 92.909222] ? trace_hardirqs_off+0x10/0x10 [ 92.913513] ? _parse_integer+0x140/0x140 [ 92.917630] ? trace_hardirqs_off+0x10/0x10 [ 92.921921] ? get_pid_task+0x93/0x140 [ 92.925780] ? lock_downgrade+0x980/0x980 [ 92.929897] ? find_held_lock+0x35/0x1d0 [ 92.933928] ? __f_unlock_pos+0x19/0x20 [ 92.937872] ? lock_downgrade+0x980/0x980 [ 92.941990] ? get_pid_task+0xbc/0x140 [ 92.945845] ? proc_fail_nth_write+0x9b/0x1d0 [ 92.950308] ? map_files_get_link+0x3a0/0x3a0 [ 92.954772] ? handle_mm_fault+0x35b/0xb10 [ 92.958976] _do_fork+0x1f7/0xf70 [ 92.962399] ? fork_idle+0x2d0/0x2d0 [ 92.966082] ? wait_for_completion+0x770/0x770 [ 92.970636] ? __lock_is_held+0xb6/0x140 [ 92.974673] ? __sb_end_write+0xa0/0xd0 [ 92.978617] ? fput+0xd2/0x140 [ 92.981780] ? SyS_write+0x184/0x220 [ 92.985463] ? SyS_read+0x220/0x220 [ 92.989058] SyS_clone+0x37/0x50 [ 92.992393] ? sys_vfork+0x30/0x30 [ 92.995905] do_syscall_64+0x281/0x940 [ 92.999762] ? vmalloc_sync_all+0x30/0x30 [ 93.003878] ? _raw_spin_unlock_irq+0x27/0x70 [ 93.008341] ? finish_task_switch+0x1c1/0x7e0 [ 93.012806] ? syscall_return_slowpath+0x550/0x550 [ 93.017706] ? syscall_return_slowpath+0x2ac/0x550 [ 93.022602] ? prepare_exit_to_usermode+0x350/0x350 [ 93.027588] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 93.032920] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 93.037732] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 93.042891] RIP: 0033:0x454e79 [ 93.046053] RSP: 002b:00007fac6a5c2c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 [ 93.053728] RAX: ffffffffffffffda RBX: 00007fac6a5c36d4 RCX: 0000000000454e79 [ 93.060969] RDX: 00000000200008c0 RSI: 0000000020000800 RDI: 000000002000c100 [ 93.068207] RBP: 000000000072bea0 R08: 0000000020000940 R09: 0000000000000000 [ 93.075445] R10: 0000000020000900 R11: 0000000000000246 R12: 0000000000000004 [ 93.082683] R13: 0000000000000051 R14: 00000000006f2838 R15: 0000000000000028 [ 93.089937] CPU: 0 PID: 4482 Comm: syz-executor7 Not tainted 4.16.0-rc7+ #373 [ 93.090298] proc_fill_super: allocate dentry failed [ 93.097204] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 93.097206] Call Trace: [ 93.097216] dump_stack+0x194/0x24d [ 93.097223] ? arch_local_irq_restore+0x53/0x53 RESULT: signal 0, coverage 0 errno 2 RESULT: signal 0, coverage 0 errno 2 [ 93.097230] ? vsnprintf+0x1ed/0x1900 [ 93.115987] IPVS: ftp: loaded support on port[0] = 21 [ 93.117681] panic+0x1e4/0x41c [ 93.117687] ? refcount_error_report+0x214/0x214 [ 93.117691] ? show_regs_print_info+0x18/0x18 [ 93.117697] ? vprintk_emit+0xa5f/0xb90 [ 93.147534] ? __warn+0x1c1/0x200 [ 93.150963] ? refcount_sub_and_test+0x167/0x1b0 [ 93.155685] __warn+0x1dc/0x200 [ 93.158933] ? refcount_sub_and_test+0x167/0x1b0 [ 93.163661] report_bug+0x1f4/0x2b0 [ 93.167260] fixup_bug.part.10+0x37/0x80 [ 93.171290] do_error_trap+0x2d7/0x3e0 [ 93.175150] ? vprintk_default+0x28/0x30 [ 93.179181] ? math_error+0x400/0x400 [ 93.182950] ? printk+0xaa/0xca [ 93.186197] ? show_regs_print_info+0x18/0x18 [ 93.190663] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 93.195475] do_invalid_op+0x1b/0x20 [ 93.199156] invalid_op+0x1b/0x40 [ 93.202578] RIP: 0010:refcount_sub_and_test+0x167/0x1b0 [ 93.207907] RSP: 0018:ffff8801b9d9f318 EFLAGS: 00010282 [ 93.213239] RAX: dffffc0000000008 RBX: 0000000000000000 RCX: ffffffff815b193e [ 93.220481] RDX: 0000000000000000 RSI: 1ffff100373b3e13 RDI: 1ffff100373b3de8 [ 93.227721] RBP: ffff8801b9d9f3a8 R08: 0000000000000000 R09: 0000000000000000 [ 93.234961] R10: ffff8801b9d9f2d0 R11: 0000000000000000 R12: 1ffff100373b3e64 [ 93.242198] R13: 00000000ffffffff R14: 0000000000000001 R15: ffff8801b3004720 [ 93.249446] ? vprintk_func+0x5e/0xc0 [ 93.253218] ? refcount_sub_and_test+0x167/0x1b0 [ 93.257944] ? refcount_inc+0x50/0x50 [ 93.261713] ? refcount_inc+0x50/0x50 [ 93.265483] ? ns_capable_common+0xcf/0x160 [ 93.269778] refcount_dec_and_test+0x1a/0x20 [ 93.274158] put_pid_ns+0x9d/0xc0 [ 93.277581] free_nsproxy+0xfa/0x1f0 [ 93.281265] switch_task_namespaces+0x9d/0xc0 [ 93.285731] exit_task_namespaces+0x17/0x20 [ 93.290022] copy_process.part.38+0x3aba/0x4bd0 [ 93.294663] ? __cleanup_sighand+0x40/0x40 [ 93.298872] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 93.304034] ? __lock_acquire+0x664/0x3e00 [ 93.308240] ? unwind_dump+0x4d0/0x4d0 [ 93.312100] ? rcutorture_record_progress+0x10/0x10 [ 93.317089] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 93.322248] ? kernel_text_address+0xd1/0xe0 [ 93.326624] ? __unwind_start+0x169/0x330 [ 93.330739] ? __kernel_text_address+0xd/0x40 [ 93.335204] ? unwind_get_return_address+0x61/0xa0 [ 93.340104] ? __save_stack_trace+0x7e/0xd0 [ 93.344396] ? add_lock_to_list.isra.29+0x24d/0x352 [ 93.349383] ? print_lockdep_cache.isra.32+0x109/0x109 [ 93.354629] ? trace_hardirqs_off+0x10/0x10 [ 93.358919] ? save_stack_trace+0x1a/0x20 [ 93.363040] ? __lock_acquire+0x36c0/0x3e00 [ 93.367334] ? check_same_owner+0x320/0x320 [ 93.371624] ? find_held_lock+0x35/0x1d0 [ 93.375657] ? _parse_integer+0xe9/0x140 [ 93.379687] ? trace_hardirqs_off+0x10/0x10 [ 93.383978] ? _parse_integer+0x140/0x140 [ 93.388100] ? trace_hardirqs_off+0x10/0x10 [ 93.392393] ? get_pid_task+0x93/0x140 [ 93.396248] ? lock_downgrade+0x980/0x980 [ 93.400368] ? find_held_lock+0x35/0x1d0 [ 93.404400] ? __f_unlock_pos+0x19/0x20 [ 93.408353] ? lock_downgrade+0x980/0x980 [ 93.412470] ? get_pid_task+0xbc/0x140 [ 93.416326] ? proc_fail_nth_write+0x9b/0x1d0 [ 93.420789] ? map_files_get_link+0x3a0/0x3a0 [ 93.425255] _do_fork+0x1f7/0xf70 [ 93.428679] ? fork_idle+0x2d0/0x2d0 [ 93.432361] ? wait_for_completion+0x770/0x770 [ 93.436914] ? __lock_is_held+0xb6/0x140 [ 93.440952] ? __sb_end_write+0xa0/0xd0 [ 93.444895] ? fput+0xd2/0x140 [ 93.448063] ? SyS_write+0x184/0x220 [ 93.451745] ? SyS_read+0x220/0x220 [ 93.455349] SyS_clone+0x37/0x50 [ 93.458683] ? sys_vfork+0x30/0x30 [ 93.462193] do_syscall_64+0x281/0x940 [ 93.466054] ? vmalloc_sync_all+0x30/0x30 [ 93.470169] ? _raw_spin_unlock_irq+0x27/0x70 [ 93.474631] ? finish_task_switch+0x1c1/0x7e0 [ 93.479097] ? syscall_return_slowpath+0x550/0x550 [ 93.483996] ? syscall_return_slowpath+0x2ac/0x550 [ 93.488894] ? prepare_exit_to_usermode+0x350/0x350 [ 93.493880] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 93.499216] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 93.504029] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 93.509190] RIP: 0033:0x454e79 [ 93.512348] RSP: 002b:00007fd1669b7c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 [ 93.520024] RAX: ffffffffffffffda RBX: 00007fd1669b86d4 RCX: 0000000000454e79 [ 93.527266] RDX: 00000000200008c0 RSI: 0000000020000800 RDI: 000000002000c100 [ 93.534505] RBP: 000000000072bea0 R08: 0000000020000940 R09: 0000000000000000 [ 93.541742] R10: 0000000020000900 R11: 0000000000000246 R12: 0000000000000004 [ 93.548979] R13: 0000000000000051 R14: 00000000006f2838 R15: 0000000000000028 [ 93.556645] Dumping ftrace buffer: [ 93.560235] (ftrace buffer empty) [ 93.563915] Kernel Offset: disabled [ 93.567515] Rebooting in 86400 seconds..