[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. [ 17.106588] sshd (4437) used greatest stack depth: 16376 bytes left Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.39' (ECDSA) to the list of known hosts. 2018/04/05 15:35:27 parsed 1 programs 2018/04/05 15:35:27 executed programs: 0 syzkaller login: [ 23.839676] IPVS: ftp: loaded support on port[0] = 21 [ 23.882331] IPVS: ftp: loaded support on port[0] = 21 [ 23.922730] IPVS: ftp: loaded support on port[0] = 21 [ 23.923805] FAULT_INJECTION: forcing a failure. [ 23.923805] name failslab, interval 1, probability 0, space 0, times 1 [ 23.939301] CPU: 1 PID: 4479 Comm: syz-executor0 Not tainted 4.16.0+ #288 [ 23.946222] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.955569] Call Trace: [ 23.958154] dump_stack+0x1a7/0x27d [ 23.961777] ? arch_local_irq_restore+0x53/0x53 [ 23.966447] should_fail+0x914/0xae0 [ 23.970157] ? fault_create_debugfs_attr+0x1f0/0x1f0 [ 23.975257] ? find_next_zero_bit+0xe3/0x110 [ 23.979560] FAULT_INJECTION: forcing a failure. [ 23.979560] name failslab, interval 1, probability 0, space 0, times 1 [ 23.979660] ? trace_hardirqs_off+0x10/0x10 [ 23.979677] ? find_held_lock+0x35/0x1d0 [ 23.979689] ? __lock_is_held+0xb6/0x140 [ 24.003276] ? check_same_owner+0x320/0x320 [ 24.007583] ? lock_downgrade+0x980/0x980 [ 24.011715] ? rcu_note_context_switch+0x710/0x710 [ 24.016628] ? find_held_lock+0x35/0x1d0 [ 24.020679] should_failslab+0xec/0x120 [ 24.024637] __kmalloc+0x63/0x760 [ 24.028073] ? lock_downgrade+0x980/0x980 [ 24.032204] ? register_shrinker+0x10e/0x2d0 [ 24.036593] ? trace_event_raw_event_module_request+0x320/0x320 [ 24.042635] register_shrinker+0x10e/0x2d0 [ 24.046852] ? prepare_kswapd_sleep+0x1f0/0x1f0 [ 24.051502] ? memcpy+0x45/0x50 [ 24.054766] sget_userns+0xbdd/0xe60 [ 24.058458] ? set_anon_super+0x20/0x20 [ 24.062418] ? put_filp+0xa0/0xa0 [ 24.065856] ? destroy_unused_super.part.7+0xf0/0xf0 [ 24.070942] ? __alloc_pages_slowpath+0x2d30/0x2d30 [ 24.075945] ? save_stack+0xa3/0xd0 [ 24.079552] ? save_stack+0x43/0xd0 [ 24.083160] ? kasan_slab_alloc+0x12/0x20 [ 24.087293] ? kmem_cache_alloc+0x12e/0x760 [ 24.091594] ? alloc_pid+0xc1/0xa10 [ 24.095206] ? __radix_tree_replace+0x1af/0x310 [ 24.099859] ? radix_tree_delete+0x30/0x30 [ 24.104075] ? node_tag_clear+0xf2/0x180 [ 24.108126] ? proc_get_inode+0x620/0x620 [ 24.112255] mount_ns+0x6d/0x190 [ 24.115604] proc_mount+0x7a/0x90 [ 24.119040] mount_fs+0x66/0x2d0 [ 24.122390] vfs_kern_mount.part.26+0xc6/0x4a0 [ 24.126955] ? may_umount+0xa0/0xa0 [ 24.130561] ? kasan_check_read+0x11/0x20 [ 24.134693] ? do_raw_spin_unlock+0x9e/0x310 [ 24.139083] ? do_raw_spin_trylock+0x1a0/0x1a0 [ 24.143644] ? idr_alloc+0x180/0x180 [ 24.147344] kern_mount_data+0x50/0xb0 [ 24.151217] pid_ns_prepare_proc+0x1e/0x80 [ 24.155430] alloc_pid+0x88e/0xa10 [ 24.158955] ? __change_pid+0x400/0x400 [ 24.162918] ? ns_capable_common+0xcf/0x160 [ 24.167236] ? memset+0x31/0x40 [ 24.170498] ? copy_thread_tls+0x268/0x8f0 [ 24.174719] copy_process.part.38+0x274c/0x6140 [ 24.179369] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 24.184540] ? _raw_spin_unlock_irqrestore+0x31/0xc0 [ 24.189628] ? check_usage+0x22f/0xb60 [ 24.193501] ? lock_acquire+0x1d5/0x580 [ 24.197453] ? lock_acquire+0x1d5/0x580 [ 24.201419] ? __cleanup_sighand+0x50/0x50 [ 24.205637] ? graph_lock+0x170/0x170 [ 24.209432] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 24.214610] ? kasan_check_read+0x11/0x20 [ 24.218740] ? print_irqtrace_events+0x270/0x270 [ 24.223488] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 24.228660] ? __lock_acquire+0x638/0x3c30 [ 24.232878] ? kasan_check_read+0x11/0x20 [ 24.237007] ? rcu_is_watching+0x85/0x130 [ 24.241146] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 24.246315] ? __unwind_start+0x169/0x330 [ 24.250443] ? __kernel_text_address+0xd/0x40 [ 24.254921] ? unwind_get_return_address+0x61/0xa0 [ 24.259837] ? __save_stack_trace+0x7e/0xd0 [ 24.264143] ? add_lock_to_list.isra.29+0x24d/0x352 [ 24.269142] ? print_lockdep_cache.isra.32+0x109/0x109 [ 24.274399] ? trace_hardirqs_off+0x10/0x10 [ 24.278702] ? save_stack_trace+0x1a/0x20 [ 24.282834] ? kasan_check_read+0x11/0x20 [ 24.286961] ? __lock_acquire+0x2684/0x3c30 [ 24.291265] ? check_same_owner+0x320/0x320 [ 24.295575] ? find_held_lock+0x35/0x1d0 [ 24.299622] ? trace_hardirqs_off+0x10/0x10 [ 24.303923] ? _parse_integer+0xe9/0x140 [ 24.307968] ? trace_hardirqs_off+0x10/0x10 [ 24.312273] ? _parse_integer+0x140/0x140 [ 24.316400] ? check_same_owner+0x320/0x320 [ 24.320708] ? find_held_lock+0x35/0x1d0 [ 24.324754] ? trace_hardirqs_off+0x10/0x10 [ 24.329059] ? get_pid_task+0xa5/0x150 [ 24.332929] ? lock_downgrade+0x980/0x980 [ 24.337067] ? find_held_lock+0x35/0x1d0 [ 24.341116] ? __f_unlock_pos+0x19/0x20 [ 24.345075] ? lock_downgrade+0x980/0x980 [ 24.349210] ? kasan_check_write+0x14/0x20 [ 24.353426] ? proc_fail_nth_write+0x9b/0x1e0 [ 24.357906] ? map_files_get_link+0x3b0/0x3b0 [ 24.362386] ? trace_hardirqs_off+0x10/0x10 [ 24.366699] ? find_held_lock+0x35/0x1d0 [ 24.370751] _do_fork+0x1f7/0xfa0 [ 24.374194] ? fork_idle+0x2d0/0x2d0 [ 24.377893] ? __lock_is_held+0xb6/0x140 [ 24.381948] ? __sb_end_write+0xa0/0xd0 [ 24.385911] ? kasan_check_write+0x14/0x20 [ 24.390130] ? fput+0xe0/0x150 [ 24.393306] ? ksys_write+0x184/0x220 [ 24.397095] ? SyS_read+0x30/0x30 [ 24.400539] compat_SyS_x86_clone+0x3b/0x50 [ 24.404849] ? compat_SyS_x86_fallocate+0x60/0x60 [ 24.409686] do_fast_syscall_32+0x3ec/0xf9f [ 24.413996] ? do_int80_syscall_32+0x9c0/0x9c0 [ 24.418562] ? finish_task_switch+0x1b9/0x970 [ 24.423041] ? finish_task_switch+0x17a/0x970 [ 24.427525] ? syscall_return_slowpath+0x2ac/0x550 [ 24.432437] ? prepare_exit_to_usermode+0x350/0x350 [ 24.437438] ? sysret32_from_system_call+0x5/0x3c [ 24.442270] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 24.447102] entry_SYSENTER_compat+0x70/0x7f [ 24.451496] RIP: 0023:0xf7f3ac99 [ 24.454844] RSP: 002b:00000000f7f360ac EFLAGS: 00000282 ORIG_RAX: 0000000000000078 [ 24.462536] RAX: ffffffffffffffda RBX: 00000000201043f9 RCX: 0000000020e02000 [ 24.469788] RDX: 000000002006fffc RSI: 0000000020000180 RDI: 0000000020000080 [ 24.477041] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 24.484294] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 24.491548] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 24.498817] CPU: 0 PID: 4482 Comm: syz-executor7 Not tainted 4.16.0+ #288 [ 24.505679] IPVS: ftp: loaded support on port[0] = 21 [ 24.505738] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.520246] Call Trace: [ 24.522827] dump_stack+0x1a7/0x27d [ 24.526450] ? arch_local_irq_restore+0x53/0x53 [ 24.531114] ? trace_hardirqs_off+0x10/0x10 [ 24.535427] ? trace_hardirqs_off+0x10/0x10 [ 24.539759] should_fail+0x914/0xae0 [ 24.541321] ------------[ cut here ]------------ [ 24.543465] ? fault_create_debugfs_attr+0x1f0/0x1f0 [ 24.543474] ? find_held_lock+0x35/0x1d0 [ 24.543486] ? wait_for_completion+0x770/0x770 [ 24.543497] ? freezer_fork+0x30c/0x4f0 [ 24.548251] refcount_t: underflow; use-after-free. [ 24.553317] ? find_held_lock+0x35/0x1d0 [ 24.553328] ? __lock_is_held+0xb6/0x140 [ 24.553346] ? check_same_owner+0x320/0x320 [ 24.557500] WARNING: CPU: 1 PID: 4479 at lib/refcount.c:187 refcount_sub_and_test+0x242/0x280 [ 24.561932] ? rcu_note_context_switch+0x710/0x710 [ 24.565874] Kernel panic - not syncing: panic_on_warn set ... [ 24.565874] [ 24.570782] should_failslab+0xec/0x120 [ 24.607942] kmem_cache_alloc+0x47/0x760 [ 24.611987] ? __might_sleep+0x95/0x190 [ 24.615944] __anon_vma_prepare+0xbc/0x6e0 [ 24.620161] ? anon_vma_fork+0x8c0/0x8c0 [ 24.624200] ? print_irqtrace_events+0x270/0x270 [ 24.628939] ? copy_process.part.38+0x352/0x6140 [ 24.633670] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 24.638839] do_huge_pmd_anonymous_page+0x1099/0x1a80 [ 24.644015] ? __thp_get_unmapped_area+0x130/0x130 [ 24.648932] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 24.654107] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 24.659274] ? lock_downgrade+0x980/0x980 [ 24.663404] ? print_irqtrace_events+0x270/0x270 [ 24.668140] ? kasan_check_read+0x11/0x20 [ 24.672267] ? rcu_is_watching+0x85/0x130 [ 24.676396] ? print_irqtrace_events+0x270/0x270 [ 24.681138] __handle_mm_fault+0x17ac/0x38e0 [ 24.685529] ? __pmd_alloc+0x4f0/0x4f0 [ 24.689397] ? trace_hardirqs_off+0x10/0x10 [ 24.694375] ? __lock_acquire+0x638/0x3c30 [ 24.698590] ? find_held_lock+0x35/0x1d0 [ 24.702633] ? handle_mm_fault+0x35b/0xb20 [ 24.706846] ? lock_downgrade+0x980/0x980 [ 24.710982] ? handle_mm_fault+0x2f8/0xb20 [ 24.715197] handle_mm_fault+0x44a/0xb20 [ 24.719239] ? check_same_owner+0x320/0x320 [ 24.723544] ? __handle_mm_fault+0x38e0/0x38e0 [ 24.728101] ? vmacache_find+0x5f/0x280 [ 24.732053] ? vmacache_update+0xfe/0x130 [ 24.736179] ? find_vma+0x30/0x150 [ 24.739701] __do_page_fault+0x560/0xbe0 [ 24.743746] ? mm_fault_error+0x2c0/0x2c0 [ 24.747878] ? trace_hardirqs_off+0x10/0x10 [ 24.752179] do_page_fault+0xee/0x730 [ 24.755957] ? find_held_lock+0x35/0x1d0 [ 24.759995] ? vmalloc_sync_all+0x30/0x30 [ 24.764123] ? find_held_lock+0x35/0x1d0 [ 24.768165] ? __might_fault+0x110/0x1d0 [ 24.772209] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 24.777034] page_fault+0x25/0x50 [ 24.780466] RIP: 0010:__put_user_4+0x1c/0x30 [ 24.784854] RSP: 0018:ffff8801acc87b40 EFLAGS: 00010297 [ 24.790195] RAX: 0000000000000004 RBX: 00007fffffffeffd RCX: 000000002006fffc [ 24.797444] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000282 [ 24.804690] RBP: ffff8801acc87d78 R08: 0000000000000000 R09: 1ffff10035990f45 [ 24.811936] R10: ffff8801acc879f0 R11: 0000000000000000 R12: 00000000201043f9 [ 24.819183] R13: ffff8801ac748080 R14: 0000000000000000 R15: 0000000000000004 [ 24.826441] ? _do_fork+0x95c/0xfa0 [ 24.830046] ? fork_idle+0x2d0/0x2d0 [ 24.833744] ? __lock_is_held+0xb6/0x140 [ 24.837793] ? __sb_end_write+0xa0/0xd0 [ 24.841747] ? kasan_check_write+0x14/0x20 [ 24.845956] ? fput+0xe0/0x150 [ 24.849128] ? ksys_write+0x184/0x220 [ 24.852906] ? SyS_read+0x30/0x30 [ 24.856343] compat_SyS_x86_clone+0x3b/0x50 [ 24.860645] ? compat_SyS_x86_fallocate+0x60/0x60 [ 24.865469] do_fast_syscall_32+0x3ec/0xf9f [ 24.869772] ? do_int80_syscall_32+0x9c0/0x9c0 [ 24.874330] ? finish_task_switch+0x1b9/0x970 [ 24.878801] ? finish_task_switch+0x17a/0x970 [ 24.883277] ? syscall_return_slowpath+0x2ac/0x550 [ 24.888184] ? prepare_exit_to_usermode+0x350/0x350 [ 24.894046] ? sysret32_from_system_call+0x5/0x3c [ 24.898872] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 24.903695] entry_SYSENTER_compat+0x70/0x7f [ 24.908081] RIP: 0023:0xf7f04c99 [ 24.911421] RSP: 002b:00000000f7f000ac EFLAGS: 00000282 ORIG_RAX: 0000000000000078 [ 24.919107] RAX: ffffffffffffffda RBX: 00000000201043f9 RCX: 0000000020e02000 [ 24.926357] RDX: 000000002006fffc RSI: 0000000020000180 RDI: 0000000020000080 [ 24.933606] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 24.940855] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 24.948100] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 24.955362] CPU: 1 PID: 4479 Comm: syz-executor0 Not tainted 4.16.0+ #288 [ 24.962289] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.963684] IPVS: ftp: loaded support on port[0] = 21 [ 24.971627] Call Trace: [ 24.971640] dump_stack+0x1a7/0x27d [ 24.971651] ? arch_local_irq_restore+0x53/0x53 [ 24.971662] ? vsnprintf+0x1ed/0x1900 [ 24.971673] panic+0x1f8/0x42c [ 24.971680] ? refcount_error_report+0x214/0x214 [ 24.971689] ? show_regs_print_info+0x18/0x18 [ 25.003846] ? vprintk_emit+0xa5f/0xb90 [ 25.007829] ? __warn+0x1c1/0x200 [ 25.009385] IPVS: ftp: loaded support on port[0] = 21 [ 25.011272] ? refcount_sub_and_test+0x242/0x280 [ 25.011280] __warn+0x1dc/0x200 [ 25.011292] ? refcount_sub_and_test+0x242/0x280 [ 25.029193] report_bug+0x1f4/0x2b0 [ 25.032815] fixup_bug.part.10+0x37/0x80 [ 25.036866] do_error_trap+0x2d7/0x3e0 [ 25.040744] ? vprintk_default+0x28/0x30 [ 25.044794] ? math_error+0x400/0x400 [ 25.046243] IPVS: ftp: loaded support on port[0] = 21 [ 25.048580] ? printk+0xaa/0xca [ 25.048589] ? show_regs_print_info+0x18/0x18 [ 25.048596] ? do_raw_spin_lock+0xc1/0x230 [ 25.048610] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.070546] do_invalid_op+0x1b/0x20 [ 25.074251] invalid_op+0x1b/0x40 [ 25.077699] RIP: 0010:refcount_sub_and_test+0x242/0x280 [ 25.083048] RSP: 0018:ffff8801ad647070 EFLAGS: 00010282 [ 25.088401] RAX: dffffc0000000008 RBX: 00000000ffffffff RCX: ffffffff815b324e [ 25.089587] IPVS: ftp: loaded support on port[0] = 21 [ 25.095657] RDX: 0000000000000000 RSI: 1ffff10035ac8dbe RDI: 1ffff10035ac8d93 [ 25.095662] RBP: ffff8801ad647148 R08: 0000000000000000 R09: 0000000000000000 [ 25.095667] R10: 0000000000000001 R11: 0000000000000000 R12: ffff8801d9a53850 RESULT: signal 0, coverage 0 errno -1 [ 25.095673] R13: 1ffff10035ac8e10 R14: ffff8801ad6470a0 R15: ffff8801ad647120 [ 25.095689] ? vprintk_func+0x5e/0xc0 [ 25.095707] ? refcount_inc_not_zero+0x280/0x280 [ 25.138389] ? refcount_inc_not_zero+0x280/0x280 [ 25.138918] FAULT_INJECTION: forcing a failure. [ 25.138918] name failslab, interval 1, probability 0, space 0, times 0 [ 25.143131] ? lock_release+0xa40/0xa40 [ 25.143143] ? kasan_check_read+0x11/0x20 [ 25.143151] ? do_raw_spin_unlock+0x9e/0x310 [ 25.143164] refcount_dec_and_test+0x1a/0x20 [ 25.143175] put_pid_ns+0x9d/0xc0 [ 25.143185] free_nsproxy+0xfa/0x1f0 [ 25.143201] switch_task_namespaces+0xaa/0xc0 [ 25.182817] exit_task_namespaces+0x17/0x20 [ 25.187127] copy_process.part.38+0x415b/0x6140 [ 25.191781] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 25.196954] ? _raw_spin_unlock_irqrestore+0x31/0xc0 [ 25.202043] ? check_usage+0x22f/0xb60 [ 25.205913] ? lock_acquire+0x1d5/0x580 [ 25.209872] ? lock_acquire+0x1d5/0x580 [ 25.213836] ? __cleanup_sighand+0x50/0x50 [ 25.218053] ? graph_lock+0x170/0x170 [ 25.221847] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 25.227023] ? kasan_check_read+0x11/0x20 [ 25.231152] ? print_irqtrace_events+0x270/0x270 [ 25.235898] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 25.241073] ? __lock_acquire+0x638/0x3c30 [ 25.245291] ? kasan_check_read+0x11/0x20 [ 25.249423] ? rcu_is_watching+0x85/0x130 [ 25.253558] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 25.258729] ? __unwind_start+0x169/0x330 [ 25.262861] ? __kernel_text_address+0xd/0x40 [ 25.267336] ? unwind_get_return_address+0x61/0xa0 [ 25.272250] ? __save_stack_trace+0x7e/0xd0 [ 25.276555] ? add_lock_to_list.isra.29+0x24d/0x352 [ 25.281554] ? print_lockdep_cache.isra.32+0x109/0x109 [ 25.286816] ? trace_hardirqs_off+0x10/0x10 [ 25.291117] ? save_stack_trace+0x1a/0x20 [ 25.295248] ? kasan_check_read+0x11/0x20 [ 25.299377] ? __lock_acquire+0x2684/0x3c30 [ 25.303682] ? check_same_owner+0x320/0x320 [ 25.307990] ? find_held_lock+0x35/0x1d0 [ 25.312040] ? trace_hardirqs_off+0x10/0x10 [ 25.316341] ? _parse_integer+0xe9/0x140 [ 25.320389] ? trace_hardirqs_off+0x10/0x10 [ 25.324694] ? _parse_integer+0x140/0x140 [ 25.328823] ? check_same_owner+0x320/0x320 [ 25.333130] ? find_held_lock+0x35/0x1d0 [ 25.337263] ? trace_hardirqs_off+0x10/0x10 [ 25.341569] ? get_pid_task+0xa5/0x150 [ 25.345441] ? lock_downgrade+0x980/0x980 [ 25.349576] ? find_held_lock+0x35/0x1d0 [ 25.353628] ? __f_unlock_pos+0x19/0x20 [ 25.357584] ? lock_downgrade+0x980/0x980 [ 25.361714] ? kasan_check_write+0x14/0x20 [ 25.365932] ? proc_fail_nth_write+0x9b/0x1e0 [ 25.370410] ? map_files_get_link+0x3b0/0x3b0 [ 25.374890] ? trace_hardirqs_off+0x10/0x10 [ 25.379201] ? find_held_lock+0x35/0x1d0 [ 25.383249] _do_fork+0x1f7/0xfa0 [ 25.386688] ? fork_idle+0x2d0/0x2d0 [ 25.390387] ? __lock_is_held+0xb6/0x140 [ 25.394439] ? __sb_end_write+0xa0/0xd0 [ 25.398395] ? kasan_check_write+0x14/0x20 [ 25.402608] ? fput+0xe0/0x150 [ 25.405781] ? ksys_write+0x184/0x220 [ 25.409564] ? SyS_read+0x30/0x30 [ 25.413004] compat_SyS_x86_clone+0x3b/0x50 [ 25.417311] ? compat_SyS_x86_fallocate+0x60/0x60 [ 25.422135] do_fast_syscall_32+0x3ec/0xf9f [ 25.426443] ? do_int80_syscall_32+0x9c0/0x9c0 [ 25.431007] ? finish_task_switch+0x1b9/0x970 [ 25.435481] ? finish_task_switch+0x17a/0x970 [ 25.439962] ? syscall_return_slowpath+0x2ac/0x550 [ 25.444960] ? prepare_exit_to_usermode+0x350/0x350 [ 25.449961] ? sysret32_from_system_call+0x5/0x3c [ 25.454790] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.459616] entry_SYSENTER_compat+0x70/0x7f [ 25.464003] RIP: 0023:0xf7f3ac99 [ 25.467347] RSP: 002b:00000000f7f360ac EFLAGS: 00000282 ORIG_RAX: 0000000000000078 [ 25.475040] RAX: ffffffffffffffda RBX: 00000000201043f9 RCX: 0000000020e02000 [ 25.482290] RDX: 000000002006fffc RSI: 0000000020000180 RDI: 0000000020000080 [ 25.489541] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 25.496793] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 25.504044] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 25.511309] CPU: 0 PID: 4487 Comm: syz-executor7 Not tainted 4.16.0+ #288 [ 25.518226] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.527550] Call Trace: [ 25.530112] dump_stack+0x1a7/0x27d [ 25.533715] ? arch_local_irq_restore+0x53/0x53 [ 25.538365] should_fail+0x914/0xae0 [ 25.542053] ? fault_create_debugfs_attr+0x1f0/0x1f0 [ 25.547130] ? trace_hardirqs_off+0x10/0x10 [ 25.551428] ? __lockdep_init_map+0xe4/0x650 [ 25.555813] ? __lockdep_init_map+0xe4/0x650 [ 25.560197] ? d_set_d_op+0x30b/0x400 [ 25.563973] ? find_held_lock+0x35/0x1d0 [ 25.568010] ? __lock_is_held+0xb6/0x140 [ 25.572054] ? check_same_owner+0x320/0x320 [ 25.576352] ? do_raw_spin_unlock+0x9e/0x310 [ 25.580739] ? rcu_note_context_switch+0x710/0x710 [ 25.585646] should_failslab+0xec/0x120 [ 25.589599] kmem_cache_alloc+0x47/0x760 [ 25.593635] ? __d_alloc+0xbd0/0xbd0 [ 25.597326] ? proc_i_callback+0x30/0x30 [ 25.601360] ? proc_get_inode+0x620/0x620 [ 25.605481] proc_alloc_inode+0x1b/0x190 [ 25.609514] alloc_inode+0x65/0x180 [ 25.613115] new_inode_pseudo+0x69/0x190 [ 25.617155] ? prune_icache_sb+0x1a0/0x1a0 [ 25.621362] ? down_read+0x1b0/0x1b0 [ 25.625056] ? proc_get_inode+0x620/0x620 [ 25.629178] proc_setup_thread_self+0xd9/0x390 [ 25.633743] ? proc_get_inode+0x620/0x620 [ 25.637864] proc_fill_super+0x250/0x310 [ 25.641900] mount_ns+0xc4/0x190 [ 25.645245] proc_mount+0x7a/0x90 [ 25.648675] mount_fs+0x66/0x2d0 [ 25.652017] vfs_kern_mount.part.26+0xc6/0x4a0 [ 25.656573] ? may_umount+0xa0/0xa0 [ 25.660176] ? kasan_check_read+0x11/0x20 [ 25.664297] ? do_raw_spin_unlock+0x9e/0x310 [ 25.668680] ? do_raw_spin_trylock+0x1a0/0x1a0 [ 25.673235] ? idr_alloc+0x180/0x180 [ 25.676925] kern_mount_data+0x50/0xb0 [ 25.680788] pid_ns_prepare_proc+0x1e/0x80 [ 25.685001] alloc_pid+0x88e/0xa10 [ 25.688517] ? __change_pid+0x400/0x400 [ 25.692466] ? ns_capable_common+0xcf/0x160 [ 25.696854] ? memset+0x31/0x40 [ 25.700109] ? copy_thread_tls+0x268/0x8f0 [ 25.704317] ? do_raw_spin_lock+0xc1/0x230 [ 25.708533] copy_process.part.38+0x274c/0x6140 [ 25.713180] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 25.718345] ? _raw_spin_unlock_irqrestore+0x31/0xc0 [ 25.723425] ? print_irqtrace_events+0x270/0x270 [ 25.728160] ? lock_acquire+0x1d5/0x580 [ 25.732106] ? lock_acquire+0x1d5/0x580 [ 25.736054] ? alloc_set_pte+0xf74/0x1780 [ 25.740182] ? __cleanup_sighand+0x50/0x50 [ 25.744391] ? print_irqtrace_events+0x270/0x270 [ 25.749131] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 25.754295] ? lock_downgrade+0x980/0x980 [ 25.758420] ? print_irqtrace_events+0x270/0x270 [ 25.763149] ? kasan_check_read+0x11/0x20 [ 25.767275] ? rcu_is_watching+0x85/0x130 [ 25.771405] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 25.776570] ? __lock_acquire+0x638/0x3c30 [ 25.780780] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 25.785953] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 25.791119] ? print_irqtrace_events+0x270/0x270 [ 25.795850] ? __pagevec_lru_add+0x30/0x30 [ 25.800065] ? lock_acquire+0x1d5/0x580 [ 25.804013] ? trace_hardirqs_off+0x10/0x10 [ 25.808313] ? __lock_acquire+0x638/0x3c30 [ 25.812524] ? check_same_owner+0x320/0x320 [ 25.816827] ? find_held_lock+0x35/0x1d0 [ 25.820868] ? trace_hardirqs_off+0x10/0x10 [ 25.825162] ? _parse_integer+0xe9/0x140 [ 25.829201] ? trace_hardirqs_off+0x10/0x10 [ 25.833496] ? _parse_integer+0x140/0x140 [ 25.837617] ? check_same_owner+0x320/0x320 [ 25.841917] ? find_held_lock+0x35/0x1d0 [ 25.845956] ? trace_hardirqs_off+0x10/0x10 [ 25.850253] ? get_pid_task+0xa5/0x150 [ 25.854115] ? lock_downgrade+0x980/0x980 [ 25.858241] ? find_held_lock+0x35/0x1d0 [ 25.862279] ? __f_unlock_pos+0x19/0x20 [ 25.866235] ? lock_downgrade+0x980/0x980 [ 25.870359] ? kasan_check_write+0x14/0x20 [ 25.874568] ? proc_fail_nth_write+0x9b/0x1e0 [ 25.879037] ? map_files_get_link+0x3b0/0x3b0 [ 25.883506] ? trace_hardirqs_off+0x10/0x10 [ 25.887804] ? find_held_lock+0x35/0x1d0 [ 25.891839] _do_fork+0x1f7/0xfa0 [ 25.895273] ? fork_idle+0x2d0/0x2d0 [ 25.898963] ? __lock_is_held+0xb6/0x140 [ 25.903010] ? __sb_end_write+0xa0/0xd0 [ 25.906960] ? kasan_check_write+0x14/0x20 [ 25.911168] ? fput+0xe0/0x150 [ 25.914334] ? ksys_write+0x184/0x220 [ 25.918109] ? SyS_read+0x30/0x30 [ 25.921543] compat_SyS_x86_clone+0x3b/0x50 [ 25.925842] ? compat_SyS_x86_fallocate+0x60/0x60 [ 25.930663] do_fast_syscall_32+0x3ec/0xf9f [ 25.934962] ? do_int80_syscall_32+0x9c0/0x9c0 [ 25.939519] ? finish_task_switch+0x1b9/0x970 [ 25.943988] ? finish_task_switch+0x17a/0x970 [ 25.948462] ? syscall_return_slowpath+0x2ac/0x550 [ 25.953369] ? prepare_exit_to_usermode+0x350/0x350 [ 25.958362] ? sysret32_from_system_call+0x5/0x3c [ 25.963185] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.968005] entry_SYSENTER_compat+0x70/0x7f [ 25.972397] RIP: 0023:0xf7f04c99 [ 25.975744] RSP: 002b:00000000f7f000ac EFLAGS: 00000282 ORIG_RAX: 0000000000000078 [ 25.983432] RAX: ffffffffffffffda RBX: 00000000201043f9 RCX: 0000000020e02000 [ 25.990676] RDX: 000000002006fffc RSI: 0000000020000180 RDI: 0000000020000080 [ 25.997920] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 26.005166] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 26.012410] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 26.020077] Dumping ftrace buffer: [ 26.023751] (ftrace buffer empty) [ 26.027436] Kernel Offset: disabled [ 26.031042] Rebooting in 86400 seconds..