[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.708448] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.565187] random: sshd: uninitialized urandom read (32 bytes read) [ 24.128252] random: sshd: uninitialized urandom read (32 bytes read) [ 24.904447] random: sshd: uninitialized urandom read (32 bytes read) [ 25.059874] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.48' (ECDSA) to the list of known hosts. [ 30.487470] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program [ 30.587148] FAT-fs (loop0): bogus number of reserved sectors [ 30.593154] FAT-fs (loop0): Can't find a valid FAT filesystem [ 30.611902] FAT-fs (loop0): bogus number of reserved sectors [ 30.617898] FAT-fs (loop0): Can't find a valid FAT filesystem [ 30.634681] FAULT_INJECTION: forcing a failure. [ 30.634681] name failslab, interval 1, probability 0, space 0, times 1 [ 30.646175] CPU: 0 PID: 4498 Comm: syz-executor500 Not tainted 4.17.0-rc5+ #54 [ 30.653558] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.662899] Call Trace: [ 30.665504] dump_stack+0x1b9/0x294 [ 30.669132] ? dump_stack_print_info.cold.2+0x52/0x52 [ 30.674350] should_fail.cold.4+0xa/0x1a [ 30.678400] ? perf_trace_run_bpf_submit+0x23f/0x370 [ 30.683491] ? fault_create_debugfs_attr+0x1f0/0x1f0 [ 30.688581] ? perf_tp_event+0xc30/0xc30 [ 30.692719] ? graph_lock+0x170/0x170 [ 30.696516] ? find_held_lock+0x36/0x1c0 [ 30.700614] ? check_same_owner+0x320/0x320 [ 30.704940] ? graph_lock+0x170/0x170 [ 30.708730] ? rcu_note_context_switch+0x710/0x710 [ 30.713645] ? kasan_check_read+0x11/0x20 [ 30.717779] ? do_raw_spin_unlock+0x9e/0x2e0 [ 30.722177] __should_failslab+0x124/0x180 [ 30.726401] should_failslab+0x9/0x14 [ 30.730201] kmem_cache_alloc+0x2af/0x760 [ 30.734354] ? find_held_lock+0x36/0x1c0 [ 30.738421] get_empty_filp+0x125/0x520 [ 30.742384] ? proc_nr_files+0x60/0x60 [ 30.746278] ? kasan_check_read+0x11/0x20 [ 30.750411] ? do_raw_spin_unlock+0x9e/0x2e0 [ 30.754804] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 30.759406] ? kasan_check_write+0x14/0x20 [ 30.763627] ? do_raw_spin_lock+0xc1/0x200 [ 30.767852] alloc_file+0x24/0x3e0 [ 30.771376] ? clear_nlink.part.9+0x65/0x80 [ 30.775693] __shmem_file_setup+0x304/0x6e0 [ 30.780007] ? shmem_fill_super+0xa30/0xa30 [ 30.784328] ? get_unused_fd_flags+0x121/0x190 [ 30.788897] ? __alloc_fd+0x700/0x700 [ 30.792692] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 30.798215] ? _copy_from_user+0xdf/0x150 [ 30.802354] __x64_sys_memfd_create+0x2a7/0x5a0 [ 30.807019] ? memfd_fcntl+0x15d0/0x15d0 [ 30.811081] ? do_syscall_64+0x92/0x800 [ 30.815049] do_syscall_64+0x1b1/0x800 [ 30.818923] ? finish_task_switch+0x1ca/0x840 [ 30.823408] ? syscall_return_slowpath+0x5c0/0x5c0 [ 30.828325] ? syscall_return_slowpath+0x30f/0x5c0 [ 30.833246] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 30.838599] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.843435] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 30.848612] RIP: 0033:0x445f49 [ 30.851787] RSP: 002b:00007fc68d460d38 EFLAGS: 00000246 ORIG_RAX: 000000000000013f [ 30.859485] RAX: ffffffffffffffda RBX: 00000000006dcc24 RCX: 0000000000445f49 [ 30.866751] RDX: 0000000000445f49 RSI: 0000000000000000 RDI: 00000000004af10b [ 30.874009] RBP: 00007fc68d460d50 R08: 0000000800000000 R09: 0000000800000000 [ 30.881279] R10: 0000000800000000 R11: 0000000000000246 R12: 00000000006dcc20 executing program [ 30.888533] R13: 0000000000000000 R14: 0000000000000007 R15: 0030656c69662f2e [ 30.900748] FAULT_INJECTION: forcing a failure. [ 30.900748] name failslab, interval 1, probability 0, space 0, times 0 [ 30.912166] CPU: 0 PID: 4498 Comm: syz-executor500 Not tainted 4.17.0-rc5+ #54 [ 30.919517] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.928852] Call Trace: [ 30.931429] dump_stack+0x1b9/0x294 [ 30.935048] ? dump_stack_print_info.cold.2+0x52/0x52 [ 30.940235] should_fail.cold.4+0xa/0x1a [ 30.944283] ? perf_trace_run_bpf_submit+0x23f/0x370 [ 30.949375] ? fault_create_debugfs_attr+0x1f0/0x1f0 [ 30.954468] ? perf_tp_event+0xc30/0xc30 [ 30.958881] ? graph_lock+0x170/0x170 [ 30.962686] ? find_held_lock+0x36/0x1c0 [ 30.966757] ? check_same_owner+0x320/0x320 [ 30.971062] ? graph_lock+0x170/0x170 [ 30.974851] ? rcu_note_context_switch+0x710/0x710 [ 30.979767] ? kasan_check_read+0x11/0x20 [ 30.983900] ? do_raw_spin_unlock+0x9e/0x2e0 [ 30.988295] __should_failslab+0x124/0x180 [ 30.992519] should_failslab+0x9/0x14 [ 30.996306] kmem_cache_alloc+0x2af/0x760 [ 31.000438] ? find_held_lock+0x36/0x1c0 [ 31.004495] get_empty_filp+0x125/0x520 [ 31.008454] ? proc_nr_files+0x60/0x60 [ 31.012336] ? kasan_check_read+0x11/0x20 [ 31.016470] ? do_raw_spin_unlock+0x9e/0x2e0 [ 31.020864] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 31.025437] ? kasan_check_write+0x14/0x20 [ 31.029662] ? do_raw_spin_lock+0xc1/0x200 [ 31.033887] alloc_file+0x24/0x3e0 [ 31.037412] ? clear_nlink.part.9+0x65/0x80 [ 31.041723] __shmem_file_setup+0x304/0x6e0 [ 31.046043] ? shmem_fill_super+0xa30/0xa30 [ 31.050353] ? get_unused_fd_flags+0x121/0x190 [ 31.054922] ? __alloc_fd+0x700/0x700 [ 31.058718] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 31.064241] ? _copy_from_user+0xdf/0x150 [ 31.068379] __x64_sys_memfd_create+0x2a7/0x5a0 [ 31.073042] ? memfd_fcntl+0x15d0/0x15d0 [ 31.077093] ? do_syscall_64+0x92/0x800 [ 31.081062] do_syscall_64+0x1b1/0x800 [ 31.084936] ? finish_task_switch+0x1ca/0x840 [ 31.089421] ? syscall_return_slowpath+0x5c0/0x5c0 [ 31.094337] ? syscall_return_slowpath+0x30f/0x5c0 [ 31.099259] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 31.104613] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.109450] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 31.114624] RIP: 0033:0x445f49 [ 31.117798] RSP: 002b:00007fc68d460d38 EFLAGS: 00000246 ORIG_RAX: 000000000000013f [ 31.125495] RAX: ffffffffffffffda RBX: 00000000006dcc24 RCX: 0000000000445f49 [ 31.132748] RDX: 0000000000445f49 RSI: 0000000000000000 RDI: 00000000004af10b executing program [ 31.140007] RBP: 00007fc68d460d50 R08: 0000000800000000 R09: 0000000800000000 [ 31.147269] R10: 0000000800000000 R11: 0000000000000246 R12: 00000000006dcc20 [ 31.154524] R13: 0000000000000000 R14: 000000000000000a R15: 0030656c69662f2e [ 31.166099] FAULT_INJECTION: forcing a failure. [ 31.166099] name failslab, interval 1, probability 0, space 0, times 0 [ 31.177470] CPU: 0 PID: 4498 Comm: syz-executor500 Not tainted 4.17.0-rc5+ #54 [ 31.184816] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.194162] Call Trace: [ 31.196738] dump_stack+0x1b9/0x294 [ 31.200355] ? dump_stack_print_info.cold.2+0x52/0x52 [ 31.205542] should_fail.cold.4+0xa/0x1a [ 31.209589] ? perf_trace_run_bpf_submit+0x23f/0x370 [ 31.214680] ? fault_create_debugfs_attr+0x1f0/0x1f0 [ 31.219772] ? perf_tp_event+0xc30/0xc30 [ 31.223819] ? print_usage_bug+0xc0/0xc0 [ 31.227865] ? graph_lock+0x170/0x170 [ 31.231667] ? find_held_lock+0x36/0x1c0 [ 31.235740] ? check_same_owner+0x320/0x320 [ 31.240050] ? graph_lock+0x170/0x170 [ 31.243840] ? rcu_note_context_switch+0x710/0x710 [ 31.248755] ? kasan_check_read+0x11/0x20 [ 31.252896] ? do_raw_spin_unlock+0x9e/0x2e0 [ 31.257293] __should_failslab+0x124/0x180 [ 31.261522] should_failslab+0x9/0x14 [ 31.265308] kmem_cache_alloc+0x2af/0x760 [ 31.269439] ? find_held_lock+0x36/0x1c0 [ 31.273494] get_empty_filp+0x125/0x520 [ 31.277456] ? proc_nr_files+0x60/0x60 [ 31.281338] ? kasan_check_read+0x11/0x20 [ 31.285473] ? do_raw_spin_unlock+0x9e/0x2e0 [ 31.289867] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 31.294437] ? kasan_check_write+0x14/0x20 [ 31.298659] ? do_raw_spin_lock+0xc1/0x200 [ 31.302884] alloc_file+0x24/0x3e0 [ 31.306409] ? clear_nlink.part.9+0x65/0x80 [ 31.310723] __shmem_file_setup+0x304/0x6e0 [ 31.315043] ? shmem_fill_super+0xa30/0xa30 [ 31.319353] ? get_unused_fd_flags+0x121/0x190 [ 31.323922] ? __alloc_fd+0x700/0x700 [ 31.327716] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 31.333237] ? _copy_from_user+0xdf/0x150 [ 31.337374] __x64_sys_memfd_create+0x2a7/0x5a0 [ 31.342039] ? memfd_fcntl+0x15d0/0x15d0 [ 31.346090] ? do_syscall_64+0x92/0x800 [ 31.350062] do_syscall_64+0x1b1/0x800 [ 31.353933] ? finish_task_switch+0x1ca/0x840 [ 31.358418] ? syscall_return_slowpath+0x5c0/0x5c0 [ 31.363333] ? syscall_return_slowpath+0x30f/0x5c0 [ 31.368254] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 31.373608] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.378450] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 31.383622] RIP: 0033:0x445f49 [ 31.386801] RSP: 002b:00007fc68d460d38 EFLAGS: 00000246 ORIG_RAX: 000000000000013f [ 31.394497] RAX: ffffffffffffffda RBX: 00000000006dcc24 RCX: 0000000000445f49 [ 31.401749] RDX: 0000000000445f49 RSI: 0000000000000000 RDI: 00000000004af10b [ 31.409003] RBP: 00007fc68d460d50 R08: 0000000800000000 R09: 0000000800000000 [ 31.416269] R10: 0000000800000000 R11: 0000000000000246 R12: 00000000006dcc20 [ 31.423522] R13: 0000000000000000 R14: 000000000000000d R15: 0030656c69662f2e [ 31.432424] FAULT_INJECTION: forcing a failure. [ 31.432424] name failslab, interval 1, probability 0, space 0, times 0 [ 31.443753] CPU: 0 PID: 4501 Comm: syz-executor500 Not tainted 4.17.0-rc5+ #54 [ 31.451106] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.460436] Call Trace: [ 31.463006] dump_stack+0x1b9/0x294 [ 31.466630] ? dump_stack_print_info.cold.2+0x52/0x52 [ 31.471807] should_fail.cold.4+0xa/0x1a [ 31.475852] ? fault_create_debugfs_attr+0x1f0/0x1f0 [ 31.480934] ? graph_lock+0x170/0x170 [ 31.484716] ? lock_downgrade+0x8e0/0x8e0 [ 31.488850] ? find_held_lock+0x36/0x1c0 [ 31.492896] ? lock_downgrade+0x8e0/0x8e0 [ 31.497030] ? rcu_is_watching+0x85/0x140 [ 31.501156] ? rcu_bh_force_quiescent_state+0x20/0x20 [ 31.506328] __should_failslab+0x124/0x180 [ 31.510543] should_failslab+0x9/0x14 [ 31.514323] kmem_cache_alloc_trace+0x4b/0x780 [ 31.518885] ? delayed_put_pid+0x30/0x30 [ 31.522929] ? new_inode+0x40/0x40 [ 31.526447] ? security_inode_permission+0xd2/0x100 [ 31.531445] proc_thread_self_get_link+0x18c/0x1e0 [ 31.536353] ? proc_setup_self.cold.2+0x25/0x25 [ 31.541004] link_path_walk+0xfff/0x1520 [ 31.545045] ? pick_link+0xb00/0xb00 [ 31.548744] ? walk_component+0x2550/0x2550 [ 31.553044] ? get_empty_filp+0x37a/0x520 [ 31.557170] ? proc_nr_files+0x60/0x60 [ 31.561040] ? lock_downgrade+0x8e0/0x8e0 [ 31.565170] ? perf_trace_lock+0xd6/0x900 [ 31.569297] ? rcu_is_watching+0x85/0x140 [ 31.573426] path_openat+0x246/0x4e20 [ 31.577214] ? unwind_get_return_address+0x61/0xa0 [ 31.582126] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 31.587123] ? path_lookupat.isra.44+0xbd0/0xbd0 [ 31.591859] ? find_held_lock+0x36/0x1c0 [ 31.595906] ? lock_downgrade+0x8e0/0x8e0 [ 31.600034] ? do_sys_open+0x39a/0x740 [ 31.603906] ? kasan_check_read+0x11/0x20 [ 31.608036] ? do_raw_spin_unlock+0x9e/0x2e0 [ 31.612423] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 31.616985] ? __lock_is_held+0xb5/0x140 [ 31.621033] ? _raw_spin_unlock+0x22/0x30 [ 31.625161] ? __alloc_fd+0x346/0x700 [ 31.628938] ? usercopy_warn+0x120/0x120 [ 31.632987] do_filp_open+0x249/0x350 [ 31.636773] ? may_open_dev+0x100/0x100 [ 31.640733] ? strncpy_from_user+0x3b6/0x500 [ 31.645130] ? get_unused_fd_flags+0x121/0x190 [ 31.649691] ? getname_flags+0xd0/0x5a0 [ 31.653650] ? getname_flags+0x26e/0x5a0 [ 31.657694] do_sys_open+0x56f/0x740 [ 31.661390] ? filp_open+0x80/0x80 [ 31.664916] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 31.669743] __x64_sys_open+0x7e/0xc0 [ 31.673523] do_syscall_64+0x1b1/0x800 [ 31.677390] ? finish_task_switch+0x1ca/0x840 [ 31.681867] ? syscall_return_slowpath+0x5c0/0x5c0 [ 31.686776] ? syscall_return_slowpath+0x30f/0x5c0 [ 31.691687] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 31.697031] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.701856] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 31.707030] RIP: 0033:0x4059f1 [ 31.710207] RSP: 002b:00007fc68d43fd30 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 [ 31.717897] RAX: ffffffffffffffda RBX: 00000000006dcc3c RCX: 00000000004059f1 [ 31.725144] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00000000004af131 [ 31.732392] RBP: 00007fc68d43fd50 R08: 0000000000000000 R09: 0000000000000001 executing program executing program [ 31.739649] R10: 0000000000000000 R11: 0000000000000293 R12: 00000000006dcc38 [ 31.746897] R13: 0000000000000000 R14: 0000000000000004 R15: 0030656c69662f2e [ 31.767641] FAT-fs (loop0): bogus number of reserved sectors [ 31.773568] FAT-fs (loop0): Can't find a valid FAT filesystem [ 31.790158] FAULT_INJECTION: forcing a failure. [ 31.790158] name failslab, interval 1, probability 0, space 0, times 0 [ 31.801532] CPU: 0 PID: 4498 Comm: syz-executor500 Not tainted 4.17.0-rc5+ #54 [ 31.808878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.818217] Call Trace: [ 31.820797] dump_stack+0x1b9/0x294 [ 31.824418] ? dump_stack_print_info.cold.2+0x52/0x52 [ 31.829615] should_fail.cold.4+0xa/0x1a [ 31.833671] ? fault_create_debugfs_attr+0x1f0/0x1f0 [ 31.838769] ? perf_trace_run_bpf_submit+0x23f/0x370 [ 31.843860] ? perf_trace_run_bpf_submit+0x246/0x370 [ 31.848956] ? graph_lock+0x170/0x170 [ 31.852748] ? perf_tp_event+0xc30/0xc30 [ 31.856807] ? find_held_lock+0x36/0x1c0 [ 31.860865] ? __lock_is_held+0xb5/0x140 [ 31.864935] ? check_same_owner+0x320/0x320 [ 31.869249] ? rcu_note_context_switch+0x710/0x710 [ 31.874172] __should_failslab+0x124/0x180 [ 31.878399] should_failslab+0x9/0x14 [ 31.882206] kmem_cache_alloc+0x2af/0x760 [ 31.886343] ? graph_lock+0x170/0x170 [ 31.890143] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 31.895155] __kernfs_new_node+0xe7/0x580 [ 31.899297] ? kernfs_dop_revalidate+0x3c0/0x3c0 [ 31.904053] ? lock_downgrade+0x8e0/0x8e0 [ 31.908194] ? lock_release+0xa10/0xa10 [ 31.912166] ? rcu_note_context_switch+0x710/0x710 [ 31.917092] kernfs_new_node+0x80/0xf0 [ 31.920972] kernfs_create_dir_ns+0x3d/0x140 [ 31.925374] internal_create_group+0x110/0x970 [ 31.929945] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.934961] sysfs_create_group+0x1f/0x30 [ 31.939102] lo_ioctl+0x1771/0x2130 [ 31.942727] ? lo_rw_aio_complete+0x430/0x430 [ 31.947213] blkdev_ioctl+0x9b6/0x2020 [ 31.951093] ? blkpg_ioctl+0xc40/0xc40 [ 31.954972] ? lock_downgrade+0x8e0/0x8e0 [ 31.959122] ? rcu_is_watching+0x85/0x140 [ 31.963263] ? rcu_bh_force_quiescent_state+0x20/0x20 [ 31.968457] ? __fget+0x40c/0x650 [ 31.971909] ? expand_files.part.8+0x9a0/0x9a0 [ 31.976488] ? trace_hardirqs_off+0xd/0x10 [ 31.980713] ? _raw_spin_unlock_irqrestore+0x63/0xc0 [ 31.985813] block_ioctl+0xee/0x130 [ 31.989431] ? blkdev_fallocate+0x400/0x400 [ 31.993752] do_vfs_ioctl+0x1cf/0x16a0 [ 31.997629] ? rcu_pm_notify+0xc0/0xc0 [ 32.001510] ? ioctl_preallocate+0x2e0/0x2e0 [ 32.005908] ? fget_raw+0x20/0x20 [ 32.009347] ? putname+0xf2/0x130 [ 32.012788] ? rcu_read_lock_sched_held+0x108/0x120 [ 32.017792] ? kmem_cache_free+0x25c/0x2d0 [ 32.022030] ? putname+0xf7/0x130 [ 32.025490] ? do_sys_open+0x3c3/0x740 [ 32.029374] ? security_file_ioctl+0x94/0xc0 [ 32.033775] ksys_ioctl+0xa9/0xd0 [ 32.037223] __x64_sys_ioctl+0x73/0xb0 [ 32.041111] do_syscall_64+0x1b1/0x800 [ 32.044988] ? finish_task_switch+0x1ca/0x840 [ 32.049477] ? syscall_return_slowpath+0x5c0/0x5c0 [ 32.054396] ? syscall_return_slowpath+0x30f/0x5c0 [ 32.059324] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 32.064681] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.069524] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 32.074700] RIP: 0033:0x445e37 [ 32.077879] RSP: 002b:00007fc68d460d38 EFLAGS: 00000217 ORIG_RAX: 0000000000000010 [ 32.085580] RAX: ffffffffffffffda RBX: 00000000006dcc24 RCX: 0000000000445e37 [ 32.092836] RDX: 0000000000000016 RSI: 0000000000004c00 RDI: 0000000000000017 [ 32.100093] RBP: 00007fc68d460d50 R08: 0000000000000000 R09: 000000000000000a [ 32.107348] R10: 0000000000000075 R11: 0000000000000217 R12: 00000000006dcc20 [ 32.114615] R13: 0000000000000016 R14: 0000000000000013 R15: 0030656c69662f2e [ 32.123556] FAULT_INJECTION: forcing a failure. [ 32.123556] name failslab, interval 1, probability 0, space 0, times 0 [ 32.134817] CPU: 0 PID: 4501 Comm: syz-executor500 Not tainted 4.17.0-rc5+ #54 [ 32.142178] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.151527] Call Trace: [ 32.154122] dump_stack+0x1b9/0x294 [ 32.156110] FAT-fs (loop0): bogus number of reserved sectors [ 32.157755] ? dump_stack_print_info.cold.2+0x52/0x52 [ 32.157783] should_fail.cold.4+0xa/0x1a [ 32.157802] ? __lock_acquire+0x7f5/0x5140 [ 32.163652] FAT-fs (loop0): Can't find a valid FAT filesystem [ 32.168764] ? fault_create_debugfs_attr+0x1f0/0x1f0 [ 32.168784] ? debug_check_no_locks_freed+0x310/0x310 [ 32.168802] ? print_usage_bug+0xc0/0xc0 [ 32.168820] ? find_held_lock+0x36/0x1c0 [ 32.168855] ? check_same_owner+0x320/0x320 [ 32.205535] ? rcu_note_context_switch+0x710/0x710 [ 32.210457] __should_failslab+0x124/0x180 [ 32.214675] should_failslab+0x9/0x14 [ 32.218457] kmem_cache_alloc+0x2af/0x760 [ 32.222594] ? debug_check_no_locks_freed+0x310/0x310 [ 32.227767] get_empty_filp+0x125/0x520 [ 32.231722] ? proc_nr_files+0x60/0x60 [ 32.235592] ? lock_downgrade+0x8e0/0x8e0 [ 32.239721] ? perf_trace_lock+0xd6/0x900 [ 32.243850] ? rcu_is_watching+0x85/0x140 [ 32.247980] path_openat+0x116/0x4e20 [ 32.251770] ? unwind_get_return_address+0x61/0xa0 [ 32.256681] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 32.261676] ? path_lookupat.isra.44+0xbd0/0xbd0 [ 32.266414] ? find_held_lock+0x36/0x1c0 [ 32.270462] ? lock_downgrade+0x8e0/0x8e0 [ 32.274593] ? do_sys_open+0x39a/0x740 [ 32.278472] ? kasan_check_read+0x11/0x20 [ 32.282606] ? do_raw_spin_unlock+0x9e/0x2e0 [ 32.286994] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 32.291561] ? __lock_is_held+0xb5/0x140 [ 32.295614] ? _raw_spin_unlock+0x22/0x30 [ 32.299745] ? __alloc_fd+0x346/0x700 [ 32.303525] ? usercopy_warn+0x120/0x120 [ 32.307573] do_filp_open+0x249/0x350 [ 32.311354] ? may_open_dev+0x100/0x100 [ 32.315308] ? strncpy_from_user+0x3b6/0x500 [ 32.319699] ? mpi_free.cold.1+0x19/0x19 [ 32.323746] ? get_unused_fd_flags+0x121/0x190 [ 32.328307] ? getname_flags+0xd0/0x5a0 [ 32.332260] ? getname_flags+0x26e/0x5a0 [ 32.336308] do_sys_open+0x56f/0x740 [ 32.340006] ? filp_open+0x80/0x80 [ 32.343535] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 32.348361] __x64_sys_open+0x7e/0xc0 [ 32.352144] do_syscall_64+0x1b1/0x800 [ 32.356012] ? finish_task_switch+0x1ca/0x840 [ 32.360496] ? syscall_return_slowpath+0x5c0/0x5c0 [ 32.365406] ? syscall_return_slowpath+0x30f/0x5c0 [ 32.370318] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 32.375674] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.380499] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 32.385670] RIP: 0033:0x4059f1 [ 32.388837] RSP: 002b:00007fc68d43f830 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 [ 32.396522] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00000000004059f1 [ 32.403769] RDX: 00007fc68d43f861 RSI: 0000000000080001 RDI: 00000000004af208 [ 32.411023] RBP: 00000000004af208 R08: 0000000000000000 R09: 0000000000000001 [ 32.418277] R10: 0000000000000000 R11: 0000000000000293 R12: 00000000006dcc38 [ 32.425528] R13: 0000000000000000 R14: 0000000000000010 R15: 0030656c69662f2e [ 32.437745] ------------[ cut here ]------------ executing program [ 32.442566] sysfs group 'loop' not found for kobject 'loop0' [ 32.448634] WARNING: CPU: 0 PID: 4498 at fs/sysfs/group.c:235 sysfs_remove_group+0x15b/0x1b0 [ 32.449475] FAULT_INJECTION: forcing a failure. [ 32.449475] name fail_futex, interval 1, probability 0, space 0, times 1 [ 32.457212] Kernel panic - not syncing: panic_on_warn set ... [ 32.457212] [ 32.457237] CPU: 0 PID: 4498 Comm: syz-executor500 Not tainted 4.17.0-rc5+ #54 [ 32.457249] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.457258] Call Trace: [ 32.457281] dump_stack+0x1b9/0x294 [ 32.457308] ? dump_stack_print_info.cold.2+0x52/0x52 [ 32.504056] ? sysfs_remove_group+0xf0/0x1b0 [ 32.508473] panic+0x22f/0x4de [ 32.511670] ? add_taint.cold.5+0x16/0x16 [ 32.515836] ? __warn.cold.8+0x148/0x1b3 [ 32.519899] ? __warn.cold.8+0x117/0x1b3 [ 32.523971] ? sysfs_remove_group+0x15b/0x1b0 [ 32.528475] __warn.cold.8+0x163/0x1b3 [ 32.532371] ? sysfs_remove_group+0x15b/0x1b0 [ 32.536877] report_bug+0x252/0x2d0 [ 32.540523] do_error_trap+0x1de/0x490 [ 32.544430] ? math_error+0x420/0x420 [ 32.548238] ? vprintk_default+0x28/0x30 [ 32.552305] ? vprintk_func+0x81/0xe7 [ 32.556113] ? printk+0x9e/0xba [ 32.559415] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.564277] do_invalid_op+0x1b/0x20 [ 32.567997] invalid_op+0x14/0x20 [ 32.571460] RIP: 0010:sysfs_remove_group+0x15b/0x1b0 [ 32.576577] RSP: 0018:ffff8801ace67848 EFLAGS: 00010286 [ 32.581960] RAX: 0000000000000030 RBX: ffffffff892dc900 RCX: ffffffff8160aa5d [ 32.589245] RDX: 0000000000000000 RSI: ffffffff8160f711 RDI: ffff8801ace673a8 [ 32.596525] RBP: ffff8801ace67870 R08: ffff8801aebde3c0 R09: 0000000000000006 [ 32.603798] R10: ffff8801aebde3c0 R11: 0000000000000000 R12: 0000000000000000 [ 32.611070] R13: ffff8801d28202a0 R14: ffffffff88279e00 R15: ffff8801d2e6ec28 [ 32.618365] ? console_unlock+0x8ad/0x1100 [ 32.622606] ? vprintk_func+0x81/0xe7 [ 32.626421] ? sysfs_remove_group+0x15b/0x1b0 [ 32.630931] loop_clr_fd+0x51e/0xb80 [ 32.634663] ? loop_attr_do_show_backing_file+0x1a0/0x1a0 [ 32.640221] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 32.645425] lo_ioctl+0x642/0x2130 [ 32.648987] ? lo_rw_aio_complete+0x430/0x430 [ 32.653493] blkdev_ioctl+0x9b6/0x2020 [ 32.657390] ? blkpg_ioctl+0xc40/0xc40 [ 32.661286] ? lock_downgrade+0x8e0/0x8e0 [ 32.665457] ? rcu_is_watching+0x85/0x140 [ 32.669611] ? rcu_bh_force_quiescent_state+0x20/0x20 [ 32.674830] ? __fget+0x40c/0x650 [ 32.678301] ? kmem_cache_free_bulk+0x1b1/0x1d0 [ 32.682983] ? expand_files.part.8+0x9a0/0x9a0 [ 32.687584] ? kasan_check_read+0x11/0x20 [ 32.691749] block_ioctl+0xee/0x130 [ 32.695381] ? blkdev_fallocate+0x400/0x400 [ 32.699713] do_vfs_ioctl+0x1cf/0x16a0 [ 32.703623] ? ioctl_preallocate+0x2e0/0x2e0 [ 32.708046] ? fget_raw+0x20/0x20 [ 32.711521] ? trace_hardirqs_off+0xd/0x10 [ 32.715763] ? quarantine_put+0xeb/0x190 [ 32.719832] ? kfree+0x111/0x260 [ 32.723204] ? ksys_mount+0xa3/0x140 [ 32.726923] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 32.731949] ? security_file_ioctl+0x94/0xc0 [ 32.736372] ksys_ioctl+0xa9/0xd0 [ 32.739840] __x64_sys_ioctl+0x73/0xb0 [ 32.743737] do_syscall_64+0x1b1/0x800 [ 32.747629] ? finish_task_switch+0x1ca/0x840 [ 32.752136] ? syscall_return_slowpath+0x5c0/0x5c0 [ 32.757073] ? syscall_return_slowpath+0x30f/0x5c0 [ 32.762018] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 32.767401] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.772261] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 32.777450] RIP: 0033:0x445e37 [ 32.780644] RSP: 002b:00007fc68d460d38 EFLAGS: 00000203 ORIG_RAX: 0000000000000010 [ 32.788365] RAX: ffffffffffffffda RBX: 00000000006dcc24 RCX: 0000000000445e37 [ 32.795639] RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000017 [ 32.802914] RBP: 00007fc68d460d50 R08: 0000000020000240 R09: 000000000000000a [ 32.810184] R10: 0000000000000000 R11: 0000000000000203 R12: 00000000006dcc20 [ 32.817454] R13: 0000000000000016 R14: 0000000000000016 R15: 0030656c69662f2e [ 32.824769] CPU: 1 PID: 4501 Comm: syz-executor500 Not tainted 4.17.0-rc5+ #54 [ 32.832133] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.841479] Call Trace: [ 32.844062] dump_stack+0x1b9/0x294 [ 32.847686] ? dump_stack_print_info.cold.2+0x52/0x52 [ 32.852881] should_fail.cold.4+0xa/0x1a [ 32.856939] ? fault_create_debugfs_attr+0x1f0/0x1f0 [ 32.862056] ? find_held_lock+0x36/0x1c0 [ 32.866123] ? lock_downgrade+0x8e0/0x8e0 [ 32.870261] ? get_user_pages_fast+0x223/0x440 [ 32.874833] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 32.879847] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 32.884850] ? get_user_pages_fast+0x2a1/0x440 [ 32.889430] ? __get_user_pages_fast+0x3e0/0x3e0 [ 32.894185] ? update_curr+0x4d5/0xbe0 [ 32.898067] get_futex_key+0x181f/0x1e90 [ 32.902129] ? futex_lock_pi_atomic+0x390/0x390 [ 32.907138] ? account_entity_enqueue+0x3db/0x6f0 [ 32.911985] ? perf_trace_run_bpf_submit+0x23f/0x370 [ 32.917083] ? perf_trace_run_bpf_submit+0x23f/0x370 [ 32.922174] ? perf_trace_run_bpf_submit+0x246/0x370 [ 32.927267] ? perf_trace_run_bpf_submit+0x246/0x370 [ 32.932373] ? perf_tp_event+0xc30/0xc30 [ 32.936425] ? perf_tp_event+0xc30/0xc30 [ 32.940479] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 32.946006] ? __account_cfs_rq_runtime+0x600/0x600 [ 32.951028] ? perf_trace_lock+0x495/0x900 [ 32.955255] ? perf_trace_run_bpf_submit+0x246/0x370 [ 32.960365] ? zap_class+0x720/0x720 [ 32.964067] ? zap_class+0x720/0x720 [ 32.967773] ? plist_check_prev_next+0x115/0x1b0 [ 32.972524] ? graph_lock+0x170/0x170 [ 32.976318] ? graph_lock+0x170/0x170 [ 32.980115] ? dequeue_task_fair+0x9c0/0x9c0 [ 32.984524] ? find_held_lock+0x36/0x1c0 [ 32.988590] ? lock_downgrade+0x8e0/0x8e0 [ 32.992724] ? lock_downgrade+0x8e0/0x8e0 [ 32.996868] ? kasan_check_read+0x11/0x20 [ 33.001007] ? do_raw_spin_unlock+0x9e/0x2e0 [ 33.005406] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 33.009979] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 33.015076] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 33.020080] ? trace_hardirqs_on+0xd/0x10 [ 33.024220] ? try_to_wake_up+0x102/0x1190 [ 33.028442] ? lock_downgrade+0x8e0/0x8e0 [ 33.032590] futex_wait_setup+0xd1/0x400 [ 33.036651] ? futex_wake+0x750/0x750 [ 33.040452] futex_wait+0x40d/0x9f0 [ 33.044079] ? futex_wait_setup+0x400/0x400 [ 33.048397] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 33.053579] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 33.059112] ? drop_futex_key_refs.isra.13+0x6d/0xe0 [ 33.064204] ? futex_wake+0x2f6/0x750 [ 33.068008] ? get_futex_key+0x1e90/0x1e90 [ 33.072259] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 33.077441] do_futex+0x336/0x27d0 [ 33.080970] ? lock_downgrade+0x8e0/0x8e0 [ 33.085117] ? rcu_is_watching+0x85/0x140 [ 33.089258] ? exit_robust_list+0x290/0x290 [ 33.093585] ? __fd_install+0x2de/0x880 [ 33.097552] ? __mutex_unlock_slowpath+0x180/0x8a0 [ 33.102474] ? get_unused_fd_flags+0x190/0x190 [ 33.107045] ? wait_for_completion+0x870/0x870 [ 33.111616] ? lock_downgrade+0x8e0/0x8e0 [ 33.115764] ? mark_held_locks+0xc9/0x160 [ 33.119902] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 33.124473] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 33.129577] ? fd_install+0x4d/0x60 [ 33.133195] ? __do_sys_perf_event_open+0x7b4/0x2fa0 [ 33.138286] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.143656] ? perf_event_set_output+0x660/0x660 [ 33.148400] ? do_raw_spin_lock+0xc1/0x200 [ 33.152625] ? trace_hardirqs_off+0xd/0x10 [ 33.156847] ? _raw_spin_unlock_irqrestore+0x63/0xc0 [ 33.161942] ? debug_check_no_obj_freed+0x2ff/0x584 [ 33.166962] __x64_sys_futex+0x46a/0x680 [ 33.171022] ? do_futex+0x27d0/0x27d0 [ 33.174822] ? ksys_mount+0xa8/0x140 [ 33.178528] ? do_syscall_64+0x92/0x800 [ 33.182500] do_syscall_64+0x1b1/0x800 [ 33.186379] ? finish_task_switch+0x1ca/0x840 [ 33.190865] ? syscall_return_slowpath+0x5c0/0x5c0 [ 33.195957] ? syscall_return_slowpath+0x30f/0x5c0 [ 33.200884] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 33.206244] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.211086] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.216262] RIP: 0033:0x445f49 [ 33.219439] RSP: 002b:00007fc68d43fd38 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 33.227138] RAX: ffffffffffffffda RBX: 00000000006dcc3c RCX: 0000000000445f49 [ 33.234398] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000006dcc3c [ 33.241653] RBP: 00007fc68d43fd50 R08: 0000000000000000 R09: 0000000000000000 [ 33.248912] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc38 [ 33.256167] R13: 0000000000000000 R14: 0000000000000018 R15: 0030656c69662f2e [ 33.263950] Dumping ftrace buffer: [ 33.267653] (ftrace buffer empty) [ 33.271351] Kernel Offset: disabled [ 33.274981] Rebooting in 86400 seconds..