[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.25' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 34.301337] FAULT_INJECTION: forcing a failure. [ 34.301337] name failslab, interval 1, probability 0, space 0, times 1 [ 34.312652] CPU: 0 PID: 8097 Comm: syz-executor840 Not tainted 4.19.211-syzkaller #0 [ 34.320520] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.329852] Call Trace: [ 34.332445] dump_stack+0x1fc/0x2ef [ 34.336059] should_fail.cold+0xa/0xf [ 34.339841] ? setup_fault_attr+0x200/0x200 [ 34.344145] ? lock_acquire+0x170/0x3c0 [ 34.348105] __should_failslab+0x115/0x180 [ 34.352324] should_failslab+0x5/0x10 [ 34.356111] kmem_cache_alloc+0x277/0x370 [ 34.360251] __kernfs_new_node+0xd2/0x680 [ 34.364385] ? kernfs_dop_revalidate+0x3a0/0x3a0 [ 34.369134] ? __mutex_unlock_slowpath+0xea/0x610 [ 34.373970] ? wait_for_completion_io+0x10/0x10 [ 34.378640] ? kernfs_next_descendant_post+0x19c/0x290 [ 34.383902] kernfs_new_node+0x92/0x120 [ 34.387861] __kernfs_create_file+0x51/0x340 [ 34.392301] sysfs_add_file_mode_ns+0x226/0x540 [ 34.396963] sysfs_merge_group+0x198/0x320 [ 34.401192] ? sysfs_update_group+0x30/0x30 [ 34.405496] ? kernfs_create_link+0x1b9/0x230 [ 34.409990] ? kernfs_put+0x31/0x50 [ 34.413601] dpm_sysfs_add+0x154/0x210 [ 34.417469] device_add+0xa43/0x16d0 [ 34.421165] ? device_check_offline+0x280/0x280 [ 34.425814] ? kfree_const+0x51/0x60 [ 34.429524] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 34.434519] ? kfree+0x1e2/0x210 [ 34.437886] device_create_groups_vargs+0x1f4/0x270 [ 34.442889] device_create+0xdf/0x120 [ 34.446682] ? device_create_vargs+0x50/0x50 [ 34.451085] ? pointer+0x850/0x850 [ 34.454624] bdi_register_va.part.0+0x4c/0x750 [ 34.459204] bdi_register+0x12a/0x140 [ 34.463000] ? bdi_register_va+0x80/0x80 [ 34.467048] ? vsnprintf+0x2cc/0x14f0 [ 34.470843] bdi_register_owner+0x59/0x100 [ 34.475069] __device_add_disk+0xd58/0x10c0 [ 34.479398] ? sprintf+0xc0/0x100 [ 34.482853] ? blk_alloc_devt+0x2d0/0x2d0 [ 34.487001] ? __raw_spin_lock_init+0x28/0x100 [ 34.491566] ? __lockdep_init_map+0x100/0x5a0 [ 34.496046] loop_add+0x628/0x8a0 [ 34.499595] loop_control_ioctl+0x16c/0x480 [ 34.503898] ? loop_lookup+0x1d0/0x1d0 [ 34.507773] ? __vfs_write+0xff/0x770 [ 34.511558] ? proc_tgid_io_accounting+0x7f0/0x7f0 [ 34.516470] ? common_file_perm+0x4e5/0x850 [ 34.520778] ? loop_lookup+0x1d0/0x1d0 [ 34.524655] do_vfs_ioctl+0xcdb/0x12e0 [ 34.528531] ? vfs_write+0x3d7/0x540 [ 34.532228] ? ioctl_preallocate+0x200/0x200 [ 34.536619] ? lock_downgrade+0x720/0x720 [ 34.540749] ? check_preemption_disabled+0x41/0x280 [ 34.545750] ? vfs_write+0x393/0x540 [ 34.549445] ? ksys_write+0x1c8/0x2a0 [ 34.553226] ksys_ioctl+0x9b/0xc0 [ 34.556659] __x64_sys_ioctl+0x6f/0xb0 [ 34.560526] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 34.565092] do_syscall_64+0xf9/0x620 [ 34.568898] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.574069] RIP: 0033:0x7fbb97d92079 [ 34.577763] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 34.596643] RSP: 002b:00007ffe2295d568 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 34.604331] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fbb97d92079 [ 34.611584] RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000003 [ 34.618838] RBP: 00007ffe2295d580 R08: 0000000000000002 R09: 0000000000000001 [ 34.626093] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 34.633349] R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 [ 34.645854] ------------[ cut here ]------------ [ 34.650964] WARNING: CPU: 0 PID: 8097 at block/genhd.c:719 __device_add_disk.cold+0x69/0x188 [ 34.659537] Kernel panic - not syncing: panic_on_warn set ... [ 34.659537] [ 34.666902] CPU: 0 PID: 8097 Comm: syz-executor840 Not tainted 4.19.211-syzkaller #0 [ 34.674776] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.684120] Call Trace: [ 34.686696] dump_stack+0x1fc/0x2ef [ 34.690318] panic+0x26a/0x50e [ 34.693521] ? __warn_printk+0xf3/0xf3 [ 34.697408] ? __device_add_disk.cold+0x69/0x188 [ 34.702147] ? __probe_kernel_read+0x130/0x1b0 [ 34.706708] ? __warn.cold+0x5/0x5a [ 34.710317] ? __warn+0xe4/0x200 [ 34.713766] ? __device_add_disk.cold+0x69/0x188 [ 34.718508] __warn.cold+0x20/0x5a [ 34.722034] ? __device_add_disk.cold+0x69/0x188 [ 34.726772] report_bug+0x262/0x2b0 [ 34.730387] do_error_trap+0x1d7/0x310 [ 34.734266] ? math_error+0x310/0x310 [ 34.738058] ? __irq_work_queue_local+0x101/0x160 [ 34.742884] ? irq_work_queue+0x29/0x80 [ 34.746879] ? error_entry+0x72/0xd0 [ 34.750584] ? trace_hardirqs_off_caller+0x6e/0x210 [ 34.755587] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.760418] invalid_op+0x14/0x20 [ 34.763870] RIP: 0010:__device_add_disk.cold+0x69/0x188 [ 34.769219] Code: 02 84 c0 74 08 3c 03 0f 8e a8 00 00 00 44 8b a5 f0 05 00 00 e9 67 ad 6a fb e8 05 45 66 f9 48 c7 c7 60 75 b2 88 e8 64 76 f7 ff <0f> 0b e9 8f b9 6a fb e8 ed 44 66 f9 48 c7 c7 60 75 b2 88 e8 4c 76 [ 34.788105] RSP: 0018:ffff888094ccfb38 EFLAGS: 00010286 [ 34.793454] RAX: 0000000000000024 RBX: 0000000000000001 RCX: 0000000000000000 [ 34.800703] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed1012999f59 [ 34.808070] RBP: ffff8880b133a100 R08: 0000000000000024 R09: 0000000000000000 [ 34.815320] R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880b133a190 [ 34.822574] R13: ffff8880b133a790 R14: 00000000fffffff4 R15: ffff8880b133a104 [ 34.829838] ? vprintk_func+0x81/0x180 [ 34.833713] ? __device_add_disk.cold+0x69/0x188 [ 34.838452] ? sprintf+0xc0/0x100 [ 34.841887] ? blk_alloc_devt+0x2d0/0x2d0 [ 34.846017] ? __raw_spin_lock_init+0x28/0x100 [ 34.850580] ? __lockdep_init_map+0x100/0x5a0 [ 34.855059] loop_add+0x628/0x8a0 [ 34.858496] loop_control_ioctl+0x16c/0x480 [ 34.862797] ? loop_lookup+0x1d0/0x1d0 [ 34.866676] ? __vfs_write+0xff/0x770 [ 34.870458] ? proc_tgid_io_accounting+0x7f0/0x7f0 [ 34.875371] ? common_file_perm+0x4e5/0x850 [ 34.879680] ? loop_lookup+0x1d0/0x1d0 [ 34.883546] do_vfs_ioctl+0xcdb/0x12e0 [ 34.887418] ? vfs_write+0x3d7/0x540 [ 34.891130] ? ioctl_preallocate+0x200/0x200 [ 34.895536] ? lock_downgrade+0x720/0x720 [ 34.899669] ? check_preemption_disabled+0x41/0x280 [ 34.904667] ? vfs_write+0x393/0x540 [ 34.908363] ? ksys_write+0x1c8/0x2a0 [ 34.912146] ksys_ioctl+0x9b/0xc0 [ 34.915579] __x64_sys_ioctl+0x6f/0xb0 [ 34.919447] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 34.924007] do_syscall_64+0xf9/0x620 [ 34.927792] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.932967] RIP: 0033:0x7fbb97d92079 [ 34.936668] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 34.955553] RSP: 002b:00007ffe2295d568 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 34.963245] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fbb97d92079 [ 34.970519] RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000003 [ 34.977790] RBP: 00007ffe2295d580 R08: 0000000000000002 R09: 0000000000000001 [ 34.985058] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 34.992316] R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 [ 34.999940] Kernel Offset: disabled [ 35.003622] Rebooting in 86400 seconds..