[ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.219' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 33.471144] FAULT_INJECTION: forcing a failure. [ 33.471144] name failslab, interval 1, probability 0, space 0, times 1 [ 33.482896] CPU: 1 PID: 8116 Comm: syz-executor175 Not tainted 4.19.211-syzkaller #0 [ 33.490763] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.500099] Call Trace: [ 33.502676] dump_stack+0x1fc/0x2ef [ 33.506287] should_fail.cold+0xa/0xf [ 33.510077] ? setup_fault_attr+0x200/0x200 [ 33.514385] ? lock_acquire+0x170/0x3c0 [ 33.518355] ? dev_uevent_filter+0xd0/0xd0 [ 33.522576] __should_failslab+0x115/0x180 [ 33.526795] should_failslab+0x5/0x10 [ 33.530581] kmem_cache_alloc_trace+0x284/0x380 [ 33.535234] ? dev_uevent_filter+0xd0/0xd0 [ 33.539458] kobject_uevent_env+0x236/0x1480 [ 33.543880] ? wait_for_completion_io+0x10/0x10 [ 33.548535] device_add+0xb2f/0x16d0 [ 33.552248] ? device_check_offline+0x280/0x280 [ 33.556904] ? kfree_const+0x51/0x60 [ 33.560600] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 33.565602] ? kfree+0x1e2/0x210 [ 33.568951] device_create_groups_vargs+0x1f4/0x270 [ 33.573958] device_create+0xdf/0x120 [ 33.577743] ? device_create_vargs+0x50/0x50 [ 33.582135] ? pointer+0x850/0x850 [ 33.585760] bdi_register_va.part.0+0x4c/0x750 [ 33.590331] bdi_register+0x12a/0x140 [ 33.594118] ? bdi_register_va+0x80/0x80 [ 33.598169] ? vsnprintf+0x2cc/0x14f0 [ 33.601973] bdi_register_owner+0x59/0x100 [ 33.606205] __device_add_disk+0xd58/0x10c0 [ 33.610512] ? sprintf+0xc0/0x100 [ 33.613949] ? blk_alloc_devt+0x2d0/0x2d0 [ 33.618099] ? __raw_spin_lock_init+0x28/0x100 [ 33.622908] ? __lockdep_init_map+0x100/0x5a0 [ 33.627405] loop_add+0x628/0x8a0 [ 33.630845] loop_control_ioctl+0x16c/0x480 [ 33.635153] ? loop_lookup+0x1d0/0x1d0 [ 33.639030] ? __vfs_write+0xff/0x770 [ 33.642923] ? proc_tgid_io_accounting+0x7f0/0x7f0 [ 33.647839] ? common_file_perm+0x4e5/0x850 [ 33.652155] ? loop_lookup+0x1d0/0x1d0 [ 33.656206] do_vfs_ioctl+0xcdb/0x12e0 [ 33.660087] ? vfs_write+0x3d7/0x540 [ 33.663783] ? ioctl_preallocate+0x200/0x200 [ 33.668174] ? lock_downgrade+0x720/0x720 [ 33.672309] ? check_preemption_disabled+0x41/0x280 [ 33.677325] ? vfs_write+0x393/0x540 [ 33.681032] ? ksys_write+0x1c8/0x2a0 [ 33.684834] ksys_ioctl+0x9b/0xc0 [ 33.688282] __x64_sys_ioctl+0x6f/0xb0 [ 33.692171] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 33.696832] do_syscall_64+0xf9/0x620 [ 33.700629] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.705803] RIP: 0033:0x7fdc848d8079 [ 33.709508] 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 [ 33.728523] RSP: 002b:00007ffd1df90c48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 33.736227] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fdc848d8079 [ 33.743494] RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000003 [ 33.750763] RBP: 00007ffd1df90c60 R08: 0000000000000002 R09: 0000000000000001 [ 33.758196] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 33.765454] R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 executing program [ 33.830278] FAULT_INJECTION: forcing a failure. [ 33.830278] name failslab, interval 1, probability 0, space 0, times 0 [ 33.842018] CPU: 1 PID: 8122 Comm: syz-executor175 Not tainted 4.19.211-syzkaller #0 [ 33.849892] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.859228] Call Trace: [ 33.861821] dump_stack+0x1fc/0x2ef [ 33.865435] should_fail.cold+0xa/0xf [ 33.869227] ? setup_fault_attr+0x200/0x200 [ 33.873538] ? lock_acquire+0x170/0x3c0 [ 33.877513] __should_failslab+0x115/0x180 [ 33.881730] should_failslab+0x5/0x10 [ 33.885617] kmem_cache_alloc+0x277/0x370 [ 33.889758] __kernfs_new_node+0xd2/0x680 [ 33.893890] ? kernfs_dop_revalidate+0x3a0/0x3a0 [ 33.898628] ? __mutex_unlock_slowpath+0xea/0x610 [ 33.903449] ? wait_for_completion_io+0x10/0x10 [ 33.908097] ? kernfs_next_descendant_post+0x19c/0x290 [ 33.913456] kernfs_new_node+0x92/0x120 [ 33.917433] __kernfs_create_file+0x51/0x340 [ 33.921825] sysfs_add_file_mode_ns+0x226/0x540 [ 33.926488] sysfs_merge_group+0x198/0x320 [ 33.930707] ? sysfs_update_group+0x30/0x30 [ 33.935013] ? kernfs_create_link+0x1b9/0x230 [ 33.939487] ? kernfs_put+0x31/0x50 [ 33.943108] dpm_sysfs_add+0x154/0x210 [ 33.946977] device_add+0xa43/0x16d0 [ 33.950692] ? device_check_offline+0x280/0x280 [ 33.955792] ? kfree_const+0x51/0x60 [ 33.959496] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 33.964493] ? kfree+0x1e2/0x210 [ 33.967865] device_create_groups_vargs+0x1f4/0x270 [ 33.972872] device_create+0xdf/0x120 [ 33.976665] ? device_create_vargs+0x50/0x50 [ 33.981064] ? pointer+0x850/0x850 [ 33.984613] bdi_register_va.part.0+0x4c/0x750 [ 33.989182] bdi_register+0x12a/0x140 [ 33.993058] ? bdi_register_va+0x80/0x80 [ 33.997105] ? vsnprintf+0x2cc/0x14f0 [ 34.000890] bdi_register_owner+0x59/0x100 [ 34.005119] __device_add_disk+0xd58/0x10c0 [ 34.009437] ? sprintf+0xc0/0x100 [ 34.012870] ? blk_alloc_devt+0x2d0/0x2d0 [ 34.017094] ? __raw_spin_lock_init+0x28/0x100 [ 34.021691] ? __lockdep_init_map+0x100/0x5a0 [ 34.026188] loop_add+0x628/0x8a0 [ 34.029633] loop_control_ioctl+0x16c/0x480 [ 34.033946] ? loop_lookup+0x1d0/0x1d0 [ 34.037819] ? __vfs_write+0xff/0x770 [ 34.041610] ? proc_tgid_io_accounting+0x7f0/0x7f0 [ 34.046525] ? common_file_perm+0x4e5/0x850 [ 34.050831] ? loop_lookup+0x1d0/0x1d0 [ 34.054702] do_vfs_ioctl+0xcdb/0x12e0 [ 34.058573] ? vfs_write+0x3d7/0x540 [ 34.062285] ? ioctl_preallocate+0x200/0x200 [ 34.066680] ? lock_downgrade+0x720/0x720 [ 34.070833] ? check_preemption_disabled+0x41/0x280 [ 34.076005] ? vfs_write+0x393/0x540 [ 34.079704] ? ksys_write+0x1c8/0x2a0 [ 34.083491] ksys_ioctl+0x9b/0xc0 [ 34.086928] __x64_sys_ioctl+0x6f/0xb0 [ 34.090846] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 34.095422] do_syscall_64+0xf9/0x620 [ 34.099212] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.104389] RIP: 0033:0x7fdc848d8079 [ 34.108086] 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 [ 34.126973] RSP: 002b:00007ffd1df90c48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 34.134675] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fdc848d8079 [ 34.141938] RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000003 [ 34.149282] RBP: 00007ffd1df90c60 R08: 0000000000000002 R09: 0000000000000001 [ 34.156534] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 34.163784] R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 [ 34.182058] ------------[ cut here ]------------ [ 34.187392] WARNING: CPU: 1 PID: 8122 at block/genhd.c:719 __device_add_disk.cold+0x69/0x188 [ 34.195984] Kernel panic - not syncing: panic_on_warn set ... [ 34.195984] [ 34.203353] CPU: 1 PID: 8122 Comm: syz-executor175 Not tainted 4.19.211-syzkaller #0 [ 34.211317] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.220669] Call Trace: [ 34.223431] dump_stack+0x1fc/0x2ef [ 34.227152] panic+0x26a/0x50e [ 34.230330] ? __warn_printk+0xf3/0xf3 [ 34.234208] ? __device_add_disk.cold+0x69/0x188 [ 34.238969] ? __probe_kernel_read+0x130/0x1b0 [ 34.243535] ? __warn.cold+0x5/0x5a [ 34.247145] ? __warn+0xe4/0x200 [ 34.250506] ? __device_add_disk.cold+0x69/0x188 [ 34.255249] __warn.cold+0x20/0x5a [ 34.258777] ? __device_add_disk.cold+0x69/0x188 [ 34.263516] report_bug+0x262/0x2b0 [ 34.267172] do_error_trap+0x1d7/0x310 [ 34.271040] ? math_error+0x310/0x310 [ 34.274993] ? __irq_work_queue_local+0x101/0x160 [ 34.279817] ? irq_work_queue+0x29/0x80 [ 34.283775] ? error_entry+0x72/0xd0 [ 34.287473] ? trace_hardirqs_off_caller+0x6e/0x210 [ 34.292469] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.297297] invalid_op+0x14/0x20 [ 34.300734] RIP: 0010:__device_add_disk.cold+0x69/0x188 [ 34.306078] 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 [ 34.324971] RSP: 0018:ffff8880b44bfb38 EFLAGS: 00010286 [ 34.330504] RAX: 0000000000000024 RBX: 0000000000000001 RCX: 0000000000000000 [ 34.337752] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed1016897f59 [ 34.345017] RBP: ffff8880b1578c00 R08: 0000000000000024 R09: 0000000000000000 [ 34.352269] R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880b1578c90 [ 34.359583] R13: ffff8880b1579290 R14: 00000000fffffff4 R15: ffff8880b1578c04 [ 34.366845] ? vprintk_func+0x81/0x180 [ 34.370728] ? __device_add_disk.cold+0x69/0x188 [ 34.375465] ? sprintf+0xc0/0x100 [ 34.378900] ? blk_alloc_devt+0x2d0/0x2d0 [ 34.383063] ? __raw_spin_lock_init+0x28/0x100 [ 34.387637] ? __lockdep_init_map+0x100/0x5a0 [ 34.392115] loop_add+0x628/0x8a0 [ 34.395662] loop_control_ioctl+0x16c/0x480 [ 34.399971] ? loop_lookup+0x1d0/0x1d0 [ 34.403854] ? __vfs_write+0xff/0x770 [ 34.407639] ? proc_tgid_io_accounting+0x7f0/0x7f0 [ 34.412572] ? common_file_perm+0x4e5/0x850 [ 34.416882] ? loop_lookup+0x1d0/0x1d0 [ 34.420751] do_vfs_ioctl+0xcdb/0x12e0 [ 34.424618] ? vfs_write+0x3d7/0x540 [ 34.428323] ? ioctl_preallocate+0x200/0x200 [ 34.432811] ? lock_downgrade+0x720/0x720 [ 34.436941] ? check_preemption_disabled+0x41/0x280 [ 34.441958] ? vfs_write+0x393/0x540 [ 34.445915] ? ksys_write+0x1c8/0x2a0 [ 34.449701] ksys_ioctl+0x9b/0xc0 [ 34.453135] __x64_sys_ioctl+0x6f/0xb0 [ 34.457006] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 34.461567] do_syscall_64+0xf9/0x620 [ 34.465349] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.470630] RIP: 0033:0x7fdc848d8079 [ 34.474323] 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 [ 34.493212] RSP: 002b:00007ffd1df90c48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 34.500906] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fdc848d8079 [ 34.508162] RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000003 [ 34.515411] RBP: 00007ffd1df90c60 R08: 0000000000000002 R09: 0000000000000001 [ 34.522671] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 34.529934] R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 [ 34.537591] Kernel Offset: disabled [ 34.541290] Rebooting in 86400 seconds..