Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.8' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 33.805093] FAULT_INJECTION: forcing a failure. [ 33.805093] name failslab, interval 1, probability 0, space 0, times 1 [ 33.816458] CPU: 1 PID: 8129 Comm: syz-executor593 Not tainted 4.19.211-syzkaller #0 [ 33.824325] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 [ 33.833675] Call Trace: [ 33.836267] dump_stack+0x1fc/0x2ef [ 33.839881] should_fail.cold+0xa/0xf [ 33.843670] ? setup_fault_attr+0x200/0x200 [ 33.847973] ? lock_acquire+0x170/0x3c0 [ 33.851956] __should_failslab+0x115/0x180 [ 33.856173] should_failslab+0x5/0x10 [ 33.859954] kmem_cache_alloc+0x277/0x370 [ 33.864083] __kernfs_new_node+0xd2/0x680 [ 33.868214] ? kernfs_dop_revalidate+0x3a0/0x3a0 [ 33.872962] ? __mutex_unlock_slowpath+0xea/0x610 [ 33.877789] ? wait_for_completion_io+0x10/0x10 [ 33.882441] ? kernfs_next_descendant_post+0x19c/0x290 [ 33.887792] kernfs_new_node+0x92/0x120 [ 33.891753] __kernfs_create_file+0x51/0x340 [ 33.896146] sysfs_add_file_mode_ns+0x226/0x540 [ 33.900799] sysfs_merge_group+0x198/0x320 [ 33.905012] ? sysfs_update_group+0x30/0x30 [ 33.909335] ? kernfs_create_link+0x1b9/0x230 [ 33.913812] ? kernfs_put+0x31/0x50 [ 33.917421] dpm_sysfs_add+0x154/0x210 [ 33.921307] device_add+0xa43/0x16d0 [ 33.925016] ? device_check_offline+0x280/0x280 [ 33.929666] ? kfree_const+0x51/0x60 [ 33.933360] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 33.938356] ? kfree+0x1e2/0x210 [ 33.941708] device_create_groups_vargs+0x1f4/0x270 [ 33.946728] device_create+0xdf/0x120 [ 33.950520] ? device_create_vargs+0x50/0x50 [ 33.954922] ? pointer+0x850/0x850 [ 33.958452] bdi_register_va.part.0+0x4c/0x750 [ 33.963017] bdi_register+0x12a/0x140 [ 33.966796] ? bdi_register_va+0x80/0x80 [ 33.970839] ? vsnprintf+0x2cc/0x14f0 [ 33.974623] bdi_register_owner+0x59/0x100 [ 33.978843] __device_add_disk+0xd58/0x10c0 [ 33.983169] ? sprintf+0xc0/0x100 [ 33.986609] ? blk_alloc_devt+0x2d0/0x2d0 [ 33.990741] ? __raw_spin_lock_init+0x28/0x100 [ 33.995317] ? __lockdep_init_map+0x100/0x5a0 [ 33.999806] loop_add+0x628/0x8a0 [ 34.003242] loop_control_ioctl+0x16c/0x480 [ 34.007550] ? loop_lookup+0x1d0/0x1d0 [ 34.011436] ? __vfs_write+0xff/0x770 [ 34.015234] ? proc_tgid_io_accounting+0x7f0/0x7f0 [ 34.020167] ? common_file_perm+0x4e5/0x850 [ 34.024470] ? loop_lookup+0x1d0/0x1d0 [ 34.028340] do_vfs_ioctl+0xcdb/0x12e0 [ 34.032226] ? vfs_write+0x3d7/0x540 [ 34.035947] ? ioctl_preallocate+0x200/0x200 [ 34.040346] ? lock_downgrade+0x720/0x720 [ 34.044509] ? check_preemption_disabled+0x41/0x280 [ 34.049538] ? vfs_write+0x393/0x540 [ 34.053238] ? ksys_write+0x1c8/0x2a0 [ 34.057034] ksys_ioctl+0x9b/0xc0 [ 34.060499] __x64_sys_ioctl+0x6f/0xb0 [ 34.064383] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 34.068950] do_syscall_64+0xf9/0x620 [ 34.072734] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.077910] RIP: 0033:0x7f30d5d29089 [ 34.081615] 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 [ 34.100495] RSP: 002b:00007ffe5ac658a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 34.108193] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f30d5d29089 [ 34.115453] RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000003 [ 34.122707] RBP: 00007ffe5ac658c0 R08: 0000000000000002 R09: 0000000000000001 [ 34.129956] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 34.137209] R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 [ 34.150376] ------------[ cut here ]------------ [ 34.155789] WARNING: CPU: 0 PID: 8129 at block/genhd.c:719 __device_add_disk.cold+0x69/0x188 [ 34.164377] Kernel panic - not syncing: panic_on_warn set ... [ 34.164377] [ 34.171781] CPU: 0 PID: 8129 Comm: syz-executor593 Not tainted 4.19.211-syzkaller #0 [ 34.179654] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 [ 34.189000] Call Trace: [ 34.191571] dump_stack+0x1fc/0x2ef [ 34.195181] panic+0x26a/0x50e [ 34.198357] ? __warn_printk+0xf3/0xf3 [ 34.202228] ? __device_add_disk.cold+0x69/0x188 [ 34.207140] ? __probe_kernel_read+0x130/0x1b0 [ 34.211700] ? __warn.cold+0x5/0x5a [ 34.215305] ? __warn+0xe4/0x200 [ 34.218698] ? __device_add_disk.cold+0x69/0x188 [ 34.223438] __warn.cold+0x20/0x5a [ 34.226962] ? io_schedule_timeout+0x140/0x140 [ 34.231531] ? __device_add_disk.cold+0x69/0x188 [ 34.236282] report_bug+0x262/0x2b0 [ 34.239905] do_error_trap+0x1d7/0x310 [ 34.243793] ? math_error+0x310/0x310 [ 34.247598] ? __irq_work_queue_local+0x101/0x160 [ 34.252445] ? irq_work_queue+0x29/0x80 [ 34.256407] ? error_entry+0x72/0xd0 [ 34.260104] ? trace_hardirqs_off_caller+0x6e/0x210 [ 34.265196] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.270116] invalid_op+0x14/0x20 [ 34.273554] RIP: 0010:__device_add_disk.cold+0x69/0x188 [ 34.278898] 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 [ 34.297807] RSP: 0018:ffff8880a250fb38 EFLAGS: 00010286 [ 34.303158] RAX: 0000000000000024 RBX: 0000000000000001 RCX: 0000000000000000 [ 34.310410] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed10144a1f59 [ 34.317679] RBP: ffff8880b016e100 R08: 0000000000000024 R09: 0000000000000000 [ 34.324930] R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880b016e190 [ 34.332196] R13: ffff8880b016e790 R14: 00000000fffffff4 R15: ffff8880b016e104 [ 34.339474] ? vprintk_func+0x81/0x180 [ 34.343346] ? __device_add_disk.cold+0x69/0x188 [ 34.348088] ? sprintf+0xc0/0x100 [ 34.351524] ? blk_alloc_devt+0x2d0/0x2d0 [ 34.355669] ? __raw_spin_lock_init+0x28/0x100 [ 34.360241] ? __lockdep_init_map+0x100/0x5a0 [ 34.364739] loop_add+0x628/0x8a0 [ 34.368181] loop_control_ioctl+0x16c/0x480 [ 34.372485] ? loop_lookup+0x1d0/0x1d0 [ 34.376357] ? __vfs_write+0xff/0x770 [ 34.380144] ? proc_tgid_io_accounting+0x7f0/0x7f0 [ 34.385056] ? common_file_perm+0x4e5/0x850 [ 34.389357] ? loop_lookup+0x1d0/0x1d0 [ 34.393241] do_vfs_ioctl+0xcdb/0x12e0 [ 34.397110] ? vfs_write+0x3d7/0x540 [ 34.400805] ? ioctl_preallocate+0x200/0x200 [ 34.405195] ? lock_downgrade+0x720/0x720 [ 34.409323] ? check_preemption_disabled+0x41/0x280 [ 34.414321] ? vfs_write+0x393/0x540 [ 34.418024] ? ksys_write+0x1c8/0x2a0 [ 34.421812] ksys_ioctl+0x9b/0xc0 [ 34.425246] __x64_sys_ioctl+0x6f/0xb0 [ 34.429117] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 34.433677] do_syscall_64+0xf9/0x620 [ 34.437489] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.442677] RIP: 0033:0x7f30d5d29089 [ 34.446372] 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 [ 34.465255] RSP: 002b:00007ffe5ac658a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 34.472944] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f30d5d29089 [ 34.480192] RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000003 [ 34.487441] RBP: 00007ffe5ac658c0 R08: 0000000000000002 R09: 0000000000000001 [ 34.494689] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 34.501937] R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 [ 34.509564] Kernel Offset: disabled [ 34.513242] Rebooting in 86400 seconds..