[ 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 '10.128.0.237' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 33.402138] FAULT_INJECTION: forcing a failure. [ 33.402138] name failslab, interval 1, probability 0, space 0, times 1 [ 33.413947] CPU: 0 PID: 8114 Comm: syz-executor292 Not tainted 4.19.211-syzkaller #0 [ 33.421814] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.431147] Call Trace: [ 33.433714] dump_stack+0x1fc/0x2ef [ 33.437322] should_fail.cold+0xa/0xf [ 33.441103] ? setup_fault_attr+0x200/0x200 [ 33.445410] ? lock_acquire+0x170/0x3c0 [ 33.449366] __should_failslab+0x115/0x180 [ 33.453583] should_failslab+0x5/0x10 [ 33.457362] kmem_cache_alloc+0x277/0x370 [ 33.461490] __kernfs_new_node+0xd2/0x680 [ 33.465617] ? kernfs_dop_revalidate+0x3a0/0x3a0 [ 33.470354] ? __mutex_unlock_slowpath+0xea/0x610 [ 33.475174] ? wait_for_completion_io+0x10/0x10 [ 33.479828] ? kernfs_next_descendant_post+0x19c/0x290 [ 33.485097] kernfs_new_node+0x92/0x120 [ 33.489057] __kernfs_create_file+0x51/0x340 [ 33.493445] sysfs_add_file_mode_ns+0x226/0x540 [ 33.498095] internal_create_group+0x355/0xb20 [ 33.502661] ? sysfs_remove_link_from_group+0x70/0x70 [ 33.507831] ? kernfs_create_link+0x1b9/0x230 [ 33.512303] ? kernfs_put+0x31/0x50 [ 33.515912] sysfs_create_groups+0x98/0x140 [ 33.520215] device_add+0x8cf/0x16d0 [ 33.523910] ? device_check_offline+0x280/0x280 [ 33.528557] ? disk_release+0x310/0x310 [ 33.532511] __device_add_disk+0x62e/0x10c0 [ 33.536810] ? sprintf+0xc0/0x100 [ 33.540239] ? blk_alloc_devt+0x2d0/0x2d0 [ 33.544365] ? __raw_spin_lock_init+0x28/0x100 [ 33.548925] ? __lockdep_init_map+0x100/0x5a0 [ 33.553402] loop_add+0x628/0x8a0 [ 33.556835] loop_control_ioctl+0x16c/0x480 [ 33.561134] ? loop_lookup+0x1d0/0x1d0 [ 33.565008] ? __vfs_write+0xff/0x770 [ 33.568785] ? proc_tgid_io_accounting+0x7f0/0x7f0 [ 33.573780] ? common_file_perm+0x4e5/0x850 [ 33.578094] ? loop_lookup+0x1d0/0x1d0 [ 33.581970] do_vfs_ioctl+0xcdb/0x12e0 [ 33.585850] ? vfs_write+0x3d7/0x540 [ 33.589548] ? ioctl_preallocate+0x200/0x200 [ 33.593940] ? lock_downgrade+0x720/0x720 [ 33.598095] ? check_preemption_disabled+0x41/0x280 [ 33.603102] ? vfs_write+0x393/0x540 [ 33.606808] ? ksys_write+0x1c8/0x2a0 [ 33.610593] ksys_ioctl+0x9b/0xc0 [ 33.614030] __x64_sys_ioctl+0x6f/0xb0 [ 33.618013] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 33.622586] do_syscall_64+0xf9/0x620 [ 33.626379] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.631553] RIP: 0033:0x7fa84313a9e9 [ 33.635248] Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 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 [ 33.654130] RSP: 002b:00007ffcc7de3d88 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 33.661817] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa84313a9e9 [ 33.669065] RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000003 [ 33.676310] RBP: 00007ffcc7de3d90 R08: 0000000000000002 R09: 00007fa843003739 [ 33.683559] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 [ 33.690816] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 33.699251] ------------[ cut here ]------------ [ 33.704011] kernel BUG at fs/sysfs/group.c:115! [ 33.708688] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 33.714046] CPU: 0 PID: 8114 Comm: syz-executor292 Not tainted 4.19.211-syzkaller #0 [ 33.721912] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.731264] RIP: 0010:internal_create_group+0x8ef/0xb20 [ 33.736609] Code: fc ff ff e8 33 46 9d ff 48 8b 7c 24 08 e8 99 1f ff ff e9 55 fe ff ff e8 1f 46 9d ff 48 85 db 0f 85 eb f7 ff ff e8 11 46 9d ff <0f> 0b 41 bd ea ff ff ff e9 35 fe ff ff e8 ff 45 9d ff 48 83 7c 24 [ 33.755750] RSP: 0018:ffff8880917bf9f8 EFLAGS: 00010293 [ 33.761099] RAX: ffff88809538a640 RBX: 0000000000000000 RCX: ffffffff81c5372e [ 33.768363] RDX: 0000000000000000 RSI: ffffffff81c53f5f RDI: 0000000000000005 [ 33.775615] RBP: ffff888094cc0490 R08: 0000000000000000 R09: 0000000000000000 [ 33.782870] R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000000 [ 33.790114] R13: ffff888094cc0450 R14: ffff888094cc0460 R15: 0000000000000000 [ 33.797361] FS: 00005555559f53c0(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 33.805563] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.811417] CR2: 000055e19835d410 CR3: 0000000099408000 CR4: 00000000003406f0 [ 33.818669] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.826003] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.833337] Call Trace: [ 33.835910] ? sysfs_remove_link_from_group+0x70/0x70 [ 33.841078] ? mark_held_locks+0xa6/0xf0 [ 33.845119] ? _raw_spin_unlock_irq+0x24/0x80 [ 33.849591] blk_register_queue+0x12c/0x5b0 [ 33.853889] __device_add_disk+0xe1d/0x10c0 [ 33.858186] ? sprintf+0xc0/0x100 [ 33.861614] ? blk_alloc_devt+0x2d0/0x2d0 [ 33.865737] ? __raw_spin_lock_init+0x28/0x100 [ 33.870295] ? __lockdep_init_map+0x100/0x5a0 [ 33.874769] loop_add+0x628/0x8a0 [ 33.878201] loop_control_ioctl+0x16c/0x480 [ 33.882498] ? loop_lookup+0x1d0/0x1d0 [ 33.886385] ? __vfs_write+0xff/0x770 [ 33.890162] ? proc_tgid_io_accounting+0x7f0/0x7f0 [ 33.895066] ? common_file_perm+0x4e5/0x850 [ 33.899362] ? loop_lookup+0x1d0/0x1d0 [ 33.903227] do_vfs_ioctl+0xcdb/0x12e0 [ 33.907092] ? vfs_write+0x3d7/0x540 [ 33.910783] ? ioctl_preallocate+0x200/0x200 [ 33.915167] ? lock_downgrade+0x720/0x720 [ 33.919293] ? check_preemption_disabled+0x41/0x280 [ 33.924288] ? vfs_write+0x393/0x540 [ 33.928003] ? ksys_write+0x1c8/0x2a0 [ 33.931788] ksys_ioctl+0x9b/0xc0 [ 33.935219] __x64_sys_ioctl+0x6f/0xb0 [ 33.939084] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 33.943645] do_syscall_64+0xf9/0x620 [ 33.947422] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.952595] RIP: 0033:0x7fa84313a9e9 [ 33.956287] Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 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 [ 33.975164] RSP: 002b:00007ffcc7de3d88 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 33.982847] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa84313a9e9 [ 33.990091] RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000003 [ 33.997337] RBP: 00007ffcc7de3d90 R08: 0000000000000002 R09: 00007fa843003739 [ 34.004582] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 [ 34.011830] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 34.019080] Modules linked in: [ 34.022830] ---[ end trace 06d6163fa020f785 ]--- [ 34.027597] RIP: 0010:internal_create_group+0x8ef/0xb20 [ 34.033101] Code: fc ff ff e8 33 46 9d ff 48 8b 7c 24 08 e8 99 1f ff ff e9 55 fe ff ff e8 1f 46 9d ff 48 85 db 0f 85 eb f7 ff ff e8 11 46 9d ff <0f> 0b 41 bd ea ff ff ff e9 35 fe ff ff e8 ff 45 9d ff 48 83 7c 24 [ 34.052435] RSP: 0018:ffff8880917bf9f8 EFLAGS: 00010293 [ 34.057781] RAX: ffff88809538a640 RBX: 0000000000000000 RCX: ffffffff81c5372e [ 34.065120] RDX: 0000000000000000 RSI: ffffffff81c53f5f RDI: 0000000000000005 [ 34.072427] RBP: ffff888094cc0490 R08: 0000000000000000 R09: 0000000000000000 [ 34.079960] R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000000 [ 34.087214] R13: ffff888094cc0450 R14: ffff888094cc0460 R15: 0000000000000000 [ 34.094507] FS: 00005555559f53c0(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 34.102771] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 34.108669] CR2: 000055e19835d410 CR3: 0000000099408000 CR4: 00000000003406f0 [ 34.115931] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.123226] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.130533] Kernel panic - not syncing: Fatal exception [ 34.135938] Kernel Offset: disabled [ 34.139542] Rebooting in 86400 seconds..