[ 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. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.9' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 28.241546] FAULT_INJECTION: forcing a failure. [ 28.241546] name failslab, interval 1, probability 0, space 0, times 1 [ 28.253623] CPU: 0 PID: 7975 Comm: syz-executor333 Not tainted 4.14.276-syzkaller #0 [ 28.261489] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.270819] Call Trace: [ 28.273388] dump_stack+0x1b2/0x281 [ 28.276994] should_fail.cold+0x10a/0x149 [ 28.281120] should_failslab+0xd6/0x130 [ 28.285075] kmem_cache_alloc+0x28e/0x3c0 [ 28.289199] __kernfs_new_node+0x6f/0x470 [ 28.293332] kernfs_new_node+0x7b/0xe0 [ 28.297196] __kernfs_create_file+0x3d/0x320 [ 28.301582] sysfs_add_file_mode_ns+0x1e1/0x450 [ 28.306226] internal_create_group+0x22b/0x710 [ 28.310785] ? exact_match+0x20/0x20 [ 28.314478] sysfs_create_groups+0x92/0x130 [ 28.318871] device_add+0x833/0x15c0 [ 28.322572] ? device_is_dependent+0x2a0/0x2a0 [ 28.327131] device_add_disk+0x6a2/0xdc0 [ 28.331175] ? sprintf+0xa7/0xd0 [ 28.334517] ? blk_alloc_devt+0x310/0x310 [ 28.338644] ? __lockdep_init_map+0x100/0x560 [ 28.343114] ? __lockdep_init_map+0x100/0x560 [ 28.347587] loop_add+0x615/0x830 [ 28.351016] ? loop_queue_rq+0x280/0x280 [ 28.355053] ? loop_queue_work+0x21e0/0x21e0 [ 28.359438] ? do_fault_around+0x35e/0x620 [ 28.363648] loop_control_ioctl+0x11a/0x3f0 [ 28.367944] ? loop_lookup+0x190/0x190 [ 28.371806] ? loop_lookup+0x190/0x190 [ 28.375668] do_vfs_ioctl+0x75a/0xff0 [ 28.379447] ? ioctl_preallocate+0x1a0/0x1a0 [ 28.383836] ? vfs_write+0x319/0x4d0 [ 28.387525] ? SyS_write+0x14d/0x210 [ 28.391218] ? security_file_ioctl+0x83/0xb0 [ 28.395602] SyS_ioctl+0x7f/0xb0 [ 28.398944] ? do_vfs_ioctl+0xff0/0xff0 [ 28.402896] do_syscall_64+0x1d5/0x640 [ 28.406766] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 28.411933] RIP: 0033:0x7f419dbe7689 [ 28.415617] RSP: 002b:00007ffd00001598 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 28.423299] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f419dbe7689 [ 28.430548] RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000003 [ 28.437894] RBP: 00007ffd000015a0 R08: 0000000000000002 R09: 00007f419d003739 [ 28.445141] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 28.452386] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 28.469468] ------------[ cut here ]------------ [ 28.474227] kernel BUG at fs/sysfs/group.c:113! [ 28.479070] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 28.484417] Modules linked in: [ 28.487590] CPU: 1 PID: 7975 Comm: syz-executor333 Not tainted 4.14.276-syzkaller #0 [ 28.495445] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.504774] task: ffff88809a9e2040 task.stack: ffff88808cdc8000 [ 28.510807] RIP: 0010:internal_create_group+0x55f/0x710 [ 28.516143] RSP: 0018:ffff88808cdcfb00 EFLAGS: 00010297 [ 28.521626] RAX: ffff88809a9e2040 RBX: ffff8880af0db460 RCX: 0000000000000000 [ 28.528868] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880af0db460 [ 28.536114] RBP: ffff8880aaaaeef0 R08: ffffffff8b9d3418 R09: 0000000000000000 [ 28.543357] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff88faf460 [ 28.550605] R13: ffff8880aaaaf138 R14: 0000000000000000 R15: ffff8880af0db490 [ 28.557849] FS: 00005555572cf300(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 [ 28.566047] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.571903] CR2: 00005632624ed8f0 CR3: 00000000aac56000 CR4: 00000000003406e0 [ 28.579149] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.586393] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.593639] Call Trace: [ 28.596207] blk_register_queue+0xd3/0x350 [ 28.600418] device_add_disk+0x97c/0xdc0 [ 28.604454] ? sprintf+0xa7/0xd0 [ 28.607795] ? blk_alloc_devt+0x310/0x310 [ 28.611916] ? __lockdep_init_map+0x100/0x560 [ 28.616384] ? __lockdep_init_map+0x100/0x560 [ 28.620858] loop_add+0x615/0x830 [ 28.624284] ? loop_queue_rq+0x280/0x280 [ 28.628316] ? loop_queue_work+0x21e0/0x21e0 [ 28.632696] ? do_fault_around+0x35e/0x620 [ 28.636906] loop_control_ioctl+0x11a/0x3f0 [ 28.641199] ? loop_lookup+0x190/0x190 [ 28.645058] ? loop_lookup+0x190/0x190 [ 28.648921] do_vfs_ioctl+0x75a/0xff0 [ 28.652695] ? ioctl_preallocate+0x1a0/0x1a0 [ 28.657079] ? vfs_write+0x319/0x4d0 [ 28.660769] ? SyS_write+0x14d/0x210 [ 28.664457] ? security_file_ioctl+0x83/0xb0 [ 28.668840] SyS_ioctl+0x7f/0xb0 [ 28.672192] ? do_vfs_ioctl+0xff0/0xff0 [ 28.676145] do_syscall_64+0x1d5/0x640 [ 28.680012] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 28.685186] RIP: 0033:0x7f419dbe7689 [ 28.688875] RSP: 002b:00007ffd00001598 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 28.696558] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f419dbe7689 [ 28.703803] RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000003 [ 28.711045] RBP: 00007ffd000015a0 R08: 0000000000000002 R09: 00007f419d003739 [ 28.718287] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 28.725533] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 28.732776] Code: 48 c1 ea 03 80 3c 02 00 0f 84 9c fd ff ff e8 29 0c db ff e9 92 fd ff ff e8 0f 58 b1 ff 4d 85 f6 0f 85 16 fb ff ff e8 01 58 b1 ff <0f> 0b e8 fa 57 b1 ff 49 83 fe ef 74 18 e8 ef 57 b1 ff 45 89 f7 [ 28.751874] RIP: internal_create_group+0x55f/0x710 RSP: ffff88808cdcfb00 [ 28.759566] ---[ end trace 81aab8d4d82c7505 ]--- [ 28.764346] Kernel panic - not syncing: Fatal exception [ 28.769756] Kernel Offset: disabled [ 28.773362] Rebooting in 86400 seconds..