[ 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 '10.128.0.37' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 31.364438] FAULT_INJECTION: forcing a failure. [ 31.364438] name failslab, interval 1, probability 0, space 0, times 1 [ 31.375796] CPU: 0 PID: 7985 Comm: syz-executor404 Not tainted 4.14.304-syzkaller #0 [ 31.383661] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 [ 31.392998] Call Trace: [ 31.395567] dump_stack+0x1b2/0x281 [ 31.399180] should_fail.cold+0x10a/0x149 [ 31.403311] should_failslab+0xd6/0x130 [ 31.407259] __kmalloc+0x2c1/0x400 [ 31.410773] ? kobject_get_path+0xb5/0x230 [ 31.414981] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 31.420409] kobject_get_path+0xb5/0x230 [ 31.424454] kobject_uevent_env+0x230/0xf30 [ 31.428851] ? wait_for_completion_io+0x10/0x10 [ 31.433505] device_add+0xa47/0x15c0 [ 31.437204] ? device_is_dependent+0x2a0/0x2a0 [ 31.441766] ? kfree+0x1f0/0x250 [ 31.445113] device_create_groups_vargs+0x1dc/0x250 [ 31.450104] device_create_vargs+0x3a/0x50 [ 31.454318] bdi_register_va.part.0+0x35/0x650 [ 31.458879] bdi_register+0x101/0x110 [ 31.462655] ? bdi_register_va+0x80/0x80 [ 31.466692] ? vsnprintf+0x260/0x1340 [ 31.470470] bdi_register_owner+0x59/0xf0 [ 31.474600] device_add_disk+0x5bb/0xdc0 [ 31.478637] ? sprintf+0xa7/0xd0 [ 31.481979] ? blk_alloc_devt+0x310/0x310 [ 31.486100] ? __lockdep_init_map+0x100/0x560 [ 31.490568] ? __lockdep_init_map+0x100/0x560 [ 31.495388] loop_add+0x615/0x830 [ 31.498824] ? loop_queue_rq+0x280/0x280 [ 31.502861] ? loop_queue_work+0x21e0/0x21e0 [ 31.507240] ? do_fault_around+0x35e/0x620 [ 31.511463] loop_control_ioctl+0x11a/0x3f0 [ 31.515757] ? loop_lookup+0x190/0x190 [ 31.519640] ? loop_lookup+0x190/0x190 [ 31.523503] do_vfs_ioctl+0x75a/0xff0 [ 31.527280] ? ioctl_preallocate+0x1a0/0x1a0 [ 31.531675] ? vfs_write+0x319/0x4d0 [ 31.535362] ? SyS_write+0x14d/0x210 [ 31.539096] ? security_file_ioctl+0x83/0xb0 [ 31.543486] SyS_ioctl+0x7f/0xb0 [ 31.546824] ? do_vfs_ioctl+0xff0/0xff0 [ 31.550789] do_syscall_64+0x1d5/0x640 [ 31.554660] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 31.559826] RIP: 0033:0x7f6ef2a77089 executing program [ 31.563510] RSP: 002b:00007ffec1054288 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 31.571216] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f6ef2a77089 [ 31.578463] RDX: 000000000000000b RSI: 0000000000004c80 RDI: 0000000000000003 [ 31.585709] RBP: 00007ffec10542a0 R08: 0000000000000002 R09: 0000000000000001 [ 31.592966] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 31.600211] R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 [ 31.648593] FAULT_INJECTION: forcing a failure. [ 31.648593] name failslab, interval 1, probability 0, space 0, times 0 [ 31.659843] CPU: 1 PID: 7991 Comm: syz-executor404 Not tainted 4.14.304-syzkaller #0 [ 31.667715] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 [ 31.677044] Call Trace: [ 31.679626] dump_stack+0x1b2/0x281 [ 31.683230] should_fail.cold+0x10a/0x149 [ 31.687356] should_failslab+0xd6/0x130 [ 31.691311] kmem_cache_alloc+0x28e/0x3c0 [ 31.695438] __kernfs_new_node+0x6f/0x470 [ 31.699574] kernfs_new_node+0x7b/0xe0 [ 31.703437] __kernfs_create_file+0x3d/0x320 [ 31.707821] sysfs_add_file_mode_ns+0x1e1/0x450 [ 31.712467] sysfs_merge_group+0xdc/0x200 [ 31.716592] dpm_sysfs_add+0x122/0x1c0 [ 31.720455] device_add+0x977/0x15c0 [ 31.724152] ? device_is_dependent+0x2a0/0x2a0 [ 31.728708] ? kfree+0x1f0/0x250 [ 31.732050] device_create_groups_vargs+0x1dc/0x250 [ 31.737052] device_create_vargs+0x3a/0x50 [ 31.741298] bdi_register_va.part.0+0x35/0x650 [ 31.745862] bdi_register+0x101/0x110 [ 31.749643] ? bdi_register_va+0x80/0x80 [ 31.753680] ? vsnprintf+0x260/0x1340 [ 31.757455] bdi_register_owner+0x59/0xf0 [ 31.761580] device_add_disk+0x5bb/0xdc0 [ 31.765619] ? sprintf+0xa7/0xd0 [ 31.769061] ? blk_alloc_devt+0x310/0x310 [ 31.773189] ? __lockdep_init_map+0x100/0x560 [ 31.777661] ? __lockdep_init_map+0x100/0x560 [ 31.782135] loop_add+0x615/0x830 [ 31.785568] ? loop_queue_rq+0x280/0x280 [ 31.789613] ? loop_queue_work+0x21e0/0x21e0 [ 31.794005] ? do_fault_around+0x35e/0x620 [ 31.798237] loop_control_ioctl+0x11a/0x3f0 [ 31.802547] ? loop_lookup+0x190/0x190 [ 31.806443] ? loop_lookup+0x190/0x190 [ 31.810313] do_vfs_ioctl+0x75a/0xff0 [ 31.814093] ? ioctl_preallocate+0x1a0/0x1a0 [ 31.818479] ? vfs_write+0x319/0x4d0 [ 31.822173] ? SyS_write+0x14d/0x210 [ 31.825886] ? security_file_ioctl+0x83/0xb0 [ 31.830279] SyS_ioctl+0x7f/0xb0 [ 31.833634] ? do_vfs_ioctl+0xff0/0xff0 [ 31.837587] do_syscall_64+0x1d5/0x640 [ 31.841454] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 31.846646] RIP: 0033:0x7f6ef2a77089 [ 31.850332] RSP: 002b:00007ffec1054288 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 31.858036] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f6ef2a77089 [ 31.865298] RDX: 000000000000000b RSI: 0000000000004c80 RDI: 0000000000000003 [ 31.872549] RBP: 00007ffec10542a0 R08: 0000000000000002 R09: 0000000000000001 [ 31.879797] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 31.887042] R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 [ 31.907049] kasan: CONFIG_KASAN_INLINE enabled [ 31.911814] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 31.919324] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 31.925550] Modules linked in: [ 31.928723] CPU: 0 PID: 7991 Comm: syz-executor404 Not tainted 4.14.304-syzkaller #0 [ 31.936589] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 [ 31.945918] task: ffff8880b3f4c580 task.stack: ffff888095970000 [ 31.951966] RIP: 0010:sysfs_do_create_link_sd+0x56/0x120 [ 31.957397] RSP: 0018:ffff888095977b48 EFLAGS: 00010202 [ 31.962734] RAX: dffffc0000000000 RBX: 0000000000000010 RCX: 0000000000006eda [ 31.970111] RDX: 0000000000000008 RSI: 0000000000000001 RDI: 0000000000000040 [ 31.977356] RBP: ffffffff87cbd760 R08: ffffffff8b9dc1d0 R09: 00000000000400ca [ 31.984612] R10: ffff8880b3f4ce30 R11: ffff8880b3f4c580 R12: ffff8880aee5e460 [ 31.991942] R13: ffffffff87cbd760 R14: 0000000000000001 R15: ffff8880b2d60bdc [ 31.999184] FS: 00005555556db300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 32.007379] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 32.013234] CR2: 00005634cd6b7848 CR3: 00000000ae7bc000 CR4: 00000000003406f0 [ 32.020482] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 32.027743] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 32.034995] Call Trace: [ 32.037560] sysfs_create_link+0x5f/0xc0 [ 32.041596] device_add_disk+0x9f8/0xdc0 [ 32.045631] ? sprintf+0xa7/0xd0 [ 32.049002] ? blk_alloc_devt+0x310/0x310 [ 32.053124] ? __lockdep_init_map+0x100/0x560 [ 32.057598] ? __lockdep_init_map+0x100/0x560 [ 32.062070] loop_add+0x615/0x830 [ 32.065498] ? loop_queue_rq+0x280/0x280 [ 32.069537] ? loop_queue_work+0x21e0/0x21e0 [ 32.073918] ? do_fault_around+0x35e/0x620 [ 32.078142] loop_control_ioctl+0x11a/0x3f0 [ 32.082436] ? loop_lookup+0x190/0x190 [ 32.086295] ? loop_lookup+0x190/0x190 [ 32.090153] do_vfs_ioctl+0x75a/0xff0 [ 32.093931] ? ioctl_preallocate+0x1a0/0x1a0 [ 32.098342] ? vfs_write+0x319/0x4d0 [ 32.102033] ? SyS_write+0x14d/0x210 [ 32.105725] ? security_file_ioctl+0x83/0xb0 [ 32.110128] SyS_ioctl+0x7f/0xb0 [ 32.113475] ? do_vfs_ioctl+0xff0/0xff0 [ 32.117425] do_syscall_64+0x1d5/0x640 [ 32.121293] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 32.126461] RIP: 0033:0x7f6ef2a77089 [ 32.130144] RSP: 002b:00007ffec1054288 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 32.137828] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f6ef2a77089 [ 32.145075] RDX: 000000000000000b RSI: 0000000000004c80 RDI: 0000000000000003 [ 32.152317] RBP: 00007ffec10542a0 R08: 0000000000000002 R09: 0000000000000001 [ 32.159558] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 32.166825] R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 [ 32.174071] Code: 84 a1 00 00 00 e8 db 49 b1 ff 48 c7 c7 00 d9 04 89 e8 1f e3 80 05 48 8d 7b 30 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 a7 00 00 00 4c 8b 6b 30 4d 85 ed 74 4f e8 a2 [ 32.193134] RIP: sysfs_do_create_link_sd+0x56/0x120 RSP: ffff888095977b48 [ 32.200082] ---[ end trace 1605dba8dda8303a ]--- [ 32.204824] Kernel panic - not syncing: Fatal exception [ 32.210344] Kernel Offset: disabled [ 32.213951] Rebooting in 86400 seconds..