INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.12' (ECDSA) to the list of known hosts. 2018/04/16 00:48:02 parsed 1 programs 2018/04/16 00:48:02 executed programs: 0 syzkaller login: [ 99.936500] IPVS: ftp: loaded support on port[0] = 21 [ 99.937345] IPVS: ftp: loaded support on port[0] = 21 [ 99.965151] IPVS: ftp: loaded support on port[0] = 21 [ 99.982158] IPVS: ftp: loaded support on port[0] = 21 [ 99.989202] IPVS: ftp: loaded support on port[0] = 21 [ 99.996868] IPVS: ftp: loaded support on port[0] = 21 [ 100.057280] IPVS: ftp: loaded support on port[0] = 21 [ 100.063548] IPVS: ftp: loaded support on port[0] = 21 [ 100.220173] IPVS: ftp: loaded support on port[0] = 21 [ 100.226696] IPVS: ftp: loaded support on port[0] = 21 [ 100.228164] IPVS: ftp: loaded support on port[0] = 21 [ 100.293738] IPVS: ftp: loaded support on port[0] = 21 [ 100.302656] IPVS: ftp: loaded support on port[0] = 21 [ 100.309558] IPVS: ftp: loaded support on port[0] = 21 [ 100.364875] IPVS: ftp: loaded support on port[0] = 21 [ 100.368554] IPVS: ftp: loaded support on port[0] = 21 [ 100.411958] IPVS: ftp: loaded support on port[0] = 21 [ 100.501225] IPVS: ftp: loaded support on port[0] = 21 [ 100.549038] IPVS: ftp: loaded support on port[0] = 21 [ 100.575699] IPVS: ftp: loaded support on port[0] = 21 [ 100.597781] IPVS: ftp: loaded support on port[0] = 21 [ 100.606494] IPVS: ftp: loaded support on port[0] = 21 [ 100.610381] IPVS: ftp: loaded support on port[0] = 21 [ 100.651606] IPVS: ftp: loaded support on port[0] = 21 [ 100.661377] IPVS: ftp: loaded support on port[0] = 21 [ 100.782980] IPVS: ftp: loaded support on port[0] = 21 [ 100.801076] IPVS: ftp: loaded support on port[0] = 21 [ 100.821012] sysfs: cannot create duplicate filename '/devices/virtual/bdi/7:199-fuseblk' [ 100.829470] CPU: 0 PID: 4619 Comm: syz-executor4 Not tainted 4.16.0+ #4 [ 100.836202] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 100.845536] Call Trace: [ 100.848110] dump_stack+0x1b9/0x294 [ 100.851725] ? dump_stack_print_info.cold.2+0x52/0x52 [ 100.856905] ? trace_hardirqs_on+0xd/0x10 [ 100.861048] sysfs_warn_dup.cold.3+0x1c/0x2b [ 100.865436] sysfs_create_dir_ns+0x184/0x1d0 [ 100.869827] kobject_add_internal+0x353/0xba0 [ 100.874304] ? kobj_ns_type_registered+0x60/0x60 [ 100.879045] ? lock_downgrade+0x8e0/0x8e0 [ 100.883173] ? refcount_add_not_zero+0x320/0x320 [ 100.887907] ? kasan_check_read+0x11/0x20 [ 100.892035] kobject_add+0x13a/0x190 [ 100.895727] ? kset_create_and_add+0x190/0x190 [ 100.896115] IPVS: ftp: loaded support on port[0] = 21 [ 100.900297] ? mutex_unlock+0xd/0x10 [ 100.900323] ? __mutex_unlock_slowpath+0x180/0x8a0 [ 100.900337] device_add+0x3a5/0x16d0 [ 100.917808] ? device_private_init+0x230/0x230 [ 100.922371] ? kfree+0x1e9/0x260 [ 100.925720] ? kfree_const+0x5e/0x70 [ 100.929419] device_create_groups_vargs+0x1ff/0x270 [ 100.934419] device_create_vargs+0x46/0x60 [ 100.938647] bdi_register_va.part.10+0xbb/0x970 [ 100.943299] ? cgwb_kill+0x630/0x630 [ 100.946995] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 100.952512] ? bdi_init+0x416/0x510 [ 100.956119] ? wb_init+0x9e0/0x9e0 [ 100.959637] ? bdi_alloc_node+0x67/0xe0 [ 100.963589] ? bdi_alloc_node+0x67/0xe0 [ 100.967544] ? rcu_read_lock_sched_held+0x108/0x120 [ 100.972541] ? kmem_cache_alloc_node_trace+0x34e/0x770 [ 100.977801] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 100.983318] bdi_register_va+0x68/0x80 [ 100.987184] super_setup_bdi_name+0x123/0x220 [ 100.991659] ? kill_block_super+0x100/0x100 [ 100.995972] ? kmem_cache_alloc_trace+0x616/0x780 [ 101.000806] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 101.005817] fuse_fill_super+0xe6e/0x1e20 [ 101.009954] ? fuse_get_root_inode+0x190/0x190 [ 101.014522] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 101.020047] ? vsnprintf+0x242/0x1b40 [ 101.023830] ? pointer+0xa20/0xa20 [ 101.027354] ? vsprintf+0x40/0x40 [ 101.030788] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 101.035785] ? set_blocksize+0x2c4/0x350 [ 101.039830] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 101.045362] mount_bdev+0x30c/0x3e0 [ 101.048972] ? fuse_get_root_inode+0x190/0x190 [ 101.053533] fuse_mount_blk+0x34/0x40 [ 101.057316] mount_fs+0xae/0x328 [ 101.060668] vfs_kern_mount.part.34+0xd4/0x4d0 [ 101.065233] ? may_umount+0xb0/0xb0 [ 101.068839] ? _raw_read_unlock+0x22/0x30 [ 101.072965] ? __get_fs_type+0x97/0xc0 [ 101.076836] do_mount+0x564/0x3070 [ 101.080362] ? do_raw_spin_unlock+0x9e/0x2e0 [ 101.084751] ? copy_mount_string+0x40/0x40 [ 101.088962] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 101.093973] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 101.098711] ? retint_kernel+0x10/0x10 [ 101.102581] ? copy_mount_options+0x1de/0x380 [ 101.107061] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 101.112576] ? copy_mount_options+0x285/0x380 [ 101.117049] ksys_mount+0x12d/0x140 [ 101.120740] SyS_mount+0x35/0x50 [ 101.124081] ? ksys_mount+0x140/0x140 [ 101.127876] do_syscall_64+0x29e/0x9d0 [ 101.131740] ? vmalloc_sync_all+0x30/0x30 [ 101.135864] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 101.140597] ? syscall_return_slowpath+0x5c0/0x5c0 [ 101.145505] ? syscall_return_slowpath+0x30f/0x5c0 [ 101.150415] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 101.155930] ? retint_user+0x18/0x18 [ 101.159622] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 101.164446] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 101.169614] RIP: 0033:0x455319 [ 101.172788] RSP: 002b:00007ffe86131558 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 101.180475] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000455319 [ 101.187721] RDX: 00000000004b9c85 RSI: 0000000020000080 RDI: 00000000200000c0 [ 101.194980] RBP: 00000000200000c0 R08: 00007ffe86131570 R09: 00524f5252450040 [ 101.202235] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 101.209999] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 101.217436] ------------[ cut here ]------------ [ 101.222209] kobject_add_internal failed for 7:199-fuseblk with -EEXIST, don't try to register things with the same name in the same directory. [ 101.235413] WARNING: CPU: 0 PID: 4619 at lib/kobject.c:238 kobject_add_internal+0x8e0/0xba0 [ 101.243886] Kernel panic - not syncing: panic_on_warn set ... [ 101.243886] [ 101.251233] CPU: 0 PID: 4619 Comm: syz-executor4 Not tainted 4.16.0+ #4 [ 101.257960] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 101.267294] Call Trace: [ 101.269865] dump_stack+0x1b9/0x294 [ 101.273475] ? dump_stack_print_info.cold.2+0x52/0x52 [ 101.278647] ? kobject_add_internal+0x820/0xba0 [ 101.283308] panic+0x22f/0x4de [ 101.286480] ? add_taint.cold.5+0x16/0x16 [ 101.290608] ? __warn.cold.8+0x148/0x1b3 [ 101.294647] ? __warn.cold.8+0x117/0x1b3 [ 101.298698] ? kobject_add_internal+0x8e0/0xba0 [ 101.303356] __warn.cold.8+0x163/0x1b3 [ 101.307232] ? kobject_add_internal+0x8e0/0xba0 [ 101.311888] report_bug+0x252/0x2d0 [ 101.315508] do_error_trap+0x1de/0x490 [ 101.319383] ? math_error+0x420/0x420 [ 101.323254] ? vprintk_default+0x28/0x30 [ 101.327294] ? vprintk_func+0x81/0xe7 [ 101.331073] ? printk+0x9e/0xba [ 101.334336] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 101.339162] do_invalid_op+0x1b/0x20 [ 101.342858] invalid_op+0x1b/0x40 [ 101.346325] RIP: 0010:kobject_add_internal+0x8e0/0xba0 [ 101.351575] RSP: 0018:ffff8801d931f250 EFLAGS: 00010286 [ 101.356915] RAX: 0000000000000082 RBX: ffff8801ab772c10 RCX: ffffffff815f5b3d [ 101.364161] RDX: 0000000000000000 RSI: ffffffff815fa7f1 RDI: ffff8801d931edb0 [ 101.371496] RBP: ffff8801d931f348 R08: ffff8801ab7f4080 R09: 0000000000000006 [ 101.378742] R10: ffff8801ab7f4080 R11: 0000000000000000 R12: 00000000ffffffef [ 101.385987] R13: ffff8801d313bb80 R14: 1ffff1003b263e54 R15: ffff8801d9fc8f00 [ 101.393246] ? console_unlock+0x8ad/0x1100 [ 101.397456] ? vprintk_func+0x81/0xe7 [ 101.401238] ? kobj_ns_type_registered+0x60/0x60 [ 101.405974] ? lock_downgrade+0x8e0/0x8e0 [ 101.410104] ? refcount_add_not_zero+0x320/0x320 [ 101.414840] ? kasan_check_read+0x11/0x20 [ 101.418969] kobject_add+0x13a/0x190 [ 101.422659] ? kset_create_and_add+0x190/0x190 [ 101.427223] ? mutex_unlock+0xd/0x10 [ 101.430913] ? __mutex_unlock_slowpath+0x180/0x8a0 [ 101.435822] device_add+0x3a5/0x16d0 [ 101.439515] ? device_private_init+0x230/0x230 [ 101.444072] ? kfree+0x1e9/0x260 [ 101.447423] ? kfree_const+0x5e/0x70 [ 101.451116] device_create_groups_vargs+0x1ff/0x270 [ 101.456112] device_create_vargs+0x46/0x60 [ 101.460331] bdi_register_va.part.10+0xbb/0x970 [ 101.464978] ? cgwb_kill+0x630/0x630 [ 101.468674] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 101.474191] ? bdi_init+0x416/0x510 [ 101.477812] ? wb_init+0x9e0/0x9e0 [ 101.481340] ? bdi_alloc_node+0x67/0xe0 [ 101.485304] ? bdi_alloc_node+0x67/0xe0 [ 101.489270] ? rcu_read_lock_sched_held+0x108/0x120 [ 101.494273] ? kmem_cache_alloc_node_trace+0x34e/0x770 [ 101.499543] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 101.505070] bdi_register_va+0x68/0x80 [ 101.508942] super_setup_bdi_name+0x123/0x220 [ 101.512966] IPVS: ftp: loaded support on port[0] = 21 [ 101.513415] ? kill_block_super+0x100/0x100 [ 101.513425] ? kmem_cache_alloc_trace+0x616/0x780 [ 101.513434] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 101.513451] fuse_fill_super+0xe6e/0x1e20 [ 101.513463] ? fuse_get_root_inode+0x190/0x190 [ 101.513478] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 101.546951] ? vsnprintf+0x242/0x1b40 [ 101.550734] ? pointer+0xa20/0xa20 [ 101.554256] ? vsprintf+0x40/0x40 [ 101.557691] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 101.562689] ? set_blocksize+0x2c4/0x350 [ 101.566732] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 101.572253] mount_bdev+0x30c/0x3e0 [ 101.575878] ? fuse_get_root_inode+0x190/0x190 [ 101.580452] fuse_mount_blk+0x34/0x40 [ 101.584231] mount_fs+0xae/0x328 [ 101.587584] vfs_kern_mount.part.34+0xd4/0x4d0 [ 101.592155] ? may_umount+0xb0/0xb0 [ 101.595763] ? _raw_read_unlock+0x22/0x30 [ 101.599888] ? __get_fs_type+0x97/0xc0 [ 101.603755] do_mount+0x564/0x3070 [ 101.607279] ? do_raw_spin_unlock+0x9e/0x2e0 [ 101.611675] ? copy_mount_string+0x40/0x40 [ 101.615887] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 101.620883] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 101.625616] ? retint_kernel+0x10/0x10 [ 101.629483] ? copy_mount_options+0x1de/0x380 [ 101.633968] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 101.639493] ? copy_mount_options+0x285/0x380 [ 101.643981] ksys_mount+0x12d/0x140 [ 101.647598] SyS_mount+0x35/0x50 [ 101.650948] ? ksys_mount+0x140/0x140 [ 101.654729] do_syscall_64+0x29e/0x9d0 [ 101.658605] ? vmalloc_sync_all+0x30/0x30 [ 101.662733] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 101.667473] ? syscall_return_slowpath+0x5c0/0x5c0 [ 101.672380] ? syscall_return_slowpath+0x30f/0x5c0 [ 101.677292] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 101.682805] ? retint_user+0x18/0x18 [ 101.686509] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 101.691331] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 101.696498] RIP: 0033:0x455319 [ 101.699661] RSP: 002b:00007ffe86131558 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 101.707346] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000455319 [ 101.714843] RDX: 00000000004b9c85 RSI: 0000000020000080 RDI: 00000000200000c0 [ 101.722103] RBP: 00000000200000c0 R08: 00007ffe86131570 R09: 00524f5252450040 [ 101.729369] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 101.736627] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 101.744661] Dumping ftrace buffer: [ 101.748374] (ftrace buffer empty) [ 101.752062] Kernel Offset: disabled [ 101.755668] Rebooting in 86400 seconds..