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 '10.128.10.9' (ECDSA) to the list of known hosts. 2018/04/22 01:58:09 parsed 1 programs 2018/04/22 01:58:09 executed programs: 0 syzkaller login: [ 43.302257] IPVS: ftp: loaded support on port[0] = 21 [ 43.307793] IPVS: ftp: loaded support on port[0] = 21 [ 43.339889] IPVS: ftp: loaded support on port[0] = 21 [ 43.341246] IPVS: ftp: loaded support on port[0] = 21 [ 43.345417] IPVS: ftp: loaded support on port[0] = 21 [ 43.365456] IPVS: ftp: loaded support on port[0] = 21 [ 43.387327] IPVS: ftp: loaded support on port[0] = 21 [ 43.392856] IPVS: ftp: loaded support on port[0] = 21 [ 43.534352] IPVS: ftp: loaded support on port[0] = 21 [ 43.574533] IPVS: ftp: loaded support on port[0] = 21 [ 43.618083] IPVS: ftp: loaded support on port[0] = 21 [ 43.753610] IPVS: ftp: loaded support on port[0] = 21 [ 43.770456] IPVS: ftp: loaded support on port[0] = 21 [ 43.781377] IPVS: ftp: loaded support on port[0] = 21 [ 43.791350] IPVS: ftp: loaded support on port[0] = 21 [ 43.801427] IPVS: ftp: loaded support on port[0] = 21 [ 43.809626] IPVS: ftp: loaded support on port[0] = 21 [ 43.850563] IPVS: ftp: loaded support on port[0] = 21 [ 43.886621] IPVS: ftp: loaded support on port[0] = 21 [ 44.107790] IPVS: ftp: loaded support on port[0] = 21 [ 44.114761] IPVS: ftp: loaded support on port[0] = 21 [ 44.123460] IPVS: ftp: loaded support on port[0] = 21 [ 44.143791] IPVS: ftp: loaded support on port[0] = 21 [ 44.157555] IPVS: ftp: loaded support on port[0] = 21 [ 44.168494] IPVS: ftp: loaded support on port[0] = 21 [ 44.168550] IPVS: ftp: loaded support on port[0] = 21 [ 44.212865] IPVS: ftp: loaded support on port[0] = 21 [ 44.388881] IPVS: ftp: loaded support on port[0] = 21 [ 44.444478] IPVS: ftp: loaded support on port[0] = 21 [ 44.472566] IPVS: ftp: loaded support on port[0] = 21 [ 44.495721] IPVS: ftp: loaded support on port[0] = 21 [ 44.507488] IPVS: ftp: loaded support on port[0] = 21 [ 44.514759] IPVS: ftp: loaded support on port[0] = 21 [ 44.538313] IPVS: ftp: loaded support on port[0] = 21 [ 44.549272] IPVS: ftp: loaded support on port[0] = 21 [ 44.645809] IPVS: ftp: loaded support on port[0] = 21 [ 44.811398] IPVS: ftp: loaded support on port[0] = 21 [ 44.849325] IPVS: ftp: loaded support on port[0] = 21 [ 44.887157] IPVS: ftp: loaded support on port[0] = 21 [ 44.898762] IPVS: ftp: loaded support on port[0] = 21 [ 44.911961] IPVS: ftp: loaded support on port[0] = 21 [ 44.937365] IPVS: ftp: loaded support on port[0] = 21 [ 44.944703] IPVS: ftp: loaded support on port[0] = 21 [ 45.040215] IPVS: ftp: loaded support on port[0] = 21 [ 45.253495] IPVS: ftp: loaded support on port[0] = 21 2018/04/22 01:58:11 result: failed=false hanged=false err=executor 5: failed to write control pipe: write |1: broken pipe lstat(./0/file0) failed (errno 107) loop exited with status 69 (errno 0) [ 45.316096] sysfs: cannot create duplicate filename '/devices/virtual/bdi/7:199-fuseblk' [ 45.323119] IPVS: ftp: loaded support on port[0] = 21 [ 45.324839] CPU: 0 PID: 4676 Comm: syz-executor0 Not tainted 4.17.0-rc1+ #11 [ 45.337201] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.342986] IPVS: ftp: loaded support on port[0] = 21 [ 45.346563] Call Trace: [ 45.346586] dump_stack+0x1b9/0x294 [ 45.346606] ? dump_stack_print_info.cold.2+0x52/0x52 [ 45.346618] ? trace_hardirqs_on+0xd/0x10 [ 45.346639] sysfs_warn_dup.cold.3+0x1c/0x2b [ 45.346658] sysfs_create_dir_ns+0x184/0x1d0 [ 45.346672] kobject_add_internal+0x353/0xba0 [ 45.346689] ? kobj_ns_type_registered+0x60/0x60 [ 45.346705] ? lock_downgrade+0x8e0/0x8e0 [ 45.389536] ? refcount_add_not_zero+0x320/0x320 [ 45.394301] ? kasan_check_read+0x11/0x20 [ 45.398457] kobject_add+0x13a/0x190 [ 45.402186] ? kset_create_and_add+0x190/0x190 [ 45.406781] ? mutex_unlock+0xd/0x10 [ 45.410497] ? __mutex_unlock_slowpath+0x180/0x8a0 [ 45.415452] device_add+0x3a5/0x16d0 [ 45.419175] ? device_private_init+0x230/0x230 [ 45.423762] ? kfree+0x1e9/0x260 [ 45.427142] ? kfree_const+0x5e/0x70 [ 45.430862] device_create_groups_vargs+0x1ff/0x270 [ 45.435884] device_create_vargs+0x46/0x60 [ 45.440124] bdi_register_va.part.10+0xbb/0x970 [ 45.444800] ? cgwb_kill+0x630/0x630 [ 45.448522] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.454062] ? bdi_init+0x416/0x510 [ 45.457692] ? wb_init+0x9e0/0x9e0 [ 45.463752] ? bdi_alloc_node+0x67/0xe0 [ 45.467729] ? bdi_alloc_node+0x67/0xe0 [ 45.471706] ? rcu_read_lock_sched_held+0x108/0x120 [ 45.476723] ? kmem_cache_alloc_node_trace+0x34e/0x770 [ 45.482009] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.487563] bdi_register_va+0x68/0x80 [ 45.489402] IPVS: ftp: loaded support on port[0] = 21 [ 45.491451] super_setup_bdi_name+0x123/0x220 [ 45.491467] ? kill_block_super+0x100/0x100 [ 45.491485] ? kmem_cache_alloc_trace+0x616/0x780 [ 45.491501] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 45.491522] fuse_fill_super+0xe6e/0x1e20 [ 45.511708] IPVS: ftp: loaded support on port[0] = 21 [ 45.515314] ? fuse_get_root_inode+0x190/0x190 [ 45.515337] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 45.515354] ? vsnprintf+0x242/0x1b40 [ 45.515376] ? pointer+0xa20/0xa20 [ 45.542086] ? vsprintf+0x40/0x40 [ 45.545546] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 45.550568] ? set_blocksize+0x2c4/0x350 [ 45.554649] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.560196] mount_bdev+0x30c/0x3e0 [ 45.563835] ? fuse_get_root_inode+0x190/0x190 [ 45.568422] fuse_mount_blk+0x34/0x40 [ 45.572227] mount_fs+0xae/0x328 [ 45.575599] vfs_kern_mount.part.34+0xd4/0x4d0 [ 45.580183] ? may_umount+0xb0/0xb0 [ 45.583814] ? _raw_read_unlock+0x22/0x30 [ 45.587966] ? __get_fs_type+0x97/0xc0 [ 45.591859] do_mount+0x564/0x3070 [ 45.595398] ? do_raw_spin_unlock+0x9e/0x2e0 [ 45.599814] ? copy_mount_string+0x40/0x40 [ 45.604054] ? rcu_pm_notify+0xc0/0xc0 [ 45.607955] ? copy_mount_options+0x5f/0x380 [ 45.612366] ? rcu_read_lock_sched_held+0x108/0x120 [ 45.617386] ? kmem_cache_alloc_trace+0x616/0x780 [ 45.622236] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 45.627786] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.633323] ? copy_mount_options+0x285/0x380 [ 45.637822] ksys_mount+0x12d/0x140 [ 45.641455] __x64_sys_mount+0xbe/0x150 [ 45.645431] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 45.650450] do_syscall_64+0x1b1/0x800 [ 45.654339] ? syscall_return_slowpath+0x5c0/0x5c0 [ 45.659273] ? syscall_return_slowpath+0x30f/0x5c0 [ 45.664207] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.668826] IPVS: ftp: loaded support on port[0] = 21 [ 45.669739] ? retint_user+0x18/0x18 [ 45.669761] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 45.669780] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.669791] RIP: 0033:0x455389 [ 45.669799] RSP: 002b:00007ffff14289a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 45.669817] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000455389 [ 45.706817] RDX: 00000000004b9d05 RSI: 0000000020000000 RDI: 0000000020000040 [ 45.714087] RBP: 0000000020000040 R08: 00007ffff14289c0 R09: 00524f5252450040 [ 45.721355] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 45.728623] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 45.736362] ------------[ cut here ]------------ [ 45.741149] kobject_add_internal failed for 7:199-fuseblk with -EEXIST, don't try to register things with the same name in the same directory. [ 45.754428] WARNING: CPU: 0 PID: 4676 at lib/kobject.c:238 kobject_add_internal+0x8e0/0xba0 [ 45.762920] Kernel panic - not syncing: panic_on_warn set ... [ 45.762920] [ 45.770285] CPU: 0 PID: 4676 Comm: syz-executor0 Not tainted 4.17.0-rc1+ #11 [ 45.777467] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.786813] Call Trace: [ 45.789403] dump_stack+0x1b9/0x294 [ 45.793039] ? dump_stack_print_info.cold.2+0x52/0x52 [ 45.798234] ? kobject_add_internal+0x8e0/0xba0 [ 45.802902] panic+0x22f/0x4de [ 45.806097] ? add_taint.cold.5+0x16/0x16 [ 45.810249] ? __warn.cold.8+0x148/0x1b3 [ 45.814311] ? __warn.cold.8+0x117/0x1b3 [ 45.818375] ? kobject_add_internal+0x8e0/0xba0 [ 45.823047] __warn.cold.8+0x163/0x1b3 [ 45.826938] ? kobject_add_internal+0x8e0/0xba0 [ 45.831610] report_bug+0x252/0x2d0 [ 45.835246] do_error_trap+0x1de/0x490 [ 45.839135] ? math_error+0x420/0x420 [ 45.842936] ? vprintk_default+0x28/0x30 [ 45.846994] ? vprintk_func+0x81/0xe7 [ 45.850794] ? printk+0x9e/0xba [ 45.854076] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 45.858917] do_invalid_op+0x1b/0x20 [ 45.862630] invalid_op+0x14/0x20 [ 45.866080] RIP: 0010:kobject_add_internal+0x8e0/0xba0 [ 45.871343] RSP: 0018:ffff8801d2c3f270 EFLAGS: 00010286 [ 45.876703] RAX: 0000000000000082 RBX: ffff8801d659e910 RCX: ffffffff8160a82d [ 45.883969] RDX: 0000000000000000 RSI: ffffffff8160f4e1 RDI: ffff8801d2c3edd0 [ 45.891238] RBP: ffff8801d2c3f368 R08: ffff8801d6498140 R09: 0000000000000006 [ 45.898509] R10: ffff8801d6498140 R11: 0000000000000000 R12: 00000000ffffffef [ 45.905780] R13: ffff8801d33da000 R14: 1ffff1003a587e58 R15: ffff8801d9bcaf00 [ 45.913069] ? console_unlock+0x8ad/0x1100 [ 45.917304] ? vprintk_func+0x81/0xe7 [ 45.921111] ? kobj_ns_type_registered+0x60/0x60 [ 45.925865] ? lock_downgrade+0x8e0/0x8e0 [ 45.930011] ? refcount_add_not_zero+0x320/0x320 [ 45.934765] ? kasan_check_read+0x11/0x20 [ 45.938913] kobject_add+0x13a/0x190 [ 45.942629] ? kset_create_and_add+0x190/0x190 [ 45.947213] ? mutex_unlock+0xd/0x10 [ 45.950924] ? __mutex_unlock_slowpath+0x180/0x8a0 [ 45.955855] device_add+0x3a5/0x16d0 [ 45.959575] ? device_private_init+0x230/0x230 [ 45.964154] ? kfree+0x1e9/0x260 [ 45.967523] ? kfree_const+0x5e/0x70 [ 45.971236] device_create_groups_vargs+0x1ff/0x270 [ 45.976251] device_create_vargs+0x46/0x60 [ 45.980489] bdi_register_va.part.10+0xbb/0x970 [ 45.985155] ? cgwb_kill+0x630/0x630 [ 45.988869] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.994398] ? bdi_init+0x416/0x510 [ 45.998017] ? wb_init+0x9e0/0x9e0 [ 46.001552] ? bdi_alloc_node+0x67/0xe0 [ 46.005518] ? bdi_alloc_node+0x67/0xe0 [ 46.009491] ? rcu_read_lock_sched_held+0x108/0x120 [ 46.014508] ? kmem_cache_alloc_node_trace+0x34e/0x770 [ 46.019790] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.025330] bdi_register_va+0x68/0x80 [ 46.029218] super_setup_bdi_name+0x123/0x220 [ 46.033707] ? kill_block_super+0x100/0x100 [ 46.038031] ? kmem_cache_alloc_trace+0x616/0x780 [ 46.042874] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 46.047895] fuse_fill_super+0xe6e/0x1e20 [ 46.052051] ? fuse_get_root_inode+0x190/0x190 [ 46.056641] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 46.062175] ? vsnprintf+0x242/0x1b40 [ 46.065975] ? pointer+0xa20/0xa20 [ 46.069521] ? vsprintf+0x40/0x40 [ 46.072976] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 46.077988] ? set_blocksize+0x2c4/0x350 [ 46.082050] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.087588] mount_bdev+0x30c/0x3e0 [ 46.091218] ? fuse_get_root_inode+0x190/0x190 [ 46.095798] fuse_mount_blk+0x34/0x40 [ 46.099603] mount_fs+0xae/0x328 [ 46.102969] vfs_kern_mount.part.34+0xd4/0x4d0 [ 46.107550] ? may_umount+0xb0/0xb0 [ 46.111172] ? _raw_read_unlock+0x22/0x30 [ 46.115318] ? __get_fs_type+0x97/0xc0 [ 46.119206] do_mount+0x564/0x3070 [ 46.122742] ? do_raw_spin_unlock+0x9e/0x2e0 [ 46.127149] ? copy_mount_string+0x40/0x40 [ 46.131379] ? rcu_pm_notify+0xc0/0xc0 [ 46.135270] ? copy_mount_options+0x5f/0x380 [ 46.139677] ? rcu_read_lock_sched_held+0x108/0x120 [ 46.144689] ? kmem_cache_alloc_trace+0x616/0x780 [ 46.149535] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 46.155073] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.160609] ? copy_mount_options+0x285/0x380 [ 46.165103] ksys_mount+0x12d/0x140 [ 46.168728] __x64_sys_mount+0xbe/0x150 [ 46.172699] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 46.177714] do_syscall_64+0x1b1/0x800 [ 46.181605] ? syscall_return_slowpath+0x5c0/0x5c0 [ 46.186531] ? syscall_return_slowpath+0x30f/0x5c0 [ 46.191460] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.196990] ? retint_user+0x18/0x18 [ 46.200706] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.205551] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.210733] RIP: 0033:0x455389 [ 46.213916] RSP: 002b:00007ffff14289a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 46.221632] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000455389 [ 46.228897] RDX: 00000000004b9d05 RSI: 0000000020000000 RDI: 0000000020000040 [ 46.236158] RBP: 0000000020000040 R08: 00007ffff14289c0 R09: 00524f5252450040 [ 46.243420] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 46.250682] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 46.258664] Dumping ftrace buffer: [ 46.262342] (ftrace buffer empty) [ 46.266030] Kernel Offset: disabled [ 46.269641] Rebooting in 86400 seconds..