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 '10.128.0.61' (ECDSA) to the list of known hosts. 2018/04/15 04:30:49 parsed 1 programs 2018/04/15 04:30:49 executed programs: 0 syzkaller login: [ 92.610612] IPVS: ftp: loaded support on port[0] = 21 [ 92.623644] IPVS: ftp: loaded support on port[0] = 21 [ 92.624304] IPVS: ftp: loaded support on port[0] = 21 [ 92.641832] IPVS: ftp: loaded support on port[0] = 21 [ 92.645467] IPVS: ftp: loaded support on port[0] = 21 [ 92.652396] IPVS: ftp: loaded support on port[0] = 21 [ 92.658708] IPVS: ftp: loaded support on port[0] = 21 [ 92.659791] IPVS: ftp: loaded support on port[0] = 21 2018/04/15 04:30:49 result: failed=false hanged=false err=executor 2: failed to write control pipe: write |1: broken pipe lstat(./0/file0) failed (errno 107) loop exited with status 69 (errno 0) [ 92.919270] IPVS: ftp: loaded support on port[0] = 21 [ 92.941829] IPVS: ftp: loaded support on port[0] = 21 [ 92.943342] IPVS: ftp: loaded support on port[0] = 21 [ 92.965789] IPVS: ftp: loaded support on port[0] = 21 [ 92.971490] IPVS: ftp: loaded support on port[0] = 21 [ 92.980761] IPVS: ftp: loaded support on port[0] = 21 [ 92.994118] IPVS: ftp: loaded support on port[0] = 21 [ 93.000927] IPVS: ftp: loaded support on port[0] = 21 [ 93.153168] IPVS: ftp: loaded support on port[0] = 21 [ 93.204744] IPVS: ftp: loaded support on port[0] = 21 [ 93.223626] IPVS: ftp: loaded support on port[0] = 21 [ 93.257378] IPVS: ftp: loaded support on port[0] = 21 [ 93.291727] IPVS: ftp: loaded support on port[0] = 21 [ 93.294192] IPVS: ftp: loaded support on port[0] = 21 [ 93.297816] IPVS: ftp: loaded support on port[0] = 21 [ 93.328402] IPVS: ftp: loaded support on port[0] = 21 [ 93.389617] IPVS: ftp: loaded support on port[0] = 21 [ 93.420236] IPVS: ftp: loaded support on port[0] = 21 [ 93.466972] IPVS: ftp: loaded support on port[0] = 21 [ 93.500068] sysfs: cannot create duplicate filename '/devices/virtual/bdi/7:199-fuseblk' [ 93.508470] CPU: 0 PID: 4555 Comm: syz-executor3 Not tainted 4.16.0+ #3 [ 93.515220] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 93.524556] Call Trace: [ 93.527132] dump_stack+0x1b9/0x294 [ 93.530743] ? dump_stack_print_info.cold.2+0x52/0x52 [ 93.535937] ? trace_hardirqs_on+0xd/0x10 [ 93.540082] sysfs_warn_dup.cold.3+0x1c/0x2b [ 93.544466] IPVS: ftp: loaded support on port[0] = 21 [ 93.549646] sysfs_create_dir_ns+0x184/0x1d0 [ 93.554053] kobject_add_internal+0x353/0xba0 [ 93.555294] IPVS: ftp: loaded support on port[0] = 21 [ 93.558540] ? kobj_ns_type_registered+0x60/0x60 [ 93.568504] ? lock_downgrade+0x8e0/0x8e0 [ 93.572643] ? refcount_add_not_zero+0x320/0x320 [ 93.577384] ? kasan_check_read+0x11/0x20 [ 93.581520] kobject_add+0x13a/0x190 [ 93.585223] ? kset_create_and_add+0x190/0x190 [ 93.589795] ? mutex_unlock+0xd/0x10 [ 93.593490] ? __mutex_unlock_slowpath+0x180/0x8a0 [ 93.599460] device_add+0x3a5/0x16d0 [ 93.603166] ? device_private_init+0x230/0x230 [ 93.607729] ? kfree+0x1e9/0x260 [ 93.611087] ? kfree_const+0x5e/0x70 [ 93.614793] device_create_groups_vargs+0x1ff/0x270 [ 93.619795] device_create_vargs+0x46/0x60 [ 93.624035] bdi_register_va.part.10+0xbb/0x970 [ 93.628687] ? cgwb_kill+0x630/0x630 [ 93.632382] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 93.637896] ? bdi_init+0x416/0x510 [ 93.641504] ? wb_init+0x9e0/0x9e0 [ 93.645025] ? bdi_alloc_node+0x67/0xe0 [ 93.648979] ? bdi_alloc_node+0x67/0xe0 [ 93.652941] ? rcu_read_lock_sched_held+0x108/0x120 [ 93.657936] ? kmem_cache_alloc_node_trace+0x34e/0x770 [ 93.663199] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 93.672976] ? refcount_sub_and_test+0x212/0x330 [ 93.677718] bdi_register_va+0x68/0x80 [ 93.681590] super_setup_bdi_name+0x123/0x220 [ 93.686076] ? kill_block_super+0x100/0x100 [ 93.690385] ? kmem_cache_alloc_trace+0x616/0x780 [ 93.695382] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 93.700395] fuse_fill_super+0xe6e/0x1e20 [ 93.704535] ? fuse_get_root_inode+0x190/0x190 [ 93.709124] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 93.714647] ? vsnprintf+0x242/0x1b40 [ 93.718434] ? pointer+0xa20/0xa20 [ 93.721963] ? vsprintf+0x40/0x40 [ 93.725411] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 93.730412] ? set_blocksize+0x2c4/0x350 [ 93.734549] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 93.740082] mount_bdev+0x30c/0x3e0 [ 93.743693] ? fuse_get_root_inode+0x190/0x190 [ 93.748269] fuse_mount_blk+0x34/0x40 [ 93.752053] mount_fs+0xae/0x328 [ 93.755409] vfs_kern_mount.part.34+0xd4/0x4d0 [ 93.759985] ? may_umount+0xb0/0xb0 [ 93.763598] ? _raw_read_unlock+0x22/0x30 [ 93.767740] ? __get_fs_type+0x97/0xc0 [ 93.771617] do_mount+0x564/0x3070 [ 93.775144] ? do_raw_spin_unlock+0x9e/0x2e0 [ 93.779797] ? copy_mount_string+0x40/0x40 [ 93.784012] ? rcu_pm_notify+0xc0/0xc0 [ 93.787885] ? copy_mount_options+0x5f/0x380 [ 93.792278] ? rcu_read_lock_sched_held+0x108/0x120 [ 93.797278] ? kmem_cache_alloc_trace+0x616/0x780 [ 93.802104] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 93.807633] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 93.813166] ? copy_mount_options+0x285/0x380 [ 93.817645] ksys_mount+0x12d/0x140 [ 93.821268] SyS_mount+0x35/0x50 [ 93.824617] ? ksys_mount+0x140/0x140 [ 93.828403] do_syscall_64+0x29e/0x9d0 [ 93.832273] ? vmalloc_sync_all+0x30/0x30 [ 93.836404] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 93.841153] ? syscall_return_slowpath+0x5c0/0x5c0 [ 93.846499] ? syscall_return_slowpath+0x30f/0x5c0 [ 93.851415] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 93.856948] ? retint_user+0x18/0x18 [ 93.860650] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 93.865479] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 93.870658] RIP: 0033:0x455319 [ 93.873838] RSP: 002b:00007ffdac87b468 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 93.881532] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000455319 [ 93.888779] RDX: 00000000004b9c85 RSI: 0000000020000100 RDI: 0000000020000140 [ 93.896028] RBP: 0000000020000140 R08: 00007ffdac87b480 R09: 00524f5252450040 [ 93.903281] R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000000 [ 93.910534] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 93.918229] ------------[ cut here ]------------ [ 93.923007] kobject_add_internal failed for 7:199-fuseblk with -EEXIST, don't try to register things with the same name in the same directory. [ 93.936228] WARNING: CPU: 0 PID: 4555 at lib/kobject.c:238 kobject_add_internal+0x8e0/0xba0 [ 93.941587] IPVS: ftp: loaded support on port[0] = 21 [ 93.944709] Kernel panic - not syncing: panic_on_warn set ... [ 93.944709] [ 93.944720] CPU: 0 PID: 4555 Comm: syz-executor3 Not tainted 4.16.0+ #3 [ 93.944725] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 93.944728] Call Trace: [ 93.944740] dump_stack+0x1b9/0x294 [ 93.944749] ? dump_stack_print_info.cold.2+0x52/0x52 [ 93.944760] ? kobject_add_internal+0x820/0xba0 [ 93.944769] panic+0x22f/0x4de [ 93.944776] ? add_taint.cold.5+0x16/0x16 [ 93.944786] ? __warn.cold.8+0x148/0x1b3 [ 93.944797] ? __warn.cold.8+0x117/0x1b3 [ 94.006213] ? kobject_add_internal+0x8e0/0xba0 [ 94.010878] __warn.cold.8+0x163/0x1b3 [ 94.014751] ? kobject_add_internal+0x8e0/0xba0 [ 94.019434] report_bug+0x252/0x2d0 [ 94.023054] do_error_trap+0x1de/0x490 [ 94.026930] ? math_error+0x420/0x420 [ 94.030714] ? vprintk_default+0x28/0x30 [ 94.034758] ? vprintk_func+0x81/0xe7 [ 94.038550] ? printk+0x9e/0xba [ 94.041819] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 94.046645] do_invalid_op+0x1b/0x20 [ 94.050345] invalid_op+0x1b/0x40 [ 94.053793] RIP: 0010:kobject_add_internal+0x8e0/0xba0 [ 94.059060] RSP: 0018:ffff8801b29df250 EFLAGS: 00010286 [ 94.065032] RAX: 0000000000000082 RBX: ffff8801d8d2a390 RCX: ffffffff81822b04 [ 94.072295] RDX: 0000000000000000 RSI: ffffffff815fa5a1 RDI: 0000000000000001 [ 94.079549] RBP: ffff8801b29df348 R08: ffff8801d8e7e080 R09: ffffed003b604f90 [ 94.086800] R10: ffffed003b604f90 R11: ffff8801db027c87 R12: 00000000ffffffef [ 94.094054] R13: ffff8801d3747480 R14: 1ffff1003653be54 R15: ffff8801d9fc8f00 [ 94.101322] ? irq_work_queue+0x104/0x130 [ 94.105478] ? vprintk_func+0x81/0xe7 [ 94.109298] ? kobj_ns_type_registered+0x60/0x60 [ 94.114145] ? lock_downgrade+0x8e0/0x8e0 [ 94.118294] ? refcount_add_not_zero+0x320/0x320 [ 94.123315] ? kasan_check_read+0x11/0x20 [ 94.135899] kobject_add+0x13a/0x190 [ 94.139624] ? kset_create_and_add+0x190/0x190 [ 94.144207] ? mutex_unlock+0xd/0x10 [ 94.147902] ? __mutex_unlock_slowpath+0x180/0x8a0 [ 94.152839] device_add+0x3a5/0x16d0 [ 94.156558] ? device_private_init+0x230/0x230 [ 94.161127] ? kfree+0x1e9/0x260 [ 94.164475] ? kfree_const+0x5e/0x70 [ 94.168171] device_create_groups_vargs+0x1ff/0x270 [ 94.173271] device_create_vargs+0x46/0x60 [ 94.177523] bdi_register_va.part.10+0xbb/0x970 [ 94.182353] ? cgwb_kill+0x630/0x630 [ 94.186054] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 94.191582] ? bdi_init+0x416/0x510 [ 94.195210] ? wb_init+0x9e0/0x9e0 [ 94.198732] ? bdi_alloc_node+0x67/0xe0 [ 94.202687] ? bdi_alloc_node+0x67/0xe0 [ 94.206641] ? rcu_read_lock_sched_held+0x108/0x120 [ 94.211651] ? kmem_cache_alloc_node_trace+0x34e/0x770 [ 94.216927] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 94.222454] ? refcount_sub_and_test+0x212/0x330 [ 94.227203] bdi_register_va+0x68/0x80 [ 94.231077] super_setup_bdi_name+0x123/0x220 [ 94.235556] ? kill_block_super+0x100/0x100 [ 94.239887] ? kmem_cache_alloc_trace+0x616/0x780 [ 94.244744] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 94.249803] fuse_fill_super+0xe6e/0x1e20 [ 94.253960] ? fuse_get_root_inode+0x190/0x190 [ 94.258634] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 94.264175] ? vsnprintf+0x242/0x1b40 [ 94.267971] ? pointer+0xa20/0xa20 [ 94.271532] ? vsprintf+0x40/0x40 [ 94.274972] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 94.279973] ? set_blocksize+0x2c4/0x350 [ 94.284018] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 94.289558] mount_bdev+0x30c/0x3e0 [ 94.293166] ? fuse_get_root_inode+0x190/0x190 [ 94.297730] fuse_mount_blk+0x34/0x40 [ 94.301558] mount_fs+0xae/0x328 [ 94.304946] vfs_kern_mount.part.34+0xd4/0x4d0 [ 94.310231] ? may_umount+0xb0/0xb0 [ 94.313853] ? _raw_read_unlock+0x22/0x30 [ 94.317988] ? __get_fs_type+0x97/0xc0 [ 94.321859] do_mount+0x564/0x3070 [ 94.325397] ? do_raw_spin_unlock+0x9e/0x2e0 [ 94.329875] ? copy_mount_string+0x40/0x40 [ 94.334100] ? rcu_pm_notify+0xc0/0xc0 [ 94.337974] ? copy_mount_options+0x5f/0x380 [ 94.342365] ? rcu_read_lock_sched_held+0x108/0x120 [ 94.347363] ? kmem_cache_alloc_trace+0x616/0x780 [ 94.352190] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 94.357716] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 94.363253] ? copy_mount_options+0x285/0x380 [ 94.367819] ksys_mount+0x12d/0x140 [ 94.371428] SyS_mount+0x35/0x50 [ 94.374788] ? ksys_mount+0x140/0x140 [ 94.378573] do_syscall_64+0x29e/0x9d0 [ 94.382443] ? vmalloc_sync_all+0x30/0x30 [ 94.386572] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 94.391316] ? syscall_return_slowpath+0x5c0/0x5c0 [ 94.396227] ? syscall_return_slowpath+0x30f/0x5c0 [ 94.401155] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 94.406686] ? retint_user+0x18/0x18 [ 94.410385] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 94.415226] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 94.420411] RIP: 0033:0x455319 [ 94.423604] RSP: 002b:00007ffdac87b468 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 94.434124] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000455319 [ 94.441384] RDX: 00000000004b9c85 RSI: 0000000020000100 RDI: 0000000020000140 [ 94.448635] RBP: 0000000020000140 R08: 00007ffdac87b480 R09: 00524f5252450040 [ 94.455884] R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000000 [ 94.463133] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 94.471203] Dumping ftrace buffer: [ 94.474866] (ftrace buffer empty) [ 94.478562] Kernel Offset: disabled [ 94.482177] Rebooting in 86400 seconds..