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 '10.128.0.45' (ECDSA) to the list of known hosts. 2018/04/15 22:23:36 parsed 1 programs 2018/04/15 22:23:36 executed programs: 0 syzkaller login: [ 121.252303] IPVS: ftp: loaded support on port[0] = 21 [ 121.255791] IPVS: ftp: loaded support on port[0] = 21 [ 121.262188] IPVS: ftp: loaded support on port[0] = 21 [ 121.274319] IPVS: ftp: loaded support on port[0] = 21 [ 121.297547] IPVS: ftp: loaded support on port[0] = 21 [ 121.300209] IPVS: ftp: loaded support on port[0] = 21 [ 121.308010] IPVS: ftp: loaded support on port[0] = 21 [ 121.315494] IPVS: ftp: loaded support on port[0] = 21 [ 121.524437] IPVS: ftp: loaded support on port[0] = 21 [ 121.528088] IPVS: ftp: loaded support on port[0] = 21 [ 121.573395] IPVS: ftp: loaded support on port[0] = 21 [ 121.586432] IPVS: ftp: loaded support on port[0] = 21 [ 121.608217] IPVS: ftp: loaded support on port[0] = 21 [ 121.625277] IPVS: ftp: loaded support on port[0] = 21 [ 121.634276] IPVS: ftp: loaded support on port[0] = 21 [ 121.649451] IPVS: ftp: loaded support on port[0] = 21 [ 121.791067] IPVS: ftp: loaded support on port[0] = 21 [ 121.829553] IPVS: ftp: loaded support on port[0] = 21 [ 121.832292] IPVS: ftp: loaded support on port[0] = 21 [ 121.840955] sysfs: cannot create duplicate filename '/devices/virtual/bdi/7:199-fuseblk' [ 121.849408] CPU: 0 PID: 4589 Comm: syz-executor6 Not tainted 4.16.0+ #4 [ 121.856144] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 121.863882] IPVS: ftp: loaded support on port[0] = 21 [ 121.865566] Call Trace: [ 121.865594] dump_stack+0x1b9/0x294 [ 121.865607] ? dump_stack_print_info.cold.2+0x52/0x52 [ 121.882189] sysfs_warn_dup.cold.3+0x1c/0x2b [ 121.886583] sysfs_create_dir_ns+0x184/0x1d0 [ 121.890989] kobject_add_internal+0x353/0xba0 [ 121.895470] ? kobj_ns_type_registered+0x60/0x60 [ 121.900212] ? lock_downgrade+0x8e0/0x8e0 [ 121.904347] ? refcount_add_not_zero+0x320/0x320 [ 121.909088] ? kasan_check_read+0x11/0x20 [ 121.913221] kobject_add+0x13a/0x190 [ 121.916918] ? kset_create_and_add+0x190/0x190 [ 121.921487] ? mutex_unlock+0xd/0x10 [ 121.925183] ? __mutex_unlock_slowpath+0x180/0x8a0 [ 121.930098] device_add+0x3a5/0x16d0 [ 121.933802] ? device_private_init+0x230/0x230 [ 121.938366] ? kfree+0x1e9/0x260 [ 121.941717] ? kfree_const+0x5e/0x70 [ 121.945414] device_create_groups_vargs+0x1ff/0x270 [ 121.950413] device_create_vargs+0x46/0x60 [ 121.954632] bdi_register_va.part.10+0xbb/0x970 [ 121.959287] ? cgwb_kill+0x630/0x630 [ 121.962989] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 121.968541] ? bdi_init+0x416/0x510 [ 121.972151] ? wb_init+0x9e0/0x9e0 [ 121.975675] ? bdi_alloc_node+0x67/0xe0 [ 121.979655] ? bdi_alloc_node+0x67/0xe0 [ 121.983614] ? rcu_read_lock_sched_held+0x108/0x120 [ 121.988613] ? kmem_cache_alloc_node_trace+0x34e/0x770 [ 121.993879] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 121.999400] ? refcount_sub_and_test+0x212/0x330 [ 122.004139] bdi_register_va+0x68/0x80 [ 122.008012] super_setup_bdi_name+0x123/0x220 [ 122.012491] ? kill_block_super+0x100/0x100 [ 122.016794] ? kmem_cache_alloc_trace+0x616/0x780 [ 122.021619] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 122.026624] fuse_fill_super+0xe6e/0x1e20 [ 122.030760] ? fuse_get_root_inode+0x190/0x190 [ 122.035328] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 122.040846] ? vsnprintf+0x242/0x1b40 [ 122.044631] ? pointer+0xa20/0xa20 [ 122.048156] ? vsprintf+0x40/0x40 [ 122.051592] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 122.056589] ? set_blocksize+0x2c4/0x350 [ 122.060633] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 122.066154] mount_bdev+0x30c/0x3e0 [ 122.069772] ? fuse_get_root_inode+0x190/0x190 [ 122.074337] fuse_mount_blk+0x34/0x40 [ 122.078119] mount_fs+0xae/0x328 [ 122.081470] vfs_kern_mount.part.34+0xd4/0x4d0 [ 122.086038] ? may_umount+0xb0/0xb0 [ 122.089656] ? _raw_read_unlock+0x22/0x30 [ 122.093788] ? __get_fs_type+0x97/0xc0 [ 122.097753] do_mount+0x564/0x3070 [ 122.101283] ? do_raw_spin_unlock+0x9e/0x2e0 [ 122.105675] ? copy_mount_string+0x40/0x40 [ 122.110055] ? rcu_pm_notify+0xc0/0xc0 [ 122.113931] ? copy_mount_options+0x5f/0x380 [ 122.118320] ? rcu_read_lock_sched_held+0x108/0x120 [ 122.123319] ? kmem_cache_alloc_trace+0x616/0x780 [ 122.128241] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 122.133766] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 122.139284] ? copy_mount_options+0x285/0x380 [ 122.143762] ksys_mount+0x12d/0x140 [ 122.147371] SyS_mount+0x35/0x50 [ 122.150715] ? ksys_mount+0x140/0x140 [ 122.154506] do_syscall_64+0x29e/0x9d0 [ 122.158372] ? vmalloc_sync_all+0x30/0x30 [ 122.162501] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 122.167238] ? syscall_return_slowpath+0x5c0/0x5c0 [ 122.172151] ? syscall_return_slowpath+0x30f/0x5c0 [ 122.177076] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 122.182595] ? retint_user+0x18/0x18 [ 122.186293] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 122.191120] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 122.196290] RIP: 0033:0x455319 [ 122.199458] RSP: 002b:00007ffdd85445d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 122.207155] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000455319 [ 122.214405] RDX: 00000000004b9c85 RSI: 0000000020000000 RDI: 0000000020000040 [ 122.221662] RBP: 0000000020000040 R08: 00007ffdd85445f0 R09: 00524f5252450040 [ 122.228911] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 122.236159] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 122.243482] ------------[ cut here ]------------ [ 122.248246] kobject_add_internal failed for 7:199-fuseblk with -EEXIST, don't try to register things with the same name in the same directory. [ 122.257268] IPVS: ftp: loaded support on port[0] = 21 [ 122.261441] WARNING: CPU: 0 PID: 4589 at lib/kobject.c:238 kobject_add_internal+0x8e0/0xba0 [ 122.274966] Kernel panic - not syncing: panic_on_warn set ... [ 122.274966] [ 122.282313] CPU: 0 PID: 4589 Comm: syz-executor6 Not tainted 4.16.0+ #4 [ 122.289042] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 122.298374] Call Trace: [ 122.300942] dump_stack+0x1b9/0x294 [ 122.304551] ? dump_stack_print_info.cold.2+0x52/0x52 [ 122.309727] ? kobject_add_internal+0x820/0xba0 [ 122.314385] panic+0x22f/0x4de [ 122.317558] ? add_taint.cold.5+0x16/0x16 [ 122.321700] ? __warn.cold.8+0x148/0x1b3 [ 122.325738] ? __warn.cold.8+0x117/0x1b3 [ 122.329780] ? kobject_add_internal+0x8e0/0xba0 [ 122.334437] __warn.cold.8+0x163/0x1b3 [ 122.338306] ? kobject_add_internal+0x8e0/0xba0 [ 122.342955] report_bug+0x252/0x2d0 [ 122.346565] do_error_trap+0x1de/0x490 [ 122.350433] ? math_error+0x420/0x420 [ 122.354223] ? vprintk_default+0x28/0x30 [ 122.358271] ? vprintk_func+0x81/0xe7 [ 122.362053] ? printk+0x9e/0xba [ 122.365322] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 122.370159] do_invalid_op+0x1b/0x20 [ 122.373855] invalid_op+0x1b/0x40 [ 122.377289] RIP: 0010:kobject_add_internal+0x8e0/0xba0 [ 122.382543] RSP: 0018:ffff8801d96df250 EFLAGS: 00010286 [ 122.387889] RAX: 0000000000000082 RBX: ffff8801a90fd110 RCX: ffffffff815f5b3d [ 122.395139] RDX: 0000000000000000 RSI: ffffffff815fa7f1 RDI: ffff8801d96dedb0 [ 122.402393] RBP: ffff8801d96df348 R08: ffff8801cc11c040 R09: 0000000000000006 [ 122.409642] R10: ffff8801cc11c040 R11: 0000000000000000 R12: 00000000ffffffef [ 122.416890] R13: ffff8801d314af00 R14: 1ffff1003b2dbe54 R15: ffff8801d9fc8f00 [ 122.424148] ? console_unlock+0x8ad/0x1100 [ 122.428361] ? vprintk_func+0x81/0xe7 [ 122.432147] ? kobj_ns_type_registered+0x60/0x60 [ 122.436883] ? lock_downgrade+0x8e0/0x8e0 [ 122.441011] ? refcount_add_not_zero+0x320/0x320 [ 122.445746] ? kasan_check_read+0x11/0x20 [ 122.449883] kobject_add+0x13a/0x190 [ 122.453574] ? kset_create_and_add+0x190/0x190 [ 122.458138] ? mutex_unlock+0xd/0x10 [ 122.461830] ? __mutex_unlock_slowpath+0x180/0x8a0 [ 122.466739] device_add+0x3a5/0x16d0 [ 122.470436] ? device_private_init+0x230/0x230 [ 122.475003] ? kfree+0x1e9/0x260 [ 122.478351] ? kfree_const+0x5e/0x70 [ 122.482045] device_create_groups_vargs+0x1ff/0x270 [ 122.487042] device_create_vargs+0x46/0x60 [ 122.491259] bdi_register_va.part.10+0xbb/0x970 [ 122.495909] ? cgwb_kill+0x630/0x630 [ 122.499613] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 122.505129] ? bdi_init+0x416/0x510 [ 122.508734] ? wb_init+0x9e0/0x9e0 [ 122.512253] ? bdi_alloc_node+0x67/0xe0 [ 122.516205] ? bdi_alloc_node+0x67/0xe0 [ 122.520169] ? rcu_read_lock_sched_held+0x108/0x120 [ 122.525163] ? kmem_cache_alloc_node_trace+0x34e/0x770 [ 122.530421] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 122.535938] ? refcount_sub_and_test+0x212/0x330 [ 122.540675] bdi_register_va+0x68/0x80 [ 122.544545] super_setup_bdi_name+0x123/0x220 [ 122.549021] ? kill_block_super+0x100/0x100 [ 122.553330] ? kmem_cache_alloc_trace+0x616/0x780 [ 122.558148] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 122.563149] fuse_fill_super+0xe6e/0x1e20 [ 122.567280] ? fuse_get_root_inode+0x190/0x190 [ 122.571842] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 122.577365] ? vsnprintf+0x242/0x1b40 [ 122.581148] ? pointer+0xa20/0xa20 [ 122.584476] IPVS: ftp: loaded support on port[0] = 21 [ 122.584673] ? vsprintf+0x40/0x40 [ 122.593311] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 122.598314] ? set_blocksize+0x2c4/0x350 [ 122.602359] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 122.607879] mount_bdev+0x30c/0x3e0 [ 122.611488] ? fuse_get_root_inode+0x190/0x190 [ 122.616051] fuse_mount_blk+0x34/0x40 [ 122.619833] mount_fs+0xae/0x328 [ 122.623182] vfs_kern_mount.part.34+0xd4/0x4d0 [ 122.627746] ? may_umount+0xb0/0xb0 [ 122.631352] ? _raw_read_unlock+0x22/0x30 [ 122.635481] ? __get_fs_type+0x97/0xc0 [ 122.639353] do_mount+0x564/0x3070 [ 122.642876] ? do_raw_spin_unlock+0x9e/0x2e0 [ 122.647273] ? copy_mount_string+0x40/0x40 [ 122.651487] ? rcu_pm_notify+0xc0/0xc0 [ 122.655358] ? copy_mount_options+0x5f/0x380 [ 122.659743] ? rcu_read_lock_sched_held+0x108/0x120 [ 122.664738] ? kmem_cache_alloc_trace+0x616/0x780 [ 122.669560] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 122.675079] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 122.680603] ? copy_mount_options+0x285/0x380 [ 122.685076] ksys_mount+0x12d/0x140 [ 122.688688] SyS_mount+0x35/0x50 [ 122.692031] ? ksys_mount+0x140/0x140 [ 122.695811] do_syscall_64+0x29e/0x9d0 [ 122.699685] ? vmalloc_sync_all+0x30/0x30 [ 122.703898] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 122.708631] ? syscall_return_slowpath+0x5c0/0x5c0 [ 122.713549] ? syscall_return_slowpath+0x30f/0x5c0 [ 122.718458] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 122.723972] ? retint_user+0x18/0x18 [ 122.727667] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 122.732493] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 122.737662] RIP: 0033:0x455319 [ 122.740828] RSP: 002b:00007ffdd85445d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 122.748699] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000455319 [ 122.755953] RDX: 00000000004b9c85 RSI: 0000000020000000 RDI: 0000000020000040 [ 122.763223] RBP: 0000000020000040 R08: 00007ffdd85445f0 R09: 00524f5252450040 [ 122.770482] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 122.777728] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 122.785554] Dumping ftrace buffer: [ 122.789208] (ftrace buffer empty) [ 122.792900] Kernel Offset: disabled [ 122.796511] Rebooting in 86400 seconds..