[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.107049] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.882589] random: sshd: uninitialized urandom read (32 bytes read) [ 24.268567] random: sshd: uninitialized urandom read (32 bytes read) [ 24.988234] random: sshd: uninitialized urandom read (32 bytes read) [ 37.105746] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.46' (ECDSA) to the list of known hosts. [ 42.579747] random: sshd: uninitialized urandom read (32 bytes read) 2018/04/26 10:07:24 parsed 1 programs 2018/04/26 10:07:24 executed programs: 0 [ 43.059390] IPVS: ftp: loaded support on port[0] = 21 [ 43.067735] IPVS: ftp: loaded support on port[0] = 21 [ 43.077586] IPVS: ftp: loaded support on port[0] = 21 [ 43.079442] IPVS: ftp: loaded support on port[0] = 21 [ 43.101860] IPVS: ftp: loaded support on port[0] = 21 [ 43.123717] IPVS: ftp: loaded support on port[0] = 21 [ 43.124337] IPVS: ftp: loaded support on port[0] = 21 [ 43.147424] IPVS: ftp: loaded support on port[0] = 21 [ 43.391332] IPVS: ftp: loaded support on port[0] = 21 [ 43.398445] IPVS: ftp: loaded support on port[0] = 21 [ 43.404851] IPVS: ftp: loaded support on port[0] = 21 [ 43.410374] IPVS: ftp: loaded support on port[0] = 21 [ 43.423401] IPVS: ftp: loaded support on port[0] = 21 [ 43.433088] IPVS: ftp: loaded support on port[0] = 21 [ 43.455833] IPVS: ftp: loaded support on port[0] = 21 [ 43.463570] IPVS: ftp: loaded support on port[0] = 21 [ 43.680856] IPVS: ftp: loaded support on port[0] = 21 [ 43.687809] IPVS: ftp: loaded support on port[0] = 21 [ 43.711311] IPVS: ftp: loaded support on port[0] = 21 [ 43.712340] IPVS: ftp: loaded support on port[0] = 21 [ 43.732649] IPVS: ftp: loaded support on port[0] = 21 [ 43.762155] IPVS: ftp: loaded support on port[0] = 21 [ 43.771325] IPVS: ftp: loaded support on port[0] = 21 [ 43.792569] IPVS: ftp: loaded support on port[0] = 21 [ 43.826325] IPVS: ftp: loaded support on port[0] = 21 [ 43.942287] IPVS: ftp: loaded support on port[0] = 21 [ 43.997948] IPVS: ftp: loaded support on port[0] = 21 [ 44.027784] IPVS: ftp: loaded support on port[0] = 21 [ 44.069384] IPVS: ftp: loaded support on port[0] = 21 [ 44.080755] IPVS: ftp: loaded support on port[0] = 21 [ 44.091651] IPVS: ftp: loaded support on port[0] = 21 [ 44.103517] IPVS: ftp: loaded support on port[0] = 21 [ 44.106569] IPVS: ftp: loaded support on port[0] = 21 [ 44.164692] IPVS: ftp: loaded support on port[0] = 21 [ 44.298655] sysfs: cannot create duplicate filename '/devices/virtual/bdi/7:199-fuseblk' [ 44.307401] CPU: 0 PID: 4677 Comm: syz-executor7 Not tainted 4.17.0-rc2+ #17 [ 44.314571] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.323912] Call Trace: [ 44.326490] dump_stack+0x1b9/0x294 [ 44.330115] ? dump_stack_print_info.cold.2+0x52/0x52 [ 44.335291] ? trace_hardirqs_on+0xd/0x10 [ 44.339785] sysfs_warn_dup.cold.3+0x1c/0x2b [ 44.343620] IPVS: ftp: loaded support on port[0] = 21 [ 44.344184] sysfs_create_dir_ns+0x184/0x1d0 [ 44.344204] kobject_add_internal+0x353/0xba0 [ 44.349630] IPVS: ftp: loaded support on port[0] = 21 [ 44.353792] ? kobj_ns_type_registered+0x60/0x60 [ 44.353802] ? lock_downgrade+0x8e0/0x8e0 [ 44.353814] ? refcount_add_not_zero+0x320/0x320 [ 44.353825] ? kasan_check_read+0x11/0x20 [ 44.353838] kobject_add+0x13a/0x190 [ 44.384864] ? kset_create_and_add+0x190/0x190 [ 44.389432] ? mutex_unlock+0xd/0x10 [ 44.393144] ? __mutex_unlock_slowpath+0x180/0x8a0 [ 44.398058] device_add+0x3a5/0x16d0 [ 44.401775] ? device_private_init+0x230/0x230 [ 44.406346] ? kfree+0x1e9/0x260 [ 44.409719] ? kfree_const+0x5e/0x70 [ 44.413591] device_create_groups_vargs+0x1ff/0x270 [ 44.418592] device_create_vargs+0x46/0x60 [ 44.422823] bdi_register_va.part.10+0xbb/0x970 [ 44.427485] ? cgwb_kill+0x630/0x630 [ 44.431183] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 44.436706] ? bdi_init+0x416/0x510 [ 44.440312] ? wb_init+0x9e0/0x9e0 [ 44.443848] ? bdi_alloc_node+0x67/0xe0 [ 44.447813] ? bdi_alloc_node+0x67/0xe0 [ 44.451768] ? rcu_read_lock_sched_held+0x108/0x120 [ 44.457207] ? kmem_cache_alloc_node_trace+0x34e/0x770 [ 44.462480] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 44.468001] bdi_register_va+0x68/0x80 [ 44.471885] super_setup_bdi_name+0x123/0x220 [ 44.476361] ? kill_block_super+0x100/0x100 [ 44.480664] ? kmem_cache_alloc_trace+0x616/0x780 [ 44.485496] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 44.490502] fuse_fill_super+0xe6e/0x1e20 [ 44.494634] ? fuse_get_root_inode+0x190/0x190 [ 44.499217] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 44.504736] ? vsnprintf+0x242/0x1b40 [ 44.508523] ? pointer+0xa20/0xa20 [ 44.512071] ? vsprintf+0x40/0x40 [ 44.515515] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 44.520514] ? set_blocksize+0x2c4/0x350 [ 44.525347] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 44.530871] mount_bdev+0x30c/0x3e0 [ 44.534496] ? fuse_get_root_inode+0x190/0x190 [ 44.539153] fuse_mount_blk+0x34/0x40 [ 44.542940] mount_fs+0xae/0x328 [ 44.546293] vfs_kern_mount.part.34+0xd4/0x4d0 [ 44.550867] ? may_umount+0xb0/0xb0 [ 44.554479] ? _raw_read_unlock+0x22/0x30 [ 44.558607] ? __get_fs_type+0x97/0xc0 [ 44.562522] do_mount+0x564/0x3070 [ 44.566045] ? do_raw_spin_unlock+0x9e/0x2e0 [ 44.570435] ? copy_mount_string+0x40/0x40 [ 44.574649] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 44.579644] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 44.584383] ? retint_kernel+0x10/0x10 [ 44.588257] ? copy_mount_options+0x1e3/0x380 [ 44.592741] ? copy_mount_options+0x1f0/0x380 [ 44.597217] ? copy_mount_options+0x1fa/0x380 [ 44.601697] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 44.607216] ? copy_mount_options+0x285/0x380 [ 44.611713] ksys_mount+0x12d/0x140 [ 44.615333] __x64_sys_mount+0xbe/0x150 [ 44.619287] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 44.624288] do_syscall_64+0x1b1/0x800 [ 44.628158] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 44.632987] ? syscall_return_slowpath+0x5c0/0x5c0 [ 44.637902] ? syscall_return_slowpath+0x30f/0x5c0 [ 44.642907] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 44.648435] ? retint_user+0x18/0x18 [ 44.652137] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.656986] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 44.662160] RIP: 0033:0x455389 [ 44.665334] RSP: 002b:00007ffe17a81208 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 44.673031] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000455389 [ 44.680280] RDX: 00000000004b9d05 RSI: 0000000020000080 RDI: 00000000200000c0 [ 44.687530] RBP: 00000000200000c0 R08: 00007ffe17a81220 R09: 00524f5252450040 [ 44.694791] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 44.702042] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 44.709417] ------------[ cut here ]------------ [ 44.714188] kobject_add_internal failed for 7:199-fuseblk with -EEXIST, don't try to register things with the same name in the same directory. [ 44.727424] WARNING: CPU: 0 PID: 4677 at lib/kobject.c:238 kobject_add_internal+0x8e0/0xba0 [ 44.735904] Kernel panic - not syncing: panic_on_warn set ... [ 44.735904] [ 44.743253] CPU: 0 PID: 4677 Comm: syz-executor7 Not tainted 4.17.0-rc2+ #17 [ 44.750417] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.754422] IPVS: ftp: loaded support on port[0] = 21 [ 44.759749] Call Trace: [ 44.759766] dump_stack+0x1b9/0x294 [ 44.759777] ? dump_stack_print_info.cold.2+0x52/0x52 [ 44.759788] ? kobject_add_internal+0x8c0/0xba0 [ 44.759798] panic+0x22f/0x4de [ 44.759813] ? add_taint.cold.5+0x16/0x16 [ 44.788271] ? __warn.cold.8+0x148/0x1b3 [ 44.792312] ? __warn.cold.8+0x117/0x1b3 [ 44.796368] ? kobject_add_internal+0x8e0/0xba0 [ 44.801019] __warn.cold.8+0x163/0x1b3 [ 44.804892] ? kobject_add_internal+0x8e0/0xba0 [ 44.809544] report_bug+0x252/0x2d0 [ 44.813152] do_error_trap+0x1de/0x490 [ 44.817020] ? math_error+0x420/0x420 [ 44.821518] ? vprintk_default+0x28/0x30 [ 44.825573] ? vprintk_func+0x81/0xe7 [ 44.829369] ? printk+0x9e/0xba [ 44.832644] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.837471] do_invalid_op+0x1b/0x20 [ 44.841174] invalid_op+0x14/0x20 [ 44.844614] RIP: 0010:kobject_add_internal+0x8e0/0xba0 [ 44.849867] RSP: 0018:ffff8801b6217270 EFLAGS: 00010286 [ 44.855223] RAX: 0000000000000082 RBX: ffff8801d4a36c50 RCX: ffffffff8160a82d [ 44.862474] RDX: 0000000000000000 RSI: ffffffff8160f4e1 RDI: ffff8801b6216dd0 [ 44.869727] RBP: ffff8801b6217368 R08: ffff8801ad0640c0 R09: 0000000000000006 [ 44.876984] R10: ffff8801ad0640c0 R11: 0000000000000000 R12: 00000000ffffffef [ 44.884238] R13: ffff8801d2d97d00 R14: 1ffff10036c42e58 R15: ffff8801d9bcaf00 [ 44.891505] ? console_unlock+0x8ad/0x1100 [ 44.895739] ? vprintk_func+0x81/0xe7 [ 44.899529] ? kobj_ns_type_registered+0x60/0x60 [ 44.904280] ? lock_downgrade+0x8e0/0x8e0 [ 44.908413] ? refcount_add_not_zero+0x320/0x320 [ 44.913158] ? kasan_check_read+0x11/0x20 [ 44.917302] kobject_add+0x13a/0x190 [ 44.921010] ? kset_create_and_add+0x190/0x190 [ 44.925586] ? mutex_unlock+0xd/0x10 [ 44.929280] ? __mutex_unlock_slowpath+0x180/0x8a0 [ 44.934198] device_add+0x3a5/0x16d0 [ 44.937899] ? device_private_init+0x230/0x230 [ 44.942463] ? kfree+0x1e9/0x260 [ 44.945813] ? kfree_const+0x5e/0x70 [ 44.949512] device_create_groups_vargs+0x1ff/0x270 [ 44.954513] device_create_vargs+0x46/0x60 [ 44.958733] bdi_register_va.part.10+0xbb/0x970 [ 44.963386] ? cgwb_kill+0x630/0x630 [ 44.967085] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 44.972604] ? bdi_init+0x416/0x510 [ 44.976223] ? wb_init+0x9e0/0x9e0 [ 44.979745] ? bdi_alloc_node+0x67/0xe0 [ 44.983699] ? bdi_alloc_node+0x67/0xe0 [ 44.987654] ? rcu_read_lock_sched_held+0x108/0x120 [ 44.992652] ? kmem_cache_alloc_node_trace+0x34e/0x770 [ 44.997916] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.003437] bdi_register_va+0x68/0x80 [ 45.007311] super_setup_bdi_name+0x123/0x220 [ 45.011799] ? kill_block_super+0x100/0x100 [ 45.016107] ? kmem_cache_alloc_trace+0x616/0x780 [ 45.020933] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 45.025937] fuse_fill_super+0xe6e/0x1e20 [ 45.030072] ? fuse_get_root_inode+0x190/0x190 [ 45.034636] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 45.040158] ? vsnprintf+0x242/0x1b40 [ 45.043961] ? pointer+0xa20/0xa20 [ 45.047505] ? vsprintf+0x40/0x40 [ 45.050946] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 45.055967] ? set_blocksize+0x2c4/0x350 [ 45.060044] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.065579] mount_bdev+0x30c/0x3e0 [ 45.069197] ? fuse_get_root_inode+0x190/0x190 [ 45.073780] fuse_mount_blk+0x34/0x40 [ 45.077579] mount_fs+0xae/0x328 [ 45.080935] vfs_kern_mount.part.34+0xd4/0x4d0 [ 45.085505] ? may_umount+0xb0/0xb0 [ 45.089125] ? _raw_read_unlock+0x22/0x30 [ 45.093268] ? __get_fs_type+0x97/0xc0 [ 45.097145] do_mount+0x564/0x3070 [ 45.100675] ? do_raw_spin_unlock+0x9e/0x2e0 [ 45.105071] ? copy_mount_string+0x40/0x40 [ 45.109293] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 45.114301] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 45.119057] ? retint_kernel+0x10/0x10 [ 45.122943] ? copy_mount_options+0x1e3/0x380 [ 45.127423] ? copy_mount_options+0x1f0/0x380 [ 45.131939] ? copy_mount_options+0x1fa/0x380 [ 45.136430] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.141975] ? copy_mount_options+0x285/0x380 [ 45.146458] ksys_mount+0x12d/0x140 [ 45.150082] __x64_sys_mount+0xbe/0x150 [ 45.154058] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 45.159063] do_syscall_64+0x1b1/0x800 [ 45.162950] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 45.167868] ? syscall_return_slowpath+0x5c0/0x5c0 [ 45.172782] ? syscall_return_slowpath+0x30f/0x5c0 [ 45.177704] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.183241] ? retint_user+0x18/0x18 [ 45.186950] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 45.191809] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.196995] RIP: 0033:0x455389 [ 45.200176] RSP: 002b:00007ffe17a81208 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 45.207872] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000455389 [ 45.215130] RDX: 00000000004b9d05 RSI: 0000000020000080 RDI: 00000000200000c0 [ 45.222401] RBP: 00000000200000c0 R08: 00007ffe17a81220 R09: 00524f5252450040 [ 45.229672] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 45.236945] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 45.245047] Dumping ftrace buffer: [ 45.248804] (ftrace buffer empty) [ 45.252518] Kernel Offset: disabled [ 45.256146] Rebooting in 86400 seconds..