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 '10.128.0.4' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 24.133556] gfs2: can't find protocol dlm [ 24.136776] sysfs: cannot create duplicate filename '/fs/gfs2/_dev_net_tun' [ 24.144955] CPU: 1 PID: 4475 Comm: syzkaller762031 Not tainted 4.16.0+ #10 [ 24.151952] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.154202] sysfs: cannot create duplicate filename '/fs/gfs2/_dev_net_tun' [ 24.161765] Call Trace: [ 24.161779] dump_stack+0x194/0x24d [ 24.161792] ? arch_local_irq_restore+0x53/0x53 [ 24.179661] ? trace_hardirqs_on+0xd/0x10 [ 24.183792] ? sysfs_warn_dup+0x6c/0xa0 [ 24.187752] sysfs_warn_dup+0x83/0xa0 [ 24.191531] sysfs_create_dir_ns+0x178/0x1d0 [ 24.195920] kobject_add_internal+0x335/0xbc0 [ 24.200395] ? kobj_ns_type_registered+0x50/0x50 [ 24.205131] ? kfree_const+0x31/0x40 [ 24.208830] ? rcu_read_lock_sched_held+0x108/0x120 [ 24.213827] ? kfree+0x1f6/0x260 [ 24.217172] ? kfree_const+0x36/0x40 [ 24.220867] kobject_init_and_add+0xf9/0x150 [ 24.225255] ? kset_create_and_add+0x170/0x170 [ 24.229819] ? vsnprintf+0x1ed/0x1900 [ 24.233606] gfs2_sys_fs_add+0x1ff/0x580 [ 24.237645] ? recover_store+0x160/0x160 [ 24.241688] ? snprintf+0xc0/0xf0 [ 24.245120] ? vsprintf+0x40/0x40 [ 24.248559] ? set_blocksize+0x1f1/0x260 [ 24.252602] ? memcpy+0x45/0x50 [ 24.255869] fill_super+0x86f/0x1d70 [ 24.259566] ? vsnprintf+0x1ed/0x1900 [ 24.263349] ? gfs2_online_uevent+0x2a0/0x2a0 [ 24.267825] ? memcpy+0x45/0x50 [ 24.271084] ? match_strlcpy+0xbc/0xf0 [ 24.274955] ? snprintf+0xc0/0xf0 [ 24.278388] ? vsprintf+0x40/0x40 [ 24.281826] ? ns_capable_common+0xcf/0x160 [ 24.286127] ? set_blocksize+0x1f1/0x260 [ 24.290171] gfs2_mount+0x587/0x6e0 [ 24.293778] ? gfs2_mount+0x587/0x6e0 [ 24.297561] ? fill_super+0x1d70/0x1d70 [ 24.301531] mount_fs+0x66/0x2d0 [ 24.304880] vfs_kern_mount.part.26+0xc6/0x4a0 [ 24.309442] ? may_umount+0xa0/0xa0 [ 24.313050] ? _raw_read_unlock+0x22/0x30 [ 24.317180] ? __get_fs_type+0x8a/0xc0 [ 24.321049] do_mount+0xea4/0x2bb0 [ 24.324577] ? copy_mount_string+0x40/0x40 [ 24.328790] ? rcu_pm_notify+0xc0/0xc0 [ 24.332666] ? copy_mount_options+0x5f/0x2e0 [ 24.337053] ? rcu_read_lock_sched_held+0x108/0x120 [ 24.342050] ? kmem_cache_alloc_trace+0x459/0x740 [ 24.346876] ? kasan_check_write+0x14/0x20 [ 24.351096] ? copy_mount_options+0x1f7/0x2e0 [ 24.355571] SyS_mount+0xab/0x120 [ 24.359001] ? copy_mnt_ns+0xb30/0xb30 [ 24.362871] do_syscall_64+0x281/0x940 [ 24.366741] ? vmalloc_sync_all+0x30/0x30 [ 24.370870] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 24.375605] ? syscall_return_slowpath+0x550/0x550 [ 24.380514] ? syscall_return_slowpath+0x2ac/0x550 [ 24.385421] ? prepare_exit_to_usermode+0x350/0x350 [ 24.390417] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 24.395762] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 24.400589] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 24.405756] RIP: 0033:0x44313a [ 24.408924] RSP: 002b:00007fff66c99ba8 EFLAGS: 00000217 ORIG_RAX: 00000000000000a5 [ 24.416610] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000044313a [ 24.423861] RDX: 0000000020001880 RSI: 00000000200018c0 RDI: 00007fff66c99bc0 [ 24.431108] RBP: 00000000006cb018 R08: 0000000020001ec0 R09: 000000000000000a [ 24.438356] R10: 0000000000000006 R11: 0000000000000217 R12: 6c6261746b636f6c [ 24.445602] R13: 746f72706b636f6c R14: 0030656c69662f2e R15: 0000000000000004 [ 24.452864] CPU: 0 PID: 4476 Comm: syzkaller762031 Not tainted 4.16.0+ #10 [ 24.452936] ------------[ cut here ]------------ [ 24.459859] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.459862] Call Trace: [ 24.459873] dump_stack+0x194/0x24d [ 24.459883] ? arch_local_irq_restore+0x53/0x53 [ 24.459893] ? trace_hardirqs_on+0xd/0x10 [ 24.464636] kobject_add_internal failed for _dev_net_tun with -EEXIST, don't try to register things with the same name in the same directory. [ 24.473946] ? sysfs_warn_dup+0x6c/0xa0 [ 24.473957] sysfs_warn_dup+0x83/0xa0 [ 24.473965] sysfs_create_dir_ns+0x178/0x1d0 [ 24.473973] kobject_add_internal+0x335/0xbc0 [ 24.476743] WARNING: CPU: 1 PID: 4475 at lib/kobject.c:238 kobject_add_internal+0x8d4/0xbc0 [ 24.480127] ? kobj_ns_type_registered+0x50/0x50 [ 24.484758] Kernel panic - not syncing: panic_on_warn set ... [ 24.484758] [ 24.488878] ? kfree_const+0x31/0x40 [ 24.542409] ? rcu_read_lock_sched_held+0x108/0x120 [ 24.547404] ? kfree+0x1f6/0x260 [ 24.550750] ? kfree_const+0x36/0x40 [ 24.554441] kobject_init_and_add+0xf9/0x150 [ 24.558828] ? kset_create_and_add+0x170/0x170 [ 24.563394] ? vsnprintf+0x1ed/0x1900 [ 24.567177] gfs2_sys_fs_add+0x1ff/0x580 [ 24.571213] ? recover_store+0x160/0x160 [ 24.575249] ? snprintf+0xc0/0xf0 [ 24.578682] ? vsprintf+0x40/0x40 [ 24.582112] ? set_blocksize+0x1f1/0x260 [ 24.586152] ? memcpy+0x45/0x50 [ 24.589412] fill_super+0x86f/0x1d70 [ 24.593101] ? vsnprintf+0x1ed/0x1900 [ 24.596881] ? gfs2_online_uevent+0x2a0/0x2a0 [ 24.601351] ? memcpy+0x45/0x50 [ 24.604608] ? match_strlcpy+0xbc/0xf0 [ 24.608478] ? snprintf+0xc0/0xf0 [ 24.611909] ? vsprintf+0x40/0x40 [ 24.615340] ? ns_capable_common+0xcf/0x160 [ 24.619640] ? set_blocksize+0x1f1/0x260 [ 24.623684] gfs2_mount+0x587/0x6e0 [ 24.627290] ? gfs2_mount+0x587/0x6e0 [ 24.631071] ? fill_super+0x1d70/0x1d70 [ 24.635041] mount_fs+0x66/0x2d0 [ 24.638386] vfs_kern_mount.part.26+0xc6/0x4a0 [ 24.642947] ? may_umount+0xa0/0xa0 [ 24.646553] ? _raw_read_unlock+0x22/0x30 [ 24.650678] ? __get_fs_type+0x8a/0xc0 [ 24.654547] do_mount+0xea4/0x2bb0 [ 24.658069] ? copy_mount_string+0x40/0x40 [ 24.662286] ? rcu_pm_notify+0xc0/0xc0 [ 24.666155] ? copy_mount_options+0x5f/0x2e0 [ 24.670540] ? rcu_read_lock_sched_held+0x108/0x120 [ 24.675534] ? kmem_cache_alloc_trace+0x459/0x740 [ 24.680353] ? kasan_check_write+0x14/0x20 [ 24.684568] ? copy_mount_options+0x1f7/0x2e0 [ 24.689045] SyS_mount+0xab/0x120 [ 24.692475] ? copy_mnt_ns+0xb30/0xb30 [ 24.696340] do_syscall_64+0x281/0x940 [ 24.700207] ? vmalloc_sync_all+0x30/0x30 [ 24.704335] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 24.709069] ? syscall_return_slowpath+0x550/0x550 [ 24.713974] ? syscall_return_slowpath+0x2ac/0x550 [ 24.718880] ? prepare_exit_to_usermode+0x350/0x350 [ 24.723876] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 24.729217] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 24.734042] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 24.739206] RIP: 0033:0x44313a [ 24.742373] RSP: 002b:00007fff66c99ba8 EFLAGS: 00000217 ORIG_RAX: 00000000000000a5 [ 24.750057] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000044313a [ 24.757307] RDX: 0000000020001880 RSI: 00000000200018c0 RDI: 00007fff66c99bc0 [ 24.764555] RBP: 00000000006cb018 R08: 0000000020001ec0 R09: 000000000000000a [ 24.771802] R10: 0000000000000006 R11: 0000000000000217 R12: 6c6261746b636f6c [ 24.779048] R13: 746f72706b636f6c R14: 0030656c69662f2e R15: 0000000000000004 [ 24.786309] CPU: 1 PID: 4475 Comm: syzkaller762031 Not tainted 4.16.0+ #10 [ 24.786620] ------------[ cut here ]------------ [ 24.793303] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.793306] Call Trace: [ 24.793318] dump_stack+0x194/0x24d [ 24.793327] ? arch_local_irq_restore+0x53/0x53 [ 24.793338] ? vsnprintf+0x1ed/0x1900 [ 24.798071] kobject_add_internal failed for _dev_net_tun with -EEXIST, don't try to register things with the same name in the same directory. [ 24.807387] panic+0x1e4/0x41c [ 24.807395] ? refcount_error_report+0x214/0x214 [ 24.807403] ? show_regs_print_info+0x18/0x18 [ 24.810172] WARNING: CPU: 0 PID: 4476 at lib/kobject.c:238 kobject_add_internal+0x8d4/0xbc0 [ 24.813552] ? vprintk_emit+0xa5f/0xb90 [ 24.818185] Modules linked in: [ 24.821959] ? __warn+0x1c1/0x200 [ 24.834754] CPU: 0 PID: 4476 Comm: syzkaller762031 Not tainted 4.16.0+ #10 [ 24.837921] ? kobject_add_internal+0x8d4/0xbc0 [ 24.842638] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.842646] RIP: 0010:kobject_add_internal+0x8d4/0xbc0 [ 24.847106] __warn+0x1dc/0x200 [ 24.855558] RSP: 0018:ffff8801da4474a0 EFLAGS: 00010282 [ 24.859506] ? kobject_add_internal+0x8d4/0xbc0 [ 24.862665] RAX: dffffc0000000008 RBX: ffff8801aca89110 RCX: ffffffff815b193e [ 24.866089] report_bug+0x1f4/0x2b0 [ 24.873068] RDX: 0000000000000000 RSI: 1ffff1003b488e44 RDI: 1ffff1003b488e19 [ 24.877705] fixup_bug.part.10+0x37/0x80 [ 24.887025] RBP: ffff8801da447598 R08: 1ffff1003b488ddb R09: 0000000000000001 [ 24.892270] do_error_trap+0x2d7/0x3e0 [ 24.895515] R10: ffff8801da447260 R11: 0000000000000000 R12: 1ffff1003b488e9a [ 24.895521] R13: 00000000ffffffef R14: ffff8801d417a448 R15: 1ffff1003b488e9e [ 24.900852] ? vprintk_default+0x28/0x30 [ 24.905488] FS: 0000000001305880(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 [ 24.912726] ? math_error+0x400/0x400 [ 24.916316] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.916322] CR2: 0000000001915c60 CR3: 00000001acf8c001 CR4: 00000000001606f0 [ 24.923561] ? printk+0xaa/0xca [ 24.927588] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.934829] ? show_regs_print_info+0x18/0x18 [ 24.938680] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.938683] Call Trace: [ 24.945930] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 24.953170] ? kobj_ns_type_registered+0x50/0x50 [ 24.957201] do_invalid_op+0x1b/0x20 [ 24.965400] ? kfree_const+0x31/0x40 [ 24.969169] invalid_op+0x1b/0x40 [ 24.975018] ? rcu_read_lock_sched_held+0x108/0x120 [ 24.982258] RIP: 0010:kobject_add_internal+0x8d4/0xbc0 [ 24.985506] ? kfree+0x1f6/0x260 [ 24.992739] RSP: 0018:ffff8801da4874a0 EFLAGS: 00010282 [ 24.997208] ? kfree_const+0x36/0x40 [ 25.004448] RAX: dffffc0000000008 RBX: ffff8801d97650d0 RCX: ffffffff815b193e [ 25.007002] kobject_init_and_add+0xf9/0x150 [ 25.011807] RDX: 0000000000000000 RSI: 1ffff1003b490e44 RDI: 1ffff1003b490e19 [ 25.011813] RBP: ffff8801da487598 R08: 1ffff1003b490ddb R09: 0000000000000000 [ 25.016539] ? kset_create_and_add+0x170/0x170 [ 25.020217] R10: ffff8801da487260 R11: 0000000000000000 R12: 1ffff1003b490e9a [ 25.020223] R13: 00000000ffffffef R14: ffff8801d417a448 R15: 1ffff1003b490e9e [ 25.023995] ? vsnprintf+0x1ed/0x1900 [ 25.027417] ? vprintk_func+0x5e/0xc0 [ 25.032404] gfs2_sys_fs_add+0x1ff/0x580 [ 25.037647] ? kobj_ns_type_registered+0x50/0x50 [ 25.040977] ? recover_store+0x160/0x160 [ 25.046310] ? kfree_const+0x31/0x40 [ 25.049993] ? snprintf+0xc0/0xf0 [ 25.057232] ? rcu_read_lock_sched_held+0x108/0x120 [ 25.061610] ? vsprintf+0x40/0x40 [ 25.068853] ? kfree+0x1f6/0x260 [ 25.076093] ? set_blocksize+0x1f1/0x260 [ 25.080642] ? kfree_const+0x36/0x40 [ 25.087880] ? memcpy+0x45/0x50 [ 25.095123] kobject_init_and_add+0xf9/0x150 [ 25.098894] fill_super+0x86f/0x1d70 [ 25.102658] ? kset_create_and_add+0x170/0x170 [ 25.106686] ? vsnprintf+0x1ed/0x1900 [ 25.111411] ? vsnprintf+0x1ed/0x1900 [ 25.115441] ? gfs2_online_uevent+0x2a0/0x2a0 [ 25.119124] gfs2_sys_fs_add+0x1ff/0x580 [ 25.122540] ? memcpy+0x45/0x50 [ 25.127521] ? recover_store+0x160/0x160 [ 25.130947] ? match_strlcpy+0xbc/0xf0 [ 25.134277] ? snprintf+0xc0/0xf0 [ 25.138313] ? snprintf+0xc0/0xf0 [ 25.141993] ? vsprintf+0x40/0x40 [ 25.145245] ? vsprintf+0x40/0x40 [ 25.149620] ? set_blocksize+0x1f1/0x260 [ 25.153302] ? ns_capable_common+0xcf/0x160 [ 25.157849] ? memcpy+0x45/0x50 [ 25.161617] ? set_blocksize+0x1f1/0x260 [ 25.165389] fill_super+0x86f/0x1d70 [ 25.169851] gfs2_mount+0x587/0x6e0 [ 25.173881] ? vsnprintf+0x1ed/0x1900 [ 25.177128] ? gfs2_mount+0x587/0x6e0 [ 25.181158] ? gfs2_online_uevent+0x2a0/0x2a0 [ 25.185012] ? fill_super+0x1d70/0x1d70 [ 25.188433] ? memcpy+0x45/0x50 [ 25.191870] mount_fs+0x66/0x2d0 [ 25.195278] ? match_strlcpy+0xbc/0xf0 [ 25.198700] vfs_kern_mount.part.26+0xc6/0x4a0 [ 25.202738] ? snprintf+0xc0/0xf0 [ 25.207023] ? may_umount+0xa0/0xa0 [ 25.210270] ? vsprintf+0x40/0x40 [ 25.214303] ? _raw_read_unlock+0x22/0x30 [ 25.217981] ? ns_capable_common+0xcf/0x160 [ 25.221577] ? __get_fs_type+0x8a/0xc0 [ 25.225344] ? set_blocksize+0x1f1/0x260 [ 25.229115] do_mount+0xea4/0x2bb0 [ 25.233577] gfs2_mount+0x587/0x6e0 [ 25.237519] ? copy_mount_string+0x40/0x40 [ 25.240763] ? gfs2_mount+0x587/0x6e0 [ 25.244097] ? rcu_pm_notify+0xc0/0xc0 [ 25.247950] ? fill_super+0x1d70/0x1d70 [ 25.252500] ? copy_mount_options+0x5f/0x2e0 [ 25.255935] mount_fs+0x66/0x2d0 [ 25.259519] ? rcu_read_lock_sched_held+0x108/0x120 [ 25.262944] vfs_kern_mount.part.26+0xc6/0x4a0 [ 25.267060] ? kmem_cache_alloc_trace+0x459/0x740 [ 25.271351] ? may_umount+0xa0/0xa0 [ 25.275205] ? kasan_check_write+0x14/0x20 [ 25.288375] ? _raw_read_unlock+0x22/0x30 [ 25.291884] ? copy_mount_options+0x1f7/0x2e0 [ 25.295477] ? __get_fs_type+0x8a/0xc0 [ 25.299681] SyS_mount+0xab/0x120 [ 25.303452] do_mount+0xea4/0x2bb0 [ 25.307306] ? copy_mnt_ns+0xb30/0xb30 [ 25.311253] ? copy_mount_string+0x40/0x40 [ 25.315628] do_syscall_64+0x281/0x940 [ 25.318963] ? rcu_pm_notify+0xc0/0xc0 [ 25.324540] ? vmalloc_sync_all+0x30/0x30 [ 25.324550] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 25.329110] ? copy_mount_options+0x5f/0x2e0 [ 25.333917] ? syscall_return_slowpath+0x550/0x550 [ 25.337515] ? rcu_read_lock_sched_held+0x108/0x120 [ 25.341718] ? syscall_return_slowpath+0x2ac/0x550 [ 25.345838] ? kmem_cache_alloc_trace+0x459/0x740 [ 25.350301] ? prepare_exit_to_usermode+0x350/0x350 [ 25.354156] ? kasan_check_write+0x14/0x20 [ 25.357584] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 25.361088] ? copy_mount_options+0x1f7/0x2e0 [ 25.364948] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.369152] SyS_mount+0xab/0x120 [ 25.373014] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 25.376870] ? copy_mnt_ns+0xb30/0xb30 [ 25.380988] RIP: 0033:0x44313a [ 25.385719] do_syscall_64+0x281/0x940 [ 25.390091] RSP: 002b:00007fff66c99ba8 EFLAGS: 00000217 ORIG_RAX: 00000000000000a5 [ 25.394998] ? vmalloc_sync_all+0x30/0x30 [ 25.399983] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000044313a [ 25.404885] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 25.409689] RDX: 0000000020001880 RSI: 00000000200018c0 RDI: 00007fff66c99bc0 [ 25.409695] RBP: 00000000006cb018 R08: 0000000020001ec0 R09: 000000000000000a [ 25.414685] ? syscall_return_slowpath+0x550/0x550 [ 25.418884] R10: 0000000000000006 R11: 0000000000000217 R12: 6c6261746b636f6c [ 25.418890] R13: 746f72706b636f6c R14: 0030656c69662f2e R15: 0000000000000004 [ 25.424223] ? syscall_return_slowpath+0x2ac/0x550 [ 25.428693] Code: [ 25.433508] ? prepare_exit_to_usermode+0x350/0x350 [ 25.436926] 00 [ 25.442088] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 25.445939] 00 [ 25.449107] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.452958] 00 [ 25.460647] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 25.464758] 00 [ 25.472001] RIP: 0033:0x44313a [ 25.476721] fc [ 25.483959] RSP: 002b:00007fff66c99ba8 EFLAGS: 00000217 ORIG_RAX: 00000000000000a5 [ 25.491209] ff [ 25.496103] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000044313a [ 25.496108] RDX: 0000000020001880 RSI: 00000000200018c0 RDI: 00007fff66c99bc0 [ 25.503346] df [ 25.510586] RBP: 00000000006cb018 R08: 0000000020001ec0 R09: 000000000000000a [ 25.510592] R10: 0000000000000006 R11: 0000000000000217 R12: 6c6261746b636f6c [ 25.515489] 48 [ 25.517610] R13: 746f72706b636f6c R14: 0030656c69662f2e R15: 0000000000000004 [ 25.599811] c1 ea 03 80 3c 02 00 0f 85 aa 00 00 00 48 8b 13 48 c7 c6 00 24 d6 87 48 c7 c7 60 21 d6 87 e8 4c b3 62 fa <0f> 0b e9 1d fb ff ff e8 30 9e 92 fa 0f 0b e9 29 fe ff ff e8 24 [ 25.616349] ---[ end trace 14a172560d261382 ]--- [ 25.621537] Dumping ftrace buffer: [ 25.625184] (ftrace buffer empty) [ 25.628870] Kernel Offset: disabled [ 25.632470] Rebooting in 86400 seconds..