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 '10.128.10.23' (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: [ 23.186419] gfs2: fsid=_: Trying to join cluster "lock_nolock", "_" [ 23.193064] gfs2: fsid=_: Now mounting FS... [ 23.194864] sysfs: cannot create duplicate filename '/fs/gfs2/_' [ 23.202616] sysfs: cannot create duplicate filename '/fs/gfs2/_' [ 23.204055] CPU: 0 PID: 4438 Comm: syzkaller686586 Not tainted 4.16.0-rc7+ #8 [ 23.217432] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.227703] Call Trace: [ 23.230284] dump_stack+0x194/0x24d [ 23.233893] ? arch_local_irq_restore+0x53/0x53 [ 23.238552] ? trace_hardirqs_on+0xd/0x10 [ 23.242686] ? sysfs_warn_dup+0x6c/0xa0 [ 23.246643] sysfs_warn_dup+0x83/0xa0 [ 23.250429] sysfs_create_dir_ns+0x178/0x1d0 [ 23.254821] kobject_add_internal+0x335/0xbc0 [ 23.259300] ? kobj_ns_type_registered+0x50/0x50 [ 23.264038] ? kfree_const+0x31/0x40 [ 23.267731] ? rcu_read_lock_sched_held+0x108/0x120 [ 23.272727] ? kfree+0x1f6/0x260 [ 23.276075] ? kfree_const+0x36/0x40 [ 23.279774] kobject_init_and_add+0xf9/0x150 [ 23.284161] ? kset_create_and_add+0x170/0x170 [ 23.288724] ? vsnprintf+0x1ed/0x1900 [ 23.292513] gfs2_sys_fs_add+0x1ff/0x580 [ 23.296555] ? recover_store+0x160/0x160 [ 23.300598] ? snprintf+0xc0/0xf0 [ 23.304031] ? vsprintf+0x40/0x40 [ 23.307465] ? set_blocksize+0x1f1/0x260 [ 23.311508] ? memcpy+0x45/0x50 [ 23.314773] fill_super+0x86f/0x1d70 [ 23.318469] ? vsnprintf+0x1ed/0x1900 [ 23.322256] ? gfs2_online_uevent+0x2a0/0x2a0 [ 23.326734] ? memcpy+0x45/0x50 [ 23.329995] ? match_strlcpy+0xbc/0xf0 [ 23.333865] ? snprintf+0xc0/0xf0 [ 23.337296] ? vsprintf+0x40/0x40 [ 23.340731] ? ns_capable_common+0xcf/0x160 [ 23.345035] ? set_blocksize+0x1f1/0x260 [ 23.349079] gfs2_mount+0x587/0x6e0 [ 23.352690] ? gfs2_mount+0x587/0x6e0 [ 23.356473] ? fill_super+0x1d70/0x1d70 [ 23.360448] mount_fs+0x66/0x2d0 [ 23.363801] vfs_kern_mount.part.26+0xc6/0x4a0 [ 23.368364] ? may_umount+0xa0/0xa0 [ 23.371973] ? _raw_read_unlock+0x22/0x30 [ 23.376100] ? __get_fs_type+0x8a/0xc0 [ 23.379968] do_mount+0xea4/0x2bb0 [ 23.383491] ? copy_mount_string+0x40/0x40 [ 23.387711] ? rcu_pm_notify+0xc0/0xc0 [ 23.391582] ? copy_mount_options+0x5f/0x2e0 [ 23.395969] ? rcu_read_lock_sched_held+0x108/0x120 [ 23.400965] ? kmem_cache_alloc_trace+0x459/0x740 [ 23.405796] ? copy_mount_options+0x1f7/0x2e0 [ 23.410275] SyS_mount+0xab/0x120 [ 23.413707] ? copy_mnt_ns+0xb30/0xb30 [ 23.417575] do_syscall_64+0x281/0x940 [ 23.421445] ? vmalloc_sync_all+0x30/0x30 [ 23.425578] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 23.430315] ? syscall_return_slowpath+0x550/0x550 [ 23.435228] ? syscall_return_slowpath+0x2ac/0x550 [ 23.440137] ? prepare_exit_to_usermode+0x350/0x350 [ 23.445154] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 23.450516] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 23.455345] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 23.460513] RIP: 0033:0x4430da [ 23.463686] RSP: 002b:00007ffc35db3528 EFLAGS: 00000217 ORIG_RAX: 00000000000000a5 [ 23.471375] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004430da [ 23.478625] RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007ffc35db3540 [ 23.485877] RBP: 00000000006cb018 R08: 0000000020000300 R09: 000000000000000a [ 23.493125] R10: 0000000020000000 R11: 0000000000000217 R12: 746f72706b636f6c [ 23.500374] R13: 6c6261746b636f6c R14: 0030656c69662f2e R15: 0000000000000004 [ 23.507637] CPU: 1 PID: 4437 Comm: syzkaller686586 Not tainted 4.16.0-rc7+ #8 [ 23.507684] ------------[ cut here ]------------ [ 23.514895] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.514899] Call Trace: [ 23.514910] dump_stack+0x194/0x24d [ 23.514921] ? arch_local_irq_restore+0x53/0x53 [ 23.519663] kobject_add_internal failed for _ with -EEXIST, don't try to register things with the same name in the same directory. [ 23.528971] ? trace_hardirqs_on+0xd/0x10 [ 23.528982] ? sysfs_warn_dup+0x6c/0xa0 [ 23.528992] sysfs_warn_dup+0x83/0xa0 [ 23.531767] WARNING: CPU: 0 PID: 4438 at lib/kobject.c:238 kobject_add_internal+0x8d4/0xbc0 [ 23.535149] sysfs_create_dir_ns+0x178/0x1d0 [ 23.539784] Kernel panic - not syncing: panic_on_warn set ... [ 23.539784] [ 23.551628] kobject_add_internal+0x335/0xbc0 [ 23.588090] ? kobj_ns_type_registered+0x50/0x50 [ 23.592823] ? kfree_const+0x31/0x40 [ 23.596516] ? rcu_read_lock_sched_held+0x108/0x120 [ 23.601511] ? kfree+0x1f6/0x260 [ 23.604856] ? kfree_const+0x36/0x40 [ 23.608550] kobject_init_and_add+0xf9/0x150 [ 23.612937] ? kset_create_and_add+0x170/0x170 [ 23.617497] ? vsnprintf+0x1ed/0x1900 [ 23.621285] gfs2_sys_fs_add+0x1ff/0x580 [ 23.625321] ? recover_store+0x160/0x160 [ 23.629359] ? snprintf+0xc0/0xf0 [ 23.632789] ? vsprintf+0x40/0x40 [ 23.636222] ? set_blocksize+0x1f1/0x260 [ 23.640264] ? memcpy+0x45/0x50 [ 23.643527] fill_super+0x86f/0x1d70 [ 23.647218] ? vsnprintf+0x1ed/0x1900 [ 23.651002] ? gfs2_online_uevent+0x2a0/0x2a0 [ 23.655475] ? memcpy+0x45/0x50 [ 23.658734] ? match_strlcpy+0xbc/0xf0 [ 23.662600] ? snprintf+0xc0/0xf0 [ 23.666031] ? vsprintf+0x40/0x40 [ 23.669464] ? ns_capable_common+0xcf/0x160 [ 23.673763] ? set_blocksize+0x1f1/0x260 [ 23.677803] gfs2_mount+0x587/0x6e0 [ 23.681406] ? gfs2_mount+0x587/0x6e0 [ 23.685188] ? fill_super+0x1d70/0x1d70 [ 23.689163] mount_fs+0x66/0x2d0 [ 23.692510] vfs_kern_mount.part.26+0xc6/0x4a0 [ 23.697069] ? may_umount+0xa0/0xa0 [ 23.700673] ? _raw_read_unlock+0x22/0x30 [ 23.704798] ? __get_fs_type+0x8a/0xc0 [ 23.708665] do_mount+0xea4/0x2bb0 [ 23.712186] ? copy_mount_string+0x40/0x40 [ 23.716401] ? rcu_pm_notify+0xc0/0xc0 [ 23.720269] ? copy_mount_options+0x5f/0x2e0 [ 23.724655] ? rcu_read_lock_sched_held+0x108/0x120 [ 23.729649] ? kmem_cache_alloc_trace+0x459/0x740 [ 23.734473] ? kasan_check_write+0x14/0x20 [ 23.738687] ? _copy_from_user+0x99/0x110 [ 23.742813] ? copy_mount_options+0x1f7/0x2e0 [ 23.747288] SyS_mount+0xab/0x120 [ 23.750719] ? copy_mnt_ns+0xb30/0xb30 [ 23.754587] do_syscall_64+0x281/0x940 [ 23.758450] ? vmalloc_sync_all+0x30/0x30 [ 23.762576] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 23.767311] ? syscall_return_slowpath+0x550/0x550 [ 23.772219] ? syscall_return_slowpath+0x2ac/0x550 [ 23.777126] ? prepare_exit_to_usermode+0x350/0x350 [ 23.782124] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 23.787469] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 23.792294] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 23.797460] RIP: 0033:0x4430da [ 23.800627] RSP: 002b:00007ffc35db3528 EFLAGS: 00000217 ORIG_RAX: 00000000000000a5 [ 23.808315] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004430da [ 23.815563] RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007ffc35db3540 [ 23.822810] RBP: 00000000006cb018 R08: 0000000020000300 R09: 000000000000000a [ 23.830056] R10: 0000000020000000 R11: 0000000000000217 R12: 746f72706b636f6c [ 23.837304] R13: 6c6261746b636f6c R14: 0030656c69662f2e R15: 0000000000000004 [ 23.844565] CPU: 0 PID: 4438 Comm: syzkaller686586 Not tainted 4.16.0-rc7+ #8 [ 23.844686] ------------[ cut here ]------------ [ 23.851822] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.851825] Call Trace: [ 23.851836] dump_stack+0x194/0x24d [ 23.851846] ? arch_local_irq_restore+0x53/0x53 [ 23.856583] kobject_add_internal failed for _ with -EEXIST, don't try to register things with the same name in the same directory. [ 23.865902] ? vsnprintf+0x1ed/0x1900 [ 23.865911] panic+0x1e4/0x41c [ 23.865919] ? refcount_error_report+0x214/0x214 [ 23.868686] WARNING: CPU: 1 PID: 4437 at lib/kobject.c:238 kobject_add_internal+0x8d4/0xbc0 [ 23.872076] ? show_regs_print_info+0x18/0x18 [ 23.876710] Modules linked in: [ 23.888557] ? vprintk_emit+0xa5f/0xb90 [ 23.892327] CPU: 1 PID: 4437 Comm: syzkaller686586 Not tainted 4.16.0-rc7+ #8 [ 23.895488] ? __warn+0x1c1/0x200 [ 23.900210] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.908669] ? kobject_add_internal+0x8d4/0xbc0 [ 23.913137] RIP: 0010:kobject_add_internal+0x8d4/0xbc0 [ 23.916299] __warn+0x1dc/0x200 [ 23.920237] RSP: 0018:ffff8801b5bbf4a0 EFLAGS: 00010282 [ 23.927485] ? kobject_add_internal+0x8d4/0xbc0 [ 23.930902] RAX: dffffc0000000008 RBX: ffff8801b4281190 RCX: ffffffff815b193e [ 23.930908] RDX: 0000000000000000 RSI: 1ffff10036b77e44 RDI: 1ffff10036b77e19 [ 23.940234] report_bug+0x1f4/0x2b0 [ 23.944865] RBP: ffff8801b5bbf598 R08: 1ffff10036b77ddb R09: 0000000000000001 [ 23.944871] R10: ffff8801b5bbf260 R11: 0000000000000000 R12: 1ffff10036b77e9a [ 23.950120] fixup_bug.part.10+0x37/0x80 [ 23.953368] R13: 00000000ffffffef R14: ffff8801d3991948 R15: 1ffff10036b77e9e [ 23.958704] do_error_trap+0x2d7/0x3e0 [ 23.963342] FS: 0000000001d31880(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000 [ 23.970611] ? vprintk_default+0x28/0x30 [ 23.977850] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.977856] CR2: 0000000000a9d1b0 CR3: 00000001b5847005 CR4: 00000000001606e0 [ 23.981455] ? math_error+0x400/0x400 [ 23.988693] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.995934] ? printk+0xaa/0xca [ 23.999957] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.999961] Call Trace: [ 24.007206] ? show_regs_print_info+0x18/0x18 [ 24.011065] ? kobj_ns_type_registered+0x50/0x50 [ 24.019263] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 24.023314] ? kfree_const+0x31/0x40 [ 24.029165] do_invalid_op+0x1b/0x20 [ 24.036408] ? rcu_read_lock_sched_held+0x108/0x120 [ 24.040175] invalid_op+0x1b/0x40 [ 24.047418] ? kfree+0x1f6/0x260 [ 24.050668] RIP: 0010:kobject_add_internal+0x8d4/0xbc0 [ 24.057911] ? kfree_const+0x36/0x40 [ 24.060462] RSP: 0018:ffff8801b47274a0 EFLAGS: 00010282 [ 24.064935] kobject_init_and_add+0xf9/0x150 [ 24.069654] RAX: dffffc0000000008 RBX: ffff8801b41d9150 RCX: ffffffff815b193e [ 24.069660] RDX: 0000000000000000 RSI: 1ffff100368e4e44 RDI: 1ffff100368e4e19 [ 24.074471] ? kset_create_and_add+0x170/0x170 [ 24.078152] RBP: ffff8801b4727598 R08: 1ffff100368e4ddb R09: 0000000000000000 [ 24.081841] ? vsnprintf+0x1ed/0x1900 [ 24.086820] R10: ffff8801b4727260 R11: 0000000000000000 R12: 1ffff100368e4e9a [ 24.086826] R13: 00000000ffffffef R14: ffff8801d3991948 R15: 1ffff100368e4e9e [ 24.090258] gfs2_sys_fs_add+0x1ff/0x580 [ 24.093591] ? vprintk_func+0x5e/0xc0 [ 24.098836] ? recover_store+0x160/0x160 [ 24.102525] ? kobj_ns_type_registered+0x50/0x50 [ 24.107854] ? snprintf+0xc0/0xf0 [ 24.112231] ? kfree_const+0x31/0x40 [ 24.119471] ? vsprintf+0x40/0x40 [ 24.126713] ? rcu_read_lock_sched_held+0x108/0x120 [ 24.131264] ? set_blocksize+0x1f1/0x260 [ 24.138505] ? kfree+0x1f6/0x260 [ 24.142272] ? memcpy+0x45/0x50 [ 24.149520] ? kfree_const+0x36/0x40 [ 24.156763] fill_super+0x86f/0x1d70 [ 24.160791] kobject_init_and_add+0xf9/0x150 [ 24.164562] ? vsnprintf+0x1ed/0x1900 [ 24.168593] ? kset_create_and_add+0x170/0x170 [ 24.173321] ? gfs2_online_uevent+0x2a0/0x2a0 [ 24.176744] ? vsnprintf+0x1ed/0x1900 [ 24.180427] ? memcpy+0x45/0x50 [ 24.183855] gfs2_sys_fs_add+0x1ff/0x580 [ 24.188836] ? match_strlcpy+0xbc/0xf0 [ 24.192863] ? recover_store+0x160/0x160 [ 24.196202] ? snprintf+0xc0/0xf0 [ 24.199463] ? snprintf+0xc0/0xf0 [ 24.203147] ? vsprintf+0x40/0x40 [ 24.206829] ? vsprintf+0x40/0x40 [ 24.211213] ? ns_capable_common+0xcf/0x160 [ 24.214981] ? set_blocksize+0x1f1/0x260 [ 24.219531] ? set_blocksize+0x1f1/0x260 [ 24.223996] ? memcpy+0x45/0x50 [ 24.227765] gfs2_mount+0x587/0x6e0 [ 24.231017] fill_super+0x86f/0x1d70 [ 24.235044] ? gfs2_mount+0x587/0x6e0 [ 24.238903] ? vsnprintf+0x1ed/0x1900 [ 24.242933] ? fill_super+0x1d70/0x1d70 [ 24.246360] ? gfs2_online_uevent+0x2a0/0x2a0 [ 24.249798] mount_fs+0x66/0x2d0 [ 24.253208] ? memcpy+0x45/0x50 [ 24.256632] vfs_kern_mount.part.26+0xc6/0x4a0 [ 24.260920] ? match_strlcpy+0xbc/0xf0 [ 24.264949] ? may_umount+0xa0/0xa0 [ 24.268981] ? snprintf+0xc0/0xf0 [ 24.272228] ? _raw_read_unlock+0x22/0x30 [ 24.275823] ? vsprintf+0x40/0x40 [ 24.279520] ? __get_fs_type+0x8a/0xc0 [ 24.283292] ? ns_capable_common+0xcf/0x160 [ 24.287068] do_mount+0xea4/0x2bb0 [ 24.291012] ? set_blocksize+0x1f1/0x260 [ 24.295476] ? copy_mount_string+0x40/0x40 [ 24.298810] gfs2_mount+0x587/0x6e0 [ 24.302056] ? rcu_pm_notify+0xc0/0xc0 [ 24.306608] ? gfs2_mount+0x587/0x6e0 [ 24.310469] ? copy_mount_options+0x5f/0x2e0 [ 24.314062] ? fill_super+0x1d70/0x1d70 [ 24.317485] ? rcu_read_lock_sched_held+0x108/0x120 [ 24.321621] mount_fs+0x66/0x2d0 [ 24.325026] ? kmem_cache_alloc_trace+0x459/0x740 [ 24.328881] vfs_kern_mount.part.26+0xc6/0x4a0 [ 24.333170] ? kasan_check_write+0x14/0x20 [ 24.336680] ? may_umount+0xa0/0xa0 [ 24.340711] ? _copy_from_user+0x99/0x110 [ 24.344913] ? _raw_read_unlock+0x22/0x30 [ 24.348509] ? copy_mount_options+0x1f7/0x2e0 [ 24.352365] ? __get_fs_type+0x8a/0xc0 [ 24.356137] SyS_mount+0xab/0x120 [ 24.360514] do_mount+0xea4/0x2bb0 [ 24.364455] ? copy_mnt_ns+0xb30/0xb30 [ 24.369443] ? copy_mount_string+0x40/0x40 [ 24.372777] do_syscall_64+0x281/0x940 [ 24.377595] ? rcu_pm_notify+0xc0/0xc0 [ 24.382146] ? vmalloc_sync_all+0x30/0x30 [ 24.386352] ? copy_mount_options+0x5f/0x2e0 [ 24.389945] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 24.394064] ? rcu_read_lock_sched_held+0x108/0x120 [ 24.398181] ? syscall_return_slowpath+0x550/0x550 [ 24.402646] ? kmem_cache_alloc_trace+0x459/0x740 [ 24.406503] ? syscall_return_slowpath+0x2ac/0x550 [ 24.409931] ? copy_mount_options+0x1f7/0x2e0 [ 24.413440] ? prepare_exit_to_usermode+0x350/0x350 [ 24.417301] SyS_mount+0xab/0x120 [ 24.421506] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 24.425365] ? copy_mnt_ns+0xb30/0xb30 [ 24.429227] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 24.433345] do_syscall_64+0x281/0x940 [ 24.437726] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 24.442449] ? vmalloc_sync_all+0x30/0x30 [ 24.447435] RIP: 0033:0x4430da [ 24.452335] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 24.457143] RSP: 002b:00007ffc35db3528 EFLAGS: 00000217 [ 24.462045] ? syscall_return_slowpath+0x550/0x550 [ 24.466502] ORIG_RAX: 00000000000000a5 [ 24.471492] ? syscall_return_slowpath+0x2ac/0x550 [ 24.474911] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004430da [ 24.480245] ? prepare_exit_to_usermode+0x350/0x350 [ 24.484099] RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007ffc35db3540 [ 24.484105] RBP: 00000000006cb018 R08: 0000000020000300 R09: 000000000000000a [ 24.488922] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 24.492772] R10: 0000000020000000 R11: 0000000000000217 R12: 746f72706b636f6c [ 24.492778] R13: 6c6261746b636f6c R14: 0030656c69662f2e R15: 0000000000000004 [ 24.497941] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 24.502058] Code: [ 24.505222] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 24.509943] 00 [ 24.515279] RIP: 0033:0x4430da [ 24.520174] 00 [ 24.524118] RSP: 002b:00007ffc35db3528 EFLAGS: 00000217 [ 24.529016] 00 [ 24.536257] ORIG_RAX: 00000000000000a5 [ 24.536264] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004430da [ 24.541247] 00 [ 24.548487] RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007ffc35db3540 [ 24.548492] RBP: 00000000006cb018 R08: 0000000020000300 R09: 000000000000000a [ 24.555729] fc ff [ 24.561068] R10: 0000000020000000 R11: 0000000000000217 R12: 746f72706b636f6c [ 24.568315] df [ 24.575557] R13: 6c6261746b636f6c R14: 0030656c69662f2e R15: 0000000000000004 [ 24.647699] 48 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 [ 24.664513] ---[ end trace 0eedf20a0a30ae57 ]--- [ 24.669713] Dumping ftrace buffer: [ 24.673368] (ftrace buffer empty) [ 24.677048] Kernel Offset: disabled [ 24.680648] Rebooting in 86400 seconds..