[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.224' (ECDSA) to the list of known hosts. syzkaller login: [ 45.827313] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 45.828853] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 45.848155] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 45.849539] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 45.858346] ------------[ cut here ]------------ [ 45.862347] ------------[ cut here ]------------ [ 45.866337] WARNING: CPU: 1 PID: 7987 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 [ 45.871071] WARNING: CPU: 0 PID: 7991 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 [ 45.879275] Kernel panic - not syncing: panic_on_warn set ... [ 45.879275] [ 45.887492] Modules linked in: [ 45.894832] CPU: 1 PID: 7987 Comm: syz-executor286 Not tainted 4.14.282-syzkaller #0 [ 45.894841] CPU: 0 PID: 7991 Comm: syz-executor286 Not tainted 4.14.282-syzkaller #0 [ 45.898005] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.905859] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.913712] Call Trace: [ 45.923046] task: ffff888095b3c540 task.stack: ffff8880b3d88000 [ 45.932394] dump_stack+0x1b2/0x281 [ 45.934950] RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 [ 45.940981] panic+0x1f9/0x42d [ 45.944578] RSP: 0018:ffff8880b3d8f728 EFLAGS: 00010282 [ 45.949571] ? add_taint.cold+0x16/0x16 [ 45.958075] ? sysfs_warn_dup.cold+0x17/0x26 [ 45.962019] RAX: 000000000000003a RBX: ffff888096ca9c90 RCX: 0000000000000000 [ 45.966421] ? sysfs_warn_dup.cold+0x17/0x26 [ 45.973667] RDX: 0000000000000000 RSI: ffffffff878bc600 RDI: ffffed10167b1edb [ 45.978051] __warn.cold+0x20/0x44 [ 45.985296] RBP: ffff8880b316adc0 R08: 000000000000003a R09: 0000000000000000 [ 45.988814] ? ist_end_non_atomic+0x10/0x10 [ 45.996055] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888238c29e00 [ 46.000367] ? sysfs_warn_dup.cold+0x17/0x26 [ 46.007612] R13: ffff8880af99a500 R14: ffff888096ca9c98 R15: ffff88809e121c58 [ 46.011997] report_bug+0x208/0x250 [ 46.019242] FS: 0000555556e8d300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 46.022847] do_error_trap+0x195/0x2d0 [ 46.031047] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 46.034915] ? math_error+0x2d0/0x2d0 [ 46.040794] CR2: 00007febc7fb2d60 CR3: 00000000a577b000 CR4: 00000000003406f0 [ 46.044581] ? ___preempt_schedule+0x16/0x18 [ 46.051844] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 46.056231] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.063472] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 46.068293] invalid_op+0x1b/0x40 [ 46.075537] Call Trace: [ 46.078972] RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 [ 46.081532] sysfs_create_dir_ns+0x16f/0x1d0 [ 46.086537] RSP: 0018:ffff88809591f728 EFLAGS: 00010282 [ 46.090924] kobject_add_internal+0x28b/0x930 [ 46.090935] kobject_init_and_add+0xde/0x120 [ 46.096270] RAX: 000000000000003a RBX: ffff8880b4afdc10 RCX: 0000000000000000 [ 46.096276] RDX: 0000000000000000 RSI: ffffffff878bc600 RDI: ffffed1012b23edb [ 46.100747] ? kobject_create_and_add+0x200/0x200 [ 46.105125] RBP: ffff8880b37761c0 R08: 000000000000003a R09: 0000000000000000 [ 46.112375] ? vsnprintf+0x260/0x1340 [ 46.119620] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888238c29e00 [ 46.124445] gfs2_sys_fs_add+0x184/0x3f0 [ 46.131686] R13: ffff8880afdb7f40 R14: ffff8880b4afdc18 R15: ffff8880b4659bd8 [ 46.135485] ? recover_store+0x100/0x100 [ 46.142738] ? sysfs_warn_dup.cold+0x17/0x26 [ 46.146766] ? snprintf+0xa5/0xd0 [ 46.154012] sysfs_create_dir_ns+0x16f/0x1d0 [ 46.158073] ? memcpy+0x35/0x50 [ 46.162451] kobject_add_internal+0x28b/0x930 [ 46.165877] fill_super+0x118b/0x2310 [ 46.170288] kobject_init_and_add+0xde/0x120 [ 46.173540] ? vsnprintf+0x260/0x1340 [ 46.178009] ? kobject_create_and_add+0x200/0x200 [ 46.181786] ? gfs2_online_uevent+0x1b0/0x1b0 [ 46.186170] ? vsnprintf+0x260/0x1340 [ 46.189944] ? pointer+0x9e0/0x9e0 [ 46.194766] gfs2_sys_fs_add+0x184/0x3f0 [ 46.199234] ? snprintf+0xa5/0xd0 [ 46.203011] ? recover_store+0x100/0x100 [ 46.206543] ? vsprintf+0x30/0x30 [ 46.210582] ? snprintf+0xa5/0xd0 [ 46.214029] ? gfs2_open+0x160/0x160 [ 46.218067] ? memcpy+0x35/0x50 [ 46.221506] ? set_blocksize+0x125/0x380 [ 46.224936] fill_super+0x118b/0x2310 [ 46.228626] gfs2_mount+0x439/0x510 [ 46.231878] ? vsnprintf+0x260/0x1340 [ 46.235921] ? fill_super+0x2310/0x2310 [ 46.239694] ? gfs2_online_uevent+0x1b0/0x1b0 [ 46.243305] ? alloc_pages_current+0x15d/0x260 [ 46.247067] ? pointer+0x9e0/0x9e0 [ 46.251019] ? __lockdep_init_map+0x100/0x560 [ 46.255483] ? snprintf+0xa5/0xd0 [ 46.260036] mount_fs+0x92/0x2a0 [ 46.263547] ? vsprintf+0x30/0x30 [ 46.268033] vfs_kern_mount.part.0+0x5b/0x470 [ 46.271456] ? gfs2_open+0x160/0x160 [ 46.274795] do_mount+0xe65/0x2a30 [ 46.278218] ? set_blocksize+0x125/0x380 [ 46.282684] ? do_raw_spin_unlock+0x164/0x220 [ 46.286371] gfs2_mount+0x439/0x510 [ 46.289889] ? copy_mount_string+0x40/0x40 [ 46.293934] ? fill_super+0x2310/0x2310 [ 46.298404] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 46.302015] ? alloc_pages_current+0x15d/0x260 [ 46.306221] ? copy_mnt_ns+0xa30/0xa30 [ 46.310166] ? __lockdep_init_map+0x100/0x560 [ 46.315163] ? copy_mount_options+0x1fa/0x2f0 [ 46.319717] mount_fs+0x92/0x2a0 [ 46.323577] ? copy_mnt_ns+0xa30/0xa30 [ 46.328046] vfs_kern_mount.part.0+0x5b/0x470 [ 46.332515] SyS_mount+0xa8/0x120 [ 46.335868] do_mount+0xe65/0x2a30 [ 46.339729] ? copy_mnt_ns+0xa30/0xa30 [ 46.344201] ? do_raw_spin_unlock+0x164/0x220 [ 46.347628] do_syscall_64+0x1d5/0x640 [ 46.351155] ? copy_mount_string+0x40/0x40 [ 46.355019] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 46.359498] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 46.363357] RIP: 0033:0x7febc7fdf4aa [ 46.367566] ? copy_mnt_ns+0xa30/0xa30 [ 46.372724] RSP: 002b:00007ffe28353208 EFLAGS: 00000282 [ 46.377719] ? copy_mount_options+0x1fa/0x2f0 [ 46.381399] ORIG_RAX: 00000000000000a5 [ 46.385266] ? copy_mnt_ns+0xa30/0xa30 [ 46.390598] RAX: ffffffffffffffda RBX: 00007ffe28353260 RCX: 00007febc7fdf4aa [ 46.395070] SyS_mount+0xa8/0x120 [ 46.399010] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffe28353220 [ 46.402872] ? copy_mnt_ns+0xa30/0xa30 [ 46.410115] RBP: 00007ffe28353220 R08: 00007ffe28353260 R09: 0000000000000002 [ 46.413546] do_syscall_64+0x1d5/0x640 [ 46.420788] R10: 0000000000000000 R11: 0000000000000282 R12: 000000002000dca0 [ 46.424655] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 46.431895] R13: 0000000000000003 R14: 0000000000000004 R15: 000000000000091c [ 46.435760] RIP: 0033:0x7febc7fdf4aa [ 46.443007] Code: [ 46.448163] RSP: 002b:00007ffe28353208 EFLAGS: 00000282 [ 46.455411] bd [ 46.459096] ORIG_RAX: 00000000000000a5 [ 46.461229] ea [ 46.466588] RAX: ffffffffffffffda RBX: 00007ffe28353260 RCX: 00007febc7fdf4aa [ 46.468451] ff [ 46.472405] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffe28353220 [ 46.474265] ff [ 46.481505] RBP: 00007ffe28353220 R08: 00007ffe28353260 R09: 0000000000000002 [ 46.481511] R10: 0000000000000000 R11: 0000000000000282 R12: 000000002000dca0 [ 46.483371] ff [ 46.490616] R13: 0000000000000003 R14: 0000000000000004 R15: 000000000000091c [ 46.492477] e9 db e6 9f fa 4c 89 ff e8 10 09 7b fa eb da e8 69 50 51 fa 4c 89 ea 48 89 ee 48 c7 c7 c0 b8 95 87 e8 ff fb fe ff <0f> 0b 48 89 ef 5d 41 5c 41 5d e9 b8 de 7a fa e8 43 50 51 fa 4d [ 46.533412] ---[ end trace c0c299556481cd2c ]--- [ 46.538300] Kernel Offset: disabled [ 46.541965] Rebooting in 86400 seconds..