[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.98' (ECDSA) to the list of known hosts. syzkaller login: [ 29.911721] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 29.914313] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 29.929720] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 29.938616] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 29.939172] gfs2: fsid=syz:syz: Now mounting FS... [ 29.947625] ------------[ cut here ]------------ [ 29.955009] WARNING: CPU: 1 PID: 7975 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 [ 29.955699] ------------[ cut here ]------------ [ 29.963235] Kernel panic - not syncing: panic_on_warn set ... [ 29.963235] [ 29.967988] WARNING: CPU: 0 PID: 7983 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 [ 29.975314] CPU: 1 PID: 7975 Comm: syz-executor716 Not tainted 4.14.232-syzkaller #0 [ 29.983511] Modules linked in: [ 29.991368] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.991372] Call Trace: [ 30.003882] dump_stack+0x1b2/0x281 [ 30.006434] CPU: 0 PID: 7983 Comm: syz-executor716 Not tainted 4.14.232-syzkaller #0 [ 30.010036] panic+0x1f9/0x42d [ 30.017883] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.021051] ? add_taint.cold+0x16/0x16 [ 30.030380] task: ffff8880b3ac2180 task.stack: ffff8880b34d0000 [ 30.034336] ? sysfs_warn_dup.cold+0x17/0x26 [ 30.040364] RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 [ 30.045020] ? sysfs_warn_dup.cold+0x17/0x26 [ 30.050007] RSP: 0018:ffff8880b34d7728 EFLAGS: 00010282 [ 30.054393] __warn.cold+0x20/0x44 [ 30.059727] RAX: 000000000000003a RBX: ffff88809c7fdd90 RCX: 0000000000000000 [ 30.063245] ? ist_end_non_atomic+0x10/0x10 [ 30.070502] RDX: 0000000000000000 RSI: ffffffff878bbbc0 RDI: ffffed101669aedb [ 30.074811] ? sysfs_warn_dup.cold+0x17/0x26 [ 30.082054] RBP: ffff8880b3c220c0 R08: 000000000000003a R09: 0000000000000000 [ 30.086437] report_bug+0x208/0x250 [ 30.093681] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b127d8c0 [ 30.097299] do_error_trap+0x195/0x2d0 [ 30.104538] R13: ffff88809b7cd000 R14: ffff88809c7fdd98 R15: ffff88809c675d58 [ 30.108401] ? math_error+0x2d0/0x2d0 [ 30.115684] FS: 0000000000d21300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 30.119464] ? ___preempt_schedule+0x16/0x18 [ 30.127669] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.132068] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.137919] CR2: 00007fc98217d000 CR3: 00000000ac3b3000 CR4: 00000000001406f0 [ 30.137926] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.142746] invalid_op+0x1b/0x40 [ 30.149987] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.157228] RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 [ 30.160652] Call Trace: [ 30.167916] RSP: 0018:ffff8880b344f728 EFLAGS: 00010282 [ 30.172911] sysfs_create_dir_ns+0x16f/0x1d0 [ 30.180827] kobject_add_internal+0x28b/0x930 [ 30.185207] RAX: 000000000000003a RBX: ffff88809c675d50 RCX: 0000000000000000 [ 30.189683] kobject_init_and_add+0xde/0x120 [ 30.196923] RDX: 0000000000000000 RSI: ffffffff878bbbc0 RDI: ffffed1016689edb [ 30.201309] ? kobject_create_and_add+0x200/0x200 [ 30.208552] RBP: ffff88809a106ec0 R08: 000000000000003a R09: 0000000000000000 [ 30.213378] ? vsnprintf+0x260/0x1340 [ 30.220629] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b127d8c0 [ 30.224431] gfs2_sys_fs_add+0x184/0x3f0 [ 30.231673] R13: ffff8880a8ce1840 R14: ffff88809c675d58 R15: ffff88809c539d18 [ 30.235710] ? recover_store+0x100/0x100 [ 30.242975] ? sysfs_warn_dup.cold+0x17/0x26 [ 30.247003] ? snprintf+0xa5/0xd0 [ 30.251385] sysfs_create_dir_ns+0x16f/0x1d0 [ 30.254815] ? memcpy+0x35/0x50 [ 30.259196] kobject_add_internal+0x28b/0x930 [ 30.262468] fill_super+0x118b/0x2310 [ 30.266950] kobject_init_and_add+0xde/0x120 [ 30.270738] ? vsnprintf+0x260/0x1340 [ 30.275134] ? kobject_create_and_add+0x200/0x200 [ 30.278909] ? gfs2_online_uevent+0x1b0/0x1b0 [ 30.283729] ? vsnprintf+0x260/0x1340 [ 30.288326] ? pointer+0x9e0/0x9e0 [ 30.292123] gfs2_sys_fs_add+0x184/0x3f0 [ 30.295669] ? snprintf+0xa5/0xd0 [ 30.299711] ? recover_store+0x100/0x100 [ 30.303142] ? vsprintf+0x30/0x30 [ 30.307181] ? snprintf+0xa5/0xd0 [ 30.310610] ? gfs2_open+0x160/0x160 [ 30.314039] ? memcpy+0x35/0x50 [ 30.317726] ? set_blocksize+0x125/0x380 [ 30.320980] fill_super+0x118b/0x2310 [ 30.325016] gfs2_mount+0x439/0x510 [ 30.328790] ? vsnprintf+0x260/0x1340 [ 30.332388] ? fill_super+0x2310/0x2310 [ 30.336161] ? gfs2_online_uevent+0x1b0/0x1b0 [ 30.340127] ? alloc_pages_current+0x15d/0x260 [ 30.344596] ? pointer+0x9e0/0x9e0 [ 30.349157] ? __lockdep_init_map+0x100/0x560 [ 30.352689] ? snprintf+0xa5/0xd0 [ 30.357178] mount_fs+0x92/0x2a0 [ 30.360603] ? vsprintf+0x30/0x30 [ 30.363970] vfs_kern_mount.part.0+0x5b/0x470 [ 30.367399] ? gfs2_open+0x160/0x160 [ 30.371872] do_mount+0xe53/0x2a00 [ 30.375578] ? set_blocksize+0x125/0x380 [ 30.379091] ? do_raw_spin_unlock+0x164/0x220 [ 30.383131] gfs2_mount+0x439/0x510 [ 30.387609] ? copy_mount_string+0x40/0x40 [ 30.391208] ? fill_super+0x2310/0x2310 [ 30.395421] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 30.399383] ? alloc_pages_current+0x15d/0x260 [ 30.404366] ? copy_mnt_ns+0xa30/0xa30 [ 30.408924] ? __lockdep_init_map+0x100/0x560 [ 30.412785] ? copy_mount_options+0x1fa/0x2f0 [ 30.417273] mount_fs+0x92/0x2a0 [ 30.421742] ? copy_mnt_ns+0xa30/0xa30 [ 30.425087] vfs_kern_mount.part.0+0x5b/0x470 [ 30.428949] SyS_mount+0xa8/0x120 [ 30.433420] do_mount+0xe53/0x2a00 [ 30.436847] ? copy_mnt_ns+0xa30/0xa30 [ 30.440360] ? do_raw_spin_unlock+0x164/0x220 [ 30.444224] do_syscall_64+0x1d5/0x640 [ 30.448694] ? copy_mount_string+0x40/0x40 [ 30.452561] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 30.456774] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 30.461936] RIP: 0033:0x45a2fa [ 30.466965] ? copy_mnt_ns+0xa30/0xa30 [ 30.470130] RSP: 002b:00007ffc905eb098 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 [ 30.473995] ? copy_mount_options+0x1fa/0x2f0 [ 30.474002] ? copy_mnt_ns+0xa30/0xa30 [ 30.481685] RAX: ffffffffffffffda RBX: 00007ffc905eb0f0 RCX: 000000000045a2fa [ 30.486417] SyS_mount+0xa8/0x120 [ 30.490276] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffc905eb0b0 [ 30.497524] ? copy_mnt_ns+0xa30/0xa30 [ 30.500947] RBP: 00007ffc905eb0b0 R08: 00007ffc905eb0f0 R09: 0000000000000000 [ 30.508207] do_syscall_64+0x1d5/0x640 [ 30.512079] R10: 0000000000000000 R11: 0000000000000282 R12: 000000002000dca0 [ 30.519331] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 30.523190] R13: 0000000000000003 R14: 0000000000000004 R15: 000000000000091c [ 30.530440] RIP: 0033:0x45a2fa [ 30.535637] Code: [ 30.542892] RSP: 002b:00007ffc905eb098 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 [ 30.546069] bd [ 30.548209] RAX: ffffffffffffffda RBX: 00007ffc905eb0f0 RCX: 000000000045a2fa [ 30.555888] ea [ 30.557767] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffc905eb0b0 [ 30.565009] ff [ 30.566873] RBP: 00007ffc905eb0b0 R08: 00007ffc905eb0f0 R09: 0000000000000000 [ 30.574114] ff [ 30.575982] R10: 0000000000000000 R11: 0000000000000282 R12: 000000002000dca0 [ 30.583246] ff [ 30.585114] R13: 0000000000000003 R14: 0000000000000004 R15: 000000000000091c [ 30.592360] e9 c6 57 a1 fa 4c 89 ff e8 2b 8a 7c fa eb da e8 f4 e4 52 fa 4c 89 ea 48 89 ee 48 c7 c7 40 a9 95 87 e8 16 fc fe ff <0f> 0b 48 89 ef 5d 41 5c 41 5d e9 d3 5f 7c fa e8 ce e4 52 fa 4d [ 30.618802] ---[ end trace 1cf8d2630ea0534e ]--- [ 30.624314] Kernel Offset: disabled [ 30.627973] Rebooting in 86400 seconds..