[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.204' (ECDSA) to the list of known hosts. syzkaller login: [ 30.004456] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 30.020233] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 30.032029] ------------[ cut here ]------------ [ 30.036824] WARNING: CPU: 0 PID: 7982 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 [ 30.045131] Kernel panic - not syncing: panic_on_warn set ... [ 30.045131] [ 30.052491] CPU: 0 PID: 7982 Comm: syz-executor329 Not tainted 4.14.302-syzkaller #0 [ 30.060699] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 30.070119] Call Trace: [ 30.072780] dump_stack+0x1b2/0x281 [ 30.076404] panic+0x1f9/0x42d [ 30.079580] ? add_taint.cold+0x16/0x16 [ 30.083556] ? sysfs_warn_dup.cold+0x17/0x26 [ 30.088042] ? sysfs_warn_dup.cold+0x17/0x26 [ 30.092432] __warn.cold+0x20/0x44 [ 30.095951] ? ist_end_non_atomic+0x10/0x10 [ 30.100250] ? sysfs_warn_dup.cold+0x17/0x26 [ 30.104635] report_bug+0x208/0x250 [ 30.108240] do_error_trap+0x195/0x2d0 [ 30.112106] ? math_error+0x2d0/0x2d0 [ 30.115886] ? ___preempt_schedule+0x16/0x18 [ 30.120276] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.125109] invalid_op+0x1b/0x40 [ 30.128542] RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 [ 30.133534] RSP: 0018:ffff8880b34ef728 EFLAGS: 00010282 [ 30.138874] RAX: 000000000000003a RBX: ffff888095521e10 RCX: 0000000000000000 [ 30.146122] RDX: 0000000000000000 RSI: ffffffff878bd020 RDI: ffffed101669dedb [ 30.153381] RBP: ffff8880954e06c0 R08: 000000000000003a R09: 0000000000000000 [ 30.160630] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b0ffad20 [ 30.167884] R13: ffff8880af60b7c0 R14: ffff888095521e18 R15: ffff888095451dd8 [ 30.175323] ? sysfs_warn_dup.cold+0x17/0x26 [ 30.179801] sysfs_create_dir_ns+0x16f/0x1d0 [ 30.184188] kobject_add_internal+0x28b/0x930 [ 30.188663] kobject_init_and_add+0xde/0x120 [ 30.193050] ? kobject_create_and_add+0x200/0x200 [ 30.197872] ? vsnprintf+0x260/0x1340 [ 30.201757] gfs2_sys_fs_add+0x184/0x3f0 [ 30.205794] ? recover_store+0x100/0x100 [ 30.209834] ? snprintf+0xa5/0xd0 [ 30.213290] ? strscpy+0x94/0x280 [ 30.216750] fill_super+0x118b/0x2310 [ 30.220529] ? vsnprintf+0x260/0x1340 [ 30.224323] ? gfs2_online_uevent+0x1b0/0x1b0 [ 30.228797] ? pointer+0x9e0/0x9e0 [ 30.232316] ? snprintf+0xa5/0xd0 [ 30.235746] ? vsprintf+0x30/0x30 [ 30.239179] ? set_blocksize+0x125/0x380 [ 30.243304] gfs2_mount+0x439/0x510 [ 30.246911] ? fill_super+0x2310/0x2310 [ 30.250875] ? alloc_pages_current+0x15d/0x260 [ 30.255437] ? __lockdep_init_map+0x100/0x560 [ 30.259911] mount_fs+0x92/0x2a0 [ 30.263259] vfs_kern_mount.part.0+0x5b/0x470 [ 30.267735] do_mount+0xe65/0x2a30 [ 30.271257] ? copy_mount_string+0x40/0x40 [ 30.275477] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 30.280470] ? copy_mnt_ns+0xa30/0xa30 [ 30.284336] ? copy_mount_options+0x1fa/0x2f0 [ 30.288808] ? copy_mnt_ns+0xa30/0xa30 [ 30.292710] SyS_mount+0xa8/0x120 [ 30.296140] ? copy_mnt_ns+0xa30/0xa30 [ 30.300007] do_syscall_64+0x1d5/0x640 [ 30.303875] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 30.309041] RIP: 0033:0x7f21c234798a [ 30.312729] RSP: 002b:00007fff4b0ec6c8 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 [ 30.320420] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f21c234798a [ 30.327674] RDX: 0000000020000000 RSI: 000000002001f6c0 RDI: 00007fff4b0ec6e0 [ 30.334922] RBP: 00007fff4b0ec6e0 R08: 00007fff4b0ec720 R09: 0000000000000002 [ 30.342189] R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000004 [ 30.349440] R13: 0000555555e812c0 R14: 0000000000000000 R15: 00007fff4b0ec720 [ 30.357056] Kernel Offset: disabled [ 30.360711] Rebooting in 86400 seconds..