[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.131' (ECDSA) to the list of known hosts. syzkaller login: [ 36.240828] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 36.242821] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 36.253671] ------------[ cut here ]------------ [ 36.260046] WARNING: CPU: 0 PID: 8013 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 [ 36.268367] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 36.268367] [ 36.276632] CPU: 0 PID: 8013 Comm: syz-executor322 Not tainted 4.14.307-syzkaller #0 [ 36.284537] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 [ 36.293897] Call Trace: [ 36.296499] dump_stack+0x1b2/0x281 [ 36.300142] panic+0x21d/0x451 [ 36.303353] ? add_taint.cold+0x16/0x16 [ 36.307368] ? log_store.cold+0x16/0x16 [ 36.311366] ? sysfs_warn_dup.cold+0x17/0x26 [ 36.312495] gfs2: fsid=syz:syz: Now mounting FS... [ 36.315780] check_panic_on_warn.cold+0x19/0x35 [ 36.315794] __warn+0xdf/0x1e0 [ 36.315806] ? ist_end_non_atomic+0x10/0x10 [ 36.315819] ? sysfs_warn_dup.cold+0x17/0x26 [ 36.337518] report_bug+0x208/0x250 [ 36.341252] do_error_trap+0x195/0x2d0 [ 36.345141] ? math_error+0x2d0/0x2d0 [ 36.349018] ? ___preempt_schedule+0x16/0x18 [ 36.353423] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.358266] invalid_op+0x1b/0x40 [ 36.361714] RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 [ 36.366726] RSP: 0018:ffff8880b3af7728 EFLAGS: 00010282 [ 36.372080] RAX: 000000000000003a RBX: ffff8880954e1b90 RCX: 0000000000000000 [ 36.379425] RDX: 0000000000000000 RSI: ffffffff878bd360 RDI: ffffed101675eedb [ 36.386686] RBP: ffff8880b289c1c0 R08: 000000000000003a R09: 0000000000000000 [ 36.393944] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8882388a09a0 [ 36.401218] R13: ffff8880b4676800 R14: ffff8880954e1b98 R15: ffff888095555b58 [ 36.408506] ? sysfs_warn_dup.cold+0x17/0x26 [ 36.412908] sysfs_create_dir_ns+0x16f/0x1d0 [ 36.417422] kobject_add_internal+0x28b/0x930 [ 36.421925] kobject_init_and_add+0xde/0x120 [ 36.426415] ? kobject_create_and_add+0x200/0x200 [ 36.431256] ? vsnprintf+0x260/0x1340 [ 36.435061] gfs2_sys_fs_add+0x184/0x3f0 [ 36.439118] ? recover_store+0x100/0x100 [ 36.443349] ? snprintf+0xa5/0xd0 [ 36.446823] ? strscpy+0x94/0x280 [ 36.450277] fill_super+0x118b/0x2310 [ 36.454100] ? vsnprintf+0x260/0x1340 [ 36.457911] ? gfs2_online_uevent+0x1b0/0x1b0 [ 36.462404] ? pointer+0x9e0/0x9e0 [ 36.465940] ? snprintf+0xa5/0xd0 [ 36.469413] ? vsprintf+0x30/0x30 [ 36.472947] ? gfs2_open+0x160/0x160 [ 36.476741] ? set_blocksize+0x125/0x380 [ 36.480797] gfs2_mount+0x439/0x510 [ 36.484419] ? fill_super+0x2310/0x2310 [ 36.488587] ? alloc_pages_current+0x15d/0x260 [ 36.493164] ? __lockdep_init_map+0x100/0x560 [ 36.497658] mount_fs+0x92/0x2a0 [ 36.501195] vfs_kern_mount.part.0+0x5b/0x470 [ 36.505695] do_mount+0xe65/0x2a30 [ 36.509233] ? retint_kernel+0x2d/0x2d [ 36.513223] ? copy_mount_string+0x40/0x40 [ 36.517477] ? memset+0x20/0x40 [ 36.520773] ? copy_mount_options+0x1fa/0x2f0 [ 36.525260] ? copy_mnt_ns+0xa30/0xa30 [ 36.529141] SyS_mount+0xa8/0x120 [ 36.532589] ? copy_mnt_ns+0xa30/0xa30 [ 36.536471] do_syscall_64+0x1d5/0x640 [ 36.540356] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 36.546027] RIP: 0033:0x7f484323971a [ 36.549817] RSP: 002b:00007ffc4b4f6108 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 [ 36.557638] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f484323971a [ 36.565075] RDX: 0000000020000100 RSI: 0000000020000000 RDI: 00007ffc4b4f6120 [ 36.572462] RBP: 00007ffc4b4f6120 R08: 00007ffc4b4f6160 R09: 0000000000000002 [ 36.579898] R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000004 [ 36.587265] R13: 00005555572142c0 R14: 0000000000000000 R15: 00007ffc4b4f6160 [ 36.594957] Kernel Offset: disabled [ 36.598642] Rebooting in 86400 seconds..