[ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ 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. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.37' (ECDSA) to the list of known hosts. syzkaller login: [ 28.284589] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 28.289561] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 28.305085] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 28.326797] ------------[ cut here ]------------ [ 28.328301] gfs2: fsid=syz:syz: Now mounting FS... [ 28.332297] WARNING: CPU: 1 PID: 8001 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 [ 28.332304] Kernel panic - not syncing: panic_on_warn set ... [ 28.332304] [ 28.332312] CPU: 1 PID: 8001 Comm: syz-executor267 Not tainted 4.14.302-syzkaller #0 [ 28.332319] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 28.354074] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 28.354305] Call Trace: [ 28.354319] dump_stack+0x1b2/0x281 [ 28.354330] panic+0x1f9/0x42d [ 28.354336] ? add_taint.cold+0x16/0x16 [ 28.354347] ? sysfs_warn_dup.cold+0x17/0x26 [ 28.370193] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 28.372184] ? sysfs_warn_dup.cold+0x17/0x26 [ 28.372192] __warn.cold+0x20/0x44 [ 28.372201] ? ist_end_non_atomic+0x10/0x10 [ 28.372209] ? sysfs_warn_dup.cold+0x17/0x26 [ 28.419972] report_bug+0x208/0x250 [ 28.423583] do_error_trap+0x195/0x2d0 [ 28.427449] ? math_error+0x2d0/0x2d0 [ 28.431232] ? ___preempt_schedule+0x16/0x18 [ 28.435619] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.440441] invalid_op+0x1b/0x40 [ 28.443870] RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 [ 28.448861] RSP: 0018:ffff88809d367728 EFLAGS: 00010282 [ 28.454206] RAX: 000000000000003a RBX: ffff8880a5981950 RCX: 0000000000000000 [ 28.461541] RDX: 0000000000000000 RSI: ffffffff878bd020 RDI: ffffed1013a6cedb [ 28.468787] RBP: ffff8880b18723c0 R08: 000000000000003a R09: 0000000000000000 [ 28.476032] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8882393e27e0 [ 28.483280] R13: ffff8880b0092780 R14: ffff8880a5981958 R15: ffff8880a5945998 [ 28.490539] ? sysfs_warn_dup.cold+0x17/0x26 [ 28.494925] sysfs_create_dir_ns+0x16f/0x1d0 [ 28.499311] kobject_add_internal+0x28b/0x930 [ 28.503784] kobject_init_and_add+0xde/0x120 [ 28.508172] ? kobject_create_and_add+0x200/0x200 [ 28.512993] ? vsnprintf+0x260/0x1340 [ 28.516775] gfs2_sys_fs_add+0x184/0x3f0 [ 28.520816] ? recover_store+0x100/0x100 [ 28.524863] ? snprintf+0xa5/0xd0 [ 28.528295] ? strscpy+0x94/0x280 [ 28.531728] fill_super+0x118b/0x2310 [ 28.535507] ? vsnprintf+0x260/0x1340 [ 28.539371] ? gfs2_online_uevent+0x1b0/0x1b0 [ 28.543885] ? pointer+0x9e0/0x9e0 [ 28.547403] ? snprintf+0xa5/0xd0 [ 28.550833] ? vsprintf+0x30/0x30 [ 28.554351] ? gfs2_open+0x160/0x160 [ 28.558040] ? set_blocksize+0x125/0x380 [ 28.562080] gfs2_mount+0x439/0x510 [ 28.565683] ? fill_super+0x2310/0x2310 [ 28.569648] ? alloc_pages_current+0x15d/0x260 [ 28.574211] ? __lockdep_init_map+0x100/0x560 [ 28.578683] mount_fs+0x92/0x2a0 [ 28.582030] vfs_kern_mount.part.0+0x5b/0x470 [ 28.586503] do_mount+0xe65/0x2a30 [ 28.590023] ? retint_kernel+0x2d/0x2d [ 28.593889] ? copy_mount_string+0x40/0x40 [ 28.598101] ? memset+0x20/0x40 [ 28.601358] ? copy_mount_options+0x1fa/0x2f0 [ 28.605826] ? copy_mnt_ns+0xa30/0xa30 [ 28.609690] SyS_mount+0xa8/0x120 [ 28.613117] ? copy_mnt_ns+0xa30/0xa30 [ 28.616986] do_syscall_64+0x1d5/0x640 [ 28.621036] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 28.626204] RIP: 0033:0x7f9f201ad6ba [ 28.629895] RSP: 002b:00007ffc931277f8 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 [ 28.637581] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f9f201ad6ba [ 28.644827] RDX: 0000000020037f40 RSI: 0000000020037f80 RDI: 00007ffc93127810 [ 28.652076] RBP: 00007ffc93127810 R08: 00007ffc93127850 R09: 0000000000000002 [ 28.659936] R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000004 [ 28.667198] R13: 00005555559572c0 R14: 0000000000000000 R15: 00007ffc93127850 [ 28.674670] Kernel Offset: disabled [ 28.678493] Rebooting in 86400 seconds..