[ 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 '10.128.0.207' (ECDSA) to the list of known hosts. syzkaller login: [ 31.444095] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 31.460954] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 31.484043] ------------[ cut here ]------------ [ 31.484844] gfs2: fsid=syz:syz: Now mounting FS... [ 31.488821] WARNING: CPU: 1 PID: 7977 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 [ 31.488826] Kernel panic - not syncing: panic_on_warn set ... [ 31.488826] [ 31.488834] CPU: 1 PID: 7977 Comm: syz-executor224 Not tainted 4.14.302-syzkaller #0 [ 31.488838] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 31.488841] Call Trace: [ 31.488851] dump_stack+0x1b2/0x281 [ 31.488860] panic+0x1f9/0x42d [ 31.488866] ? add_taint.cold+0x16/0x16 [ 31.488877] ? sysfs_warn_dup.cold+0x17/0x26 [ 31.488887] ? sysfs_warn_dup.cold+0x17/0x26 [ 31.488900] __warn.cold+0x20/0x44 [ 31.488909] ? ist_end_non_atomic+0x10/0x10 [ 31.488916] ? sysfs_warn_dup.cold+0x17/0x26 [ 31.488924] report_bug+0x208/0x250 [ 31.488935] do_error_trap+0x195/0x2d0 [ 31.488942] ? math_error+0x2d0/0x2d0 [ 31.488951] ? ___preempt_schedule+0x16/0x18 [ 31.576724] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.581562] invalid_op+0x1b/0x40 [ 31.584995] RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 [ 31.589991] RSP: 0018:ffff8880b3767728 EFLAGS: 00010282 [ 31.595330] RAX: 000000000000003a RBX: ffff888095561990 RCX: 0000000000000000 [ 31.602583] RDX: 0000000000000000 RSI: ffffffff878bd020 RDI: ffffed10166ecedb [ 31.609826] RBP: ffff88809561e540 R08: 000000000000003a R09: 0000000000000000 [ 31.617068] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8882393191c0 [ 31.624333] R13: ffff8880b126c840 R14: ffff888095561998 R15: ffff888095009958 [ 31.631592] ? sysfs_warn_dup.cold+0x17/0x26 [ 31.635976] sysfs_create_dir_ns+0x16f/0x1d0 [ 31.640360] kobject_add_internal+0x28b/0x930 [ 31.644835] kobject_init_and_add+0xde/0x120 [ 31.649220] ? kobject_create_and_add+0x200/0x200 [ 31.654044] ? vsnprintf+0x260/0x1340 [ 31.657827] gfs2_sys_fs_add+0x184/0x3f0 [ 31.661864] ? recover_store+0x100/0x100 [ 31.665905] ? snprintf+0xa5/0xd0 [ 31.669340] ? strscpy+0x94/0x280 [ 31.672773] fill_super+0x118b/0x2310 [ 31.676552] ? vsnprintf+0x260/0x1340 [ 31.680339] ? gfs2_online_uevent+0x1b0/0x1b0 [ 31.684807] ? pointer+0x9e0/0x9e0 [ 31.688323] ? snprintf+0xa5/0xd0 [ 31.691749] ? vsprintf+0x30/0x30 [ 31.695178] ? gfs2_open+0x160/0x160 [ 31.698867] ? set_blocksize+0x125/0x380 [ 31.702991] gfs2_mount+0x439/0x510 [ 31.706616] ? fill_super+0x2310/0x2310 [ 31.710575] ? alloc_pages_current+0x15d/0x260 [ 31.715230] ? __lockdep_init_map+0x100/0x560 [ 31.719723] mount_fs+0x92/0x2a0 [ 31.723070] vfs_kern_mount.part.0+0x5b/0x470 [ 31.727551] do_mount+0xe65/0x2a30 [ 31.731255] ? retint_kernel+0x2d/0x2d [ 31.735121] ? copy_mount_string+0x40/0x40 [ 31.739350] ? copy_mount_options+0x188/0x2f0 [ 31.743820] ? copy_mount_options+0x1fa/0x2f0 [ 31.748291] ? copy_mnt_ns+0xa30/0xa30 [ 31.752157] SyS_mount+0xa8/0x120 [ 31.755588] ? copy_mnt_ns+0xa30/0xa30 [ 31.759457] do_syscall_64+0x1d5/0x640 [ 31.763335] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 31.768504] RIP: 0033:0x7fe7ac6d86ba [ 31.772192] RSP: 002b:00007fffdc9291d8 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 [ 31.779875] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fe7ac6d86ba [ 31.787131] RDX: 0000000020037f40 RSI: 0000000020037f80 RDI: 00007fffdc9291f0 [ 31.794376] RBP: 00007fffdc9291f0 R08: 00007fffdc929230 R09: 0000000000000002 [ 31.801620] R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000004 [ 31.808866] R13: 0000555556c512c0 R14: 0000000000000000 R15: 00007fffdc929230 [ 31.816421] Kernel Offset: disabled [ 31.820072] Rebooting in 86400 seconds..