[ 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 '10.128.0.194' (ECDSA) to the list of known hosts. syzkaller login: [ 30.337327] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 30.344015] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 30.345228] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 30.351833] ------------[ cut here ]------------ [ 30.360549] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 30.363118] WARNING: CPU: 1 PID: 7977 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 [ 30.363124] Kernel panic - not syncing: panic_on_warn set ... [ 30.363124] [ 30.363132] CPU: 1 PID: 7977 Comm: syz-executor992 Not tainted 4.14.302-syzkaller #0 [ 30.363136] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 30.363141] Call Trace: [ 30.372346] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 30.378154] dump_stack+0x1b2/0x281 [ 30.378165] panic+0x1f9/0x42d [ 30.378171] ? add_taint.cold+0x16/0x16 [ 30.378180] ? sysfs_warn_dup.cold+0x17/0x26 [ 30.378190] ? sysfs_warn_dup.cold+0x17/0x26 [ 30.378196] __warn.cold+0x20/0x44 [ 30.378204] ? ist_end_non_atomic+0x10/0x10 [ 30.378214] ? sysfs_warn_dup.cold+0x17/0x26 [ 30.403311] gfs2: fsid=syz:syz: Now mounting FS... [ 30.405339] report_bug+0x208/0x250 [ 30.405353] do_error_trap+0x195/0x2d0 [ 30.405360] ? math_error+0x2d0/0x2d0 [ 30.405367] ? ___preempt_schedule+0x16/0x18 [ 30.405378] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.405388] invalid_op+0x1b/0x40 [ 30.405397] RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 [ 30.405400] RSP: 0018:ffff88809581f728 EFLAGS: 00010282 [ 30.405407] RAX: 000000000000003a RBX: ffff8880955bdc10 RCX: 0000000000000000 [ 30.405414] RDX: 0000000000000000 RSI: ffffffff878bd020 RDI: ffffed1012b03edb [ 30.421825] ------------[ cut here ]------------ [ 30.424730] RBP: ffff8880955c0800 R08: 000000000000003a R09: 0000000000000000 [ 30.429128] WARNING: CPU: 0 PID: 7982 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 [ 30.433521] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b12b6380 [ 30.437034] Modules linked in: [ 30.441338] R13: ffff8880b39e1080 R14: ffff8880955bdc18 R15: ffff888095639b58 [ 30.450644] ? sysfs_warn_dup.cold+0x17/0x26 [ 30.454235] CPU: 0 PID: 7982 Comm: syz-executor992 Not tainted 4.14.302-syzkaller #0 [ 30.458107] sysfs_create_dir_ns+0x16f/0x1d0 [ 30.461876] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 30.466272] kobject_add_internal+0x28b/0x930 [ 30.471096] task: ffff8880b4b8e180 task.stack: ffff8880a97a8000 [ 30.474532] kobject_init_and_add+0xde/0x120 [ 30.479609] RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 [ 30.484944] ? kobject_create_and_add+0x200/0x200 [ 30.492185] RSP: 0018:ffff8880a97af728 EFLAGS: 00010282 [ 30.499525] ? vsnprintf+0x260/0x1340 [ 30.511625] gfs2_sys_fs_add+0x184/0x3f0 [ 30.524778] RAX: 000000000000003a RBX: ffff8880b2a79c50 RCX: 0000000000000000 [ 30.524787] RDX: 0000000000000000 RSI: ffffffff878bd020 RDI: ffffed10152f5edb [ 30.532060] ? recover_store+0x100/0x100 [ 30.535216] RBP: ffff8880b1a463c0 R08: 000000000000003a R09: 0000000000000001 [ 30.542510] ? snprintf+0xa5/0xd0 [ 30.546905] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b12b6380 [ 30.554781] ? strscpy+0x94/0x280 [ 30.559164] R13: ffff8880b40a4980 R14: ffff8880b2a79c58 R15: ffff888095739b98 [ 30.568496] fill_super+0x118b/0x2310 [ 30.572970] FS: 00005555556e5300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 30.579022] ? vsnprintf+0x260/0x1340 [ 30.583397] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.588389] ? gfs2_online_uevent+0x1b0/0x1b0 [ 30.593207] CR2: 00007f028f2ae020 CR3: 0000000098696000 CR4: 00000000003406f0 [ 30.598562] ? pointer+0x9e0/0x9e0 [ 30.602343] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.606381] ? snprintf+0xa5/0xd0 [ 30.613622] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.620875] ? vsprintf+0x30/0x30 [ 30.624907] Call Trace: [ 30.632165] ? gfs2_open+0x160/0x160 [ 30.635620] sysfs_create_dir_ns+0x16f/0x1d0 [ 30.643667] ? set_blocksize+0x125/0x380 [ 30.647101] kobject_add_internal+0x28b/0x930 [ 30.654436] gfs2_mount+0x439/0x510 [ 30.658223] kobject_init_and_add+0xde/0x120 [ 30.666421] ? fill_super+0x2310/0x2310 [ 30.670368] ? kobject_create_and_add+0x200/0x200 [ 30.676237] ? alloc_pages_current+0x15d/0x260 [ 30.680697] ? vsnprintf+0x260/0x1340 [ 30.688216] ? __lockdep_init_map+0x100/0x560 [ 30.688225] mount_fs+0x92/0x2a0 [ 30.691745] gfs2_sys_fs_add+0x184/0x3f0 [ 30.698994] vfs_kern_mount.part.0+0x5b/0x470 [ 30.702429] ? recover_store+0x100/0x100 [ 30.709695] do_mount+0xe65/0x2a30 [ 30.713119] ? snprintf+0xa5/0xd0 [ 30.715684] ? copy_mount_string+0x40/0x40 [ 30.719413] ? strscpy+0x94/0x280 [ 30.723871] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 30.727907] fill_super+0x118b/0x2310 [ 30.732374] ? copy_mnt_ns+0xa30/0xa30 [ 30.735975] ? vsnprintf+0x260/0x1340 [ 30.740357] ? copy_mount_options+0x1fa/0x2f0 [ 30.744303] ? gfs2_online_uevent+0x1b0/0x1b0 [ 30.749122] ? copy_mnt_ns+0xa30/0xa30 [ 30.753675] ? pointer+0x9e0/0x9e0 [ 30.757447] SyS_mount+0xa8/0x120 [ 30.761922] ? snprintf+0xa5/0xd0 [ 30.765260] ? copy_mnt_ns+0xa30/0xa30 [ 30.769293] ? vsprintf+0x30/0x30 [ 30.773763] do_syscall_64+0x1d5/0x640 [ 30.777799] ? gfs2_open+0x160/0x160 [ 30.781316] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 30.784741] ? set_blocksize+0x125/0x380 [ 30.788972] RIP: 0033:0x7fd819e916ba [ 30.792405] gfs2_mount+0x439/0x510 [ 30.797384] RSP: 002b:00007ffc93b61088 EFLAGS: 00000282 [ 30.801167] ? fill_super+0x2310/0x2310 [ 30.805033] ORIG_RAX: 00000000000000a5 [ 30.808824] ? alloc_pages_current+0x15d/0x260 [ 30.813293] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fd819e916ba [ 30.817773] ? __lockdep_init_map+0x100/0x560 [ 30.821804] RDX: 00000000200124c0 RSI: 0000000020000140 RDI: 00007ffc93b610a0 [ 30.825412] mount_fs+0x92/0x2a0 [ 30.828839] RBP: 00007ffc93b610a0 R08: 00007ffc93b610e0 R09: 0000000000000002 [ 30.832272] vfs_kern_mount.part.0+0x5b/0x470 [ 30.836160] R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000004 [ 30.839766] do_mount+0xe65/0x2a30 [ 30.843709] R13: 00005555556e52c0 R14: 0000000000000000 R15: 00007ffc93b610e0 [ 30.847408] ? do_raw_spin_unlock+0x164/0x220 [ 30.938682] ? copy_mount_string+0x40/0x40 [ 30.944213] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 30.949349] ? copy_mnt_ns+0xa30/0xa30 [ 30.953252] ? copy_mount_options+0x1fa/0x2f0 [ 30.957743] ? copy_mnt_ns+0xa30/0xa30 [ 30.961622] SyS_mount+0xa8/0x120 [ 30.965059] ? copy_mnt_ns+0xa30/0xa30 [ 30.968932] do_syscall_64+0x1d5/0x640 [ 30.972807] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 30.977982] RIP: 0033:0x7fd819e916ba [ 30.981686] RSP: 002b:00007ffc93b61088 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 [ 30.989380] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fd819e916ba [ 30.996633] RDX: 00000000200124c0 RSI: 0000000020000140 RDI: 00007ffc93b610a0 [ 31.006695] RBP: 00007ffc93b610a0 R08: 00007ffc93b610e0 R09: 0000000000000002 [ 31.014085] R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000004 [ 31.021360] R13: 00005555556e52c0 R14: 0000000000000000 R15: 00007ffc93b610e0 [ 31.028888] Code: bd ea ff ff ff e9 8f c2 9f fa 4c 89 ff e8 74 de 7a fa eb da e8 6d 1d 51 fa 4c 89 ea 48 89 ee 48 c7 c7 80 c4 95 87 e8 e5 fb fe ff <0f> 0b 48 89 ef 5d 41 5c 41 5d e9 4c b4 7a fa e8 47 1d 51 fa 4d [ 31.048345] ---[ end trace c81a5ed5172f7a1b ]--- [ 31.053145] Kernel Offset: disabled [ 31.057262] Rebooting in 86400 seconds..