[ OK ] Started OpenBSD Secure Shell server. [ 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. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.26' (ECDSA) to the list of known hosts. syzkaller login: [ 43.227844] gfs2: fsid=syz:syz: Trying to join cluster "lock_dlm", "syz:syz" [ 43.235997] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 43.249234] ------------[ cut here ]------------ [ 43.254041] WARNING: CPU: 0 PID: 7965 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 [ 43.262284] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 43.262284] [ 43.270414] CPU: 0 PID: 7965 Comm: syz-executor166 Not tainted 4.14.305-syzkaller #0 [ 43.278311] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 [ 43.287688] Call Trace: [ 43.290288] dump_stack+0x1b2/0x281 [ 43.293944] panic+0x21d/0x451 [ 43.297165] ? add_taint.cold+0x16/0x16 [ 43.301269] ? log_store.cold+0x16/0x16 [ 43.305282] ? sysfs_warn_dup.cold+0x17/0x26 [ 43.309717] check_panic_on_warn.cold+0x19/0x35 [ 43.314409] __warn+0xdf/0x1e0 [ 43.317645] ? ist_end_non_atomic+0x10/0x10 [ 43.321987] ? sysfs_warn_dup.cold+0x17/0x26 [ 43.326416] report_bug+0x208/0x250 [ 43.329621] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 43.330059] do_error_trap+0x195/0x2d0 [ 43.340627] ? math_error+0x2d0/0x2d0 [ 43.344446] ? ___preempt_schedule+0x16/0x18 [ 43.348873] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.353732] invalid_op+0x1b/0x40 [ 43.357195] RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 [ 43.359265] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 43.362214] RSP: 0018:ffff8880b3777728 EFLAGS: 00010282 [ 43.362225] RAX: 000000000000003a RBX: ffff8880954a9b50 RCX: 0000000000000000 [ 43.362232] RDX: 0000000000000000 RSI: ffffffff87cd1740 RDI: ffffed10166eeedb [ 43.362238] RBP: ffff8880b3270a00 R08: 000000000000003a R09: 0000000000000000 [ 43.362245] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b0ec77e0 [ 43.362250] R13: ffff8880b2d94c80 R14: ffff8880954a9b58 R15: ffff8880b28b5b98 [ 43.362276] ? sysfs_warn_dup.cold+0x17/0x26 [ 43.371685] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 43.374296] sysfs_create_dir_ns+0x16f/0x1d0 [ 43.374312] kobject_add_internal+0x28b/0x930 [ 43.374328] kobject_init_and_add+0xde/0x120 [ 43.393712] dlm: no local IP address has been set [ 43.396160] ? kobject_create_and_add+0x200/0x200 [ 43.396174] ? vsnprintf+0x260/0x1340 [ 43.396194] gfs2_sys_fs_add+0x184/0x3f0 [ 43.396208] ? recover_store+0x100/0x100 [ 43.405890] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 43.410806] ? snprintf+0xa5/0xd0 [ 43.410822] ? strscpy+0x94/0x280 [ 43.410837] fill_super+0x118b/0x2310 [ 43.418645] dlm: cannot start dlm lowcomms -107 [ 43.421909] ? vsnprintf+0x260/0x1340 [ 43.421927] ? gfs2_online_uevent+0x1b0/0x1b0 [ 43.436751] ------------[ cut here ]------------ [ 43.440069] ? pointer+0x9e0/0x9e0 [ 43.444912] WARNING: CPU: 1 PID: 7964 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 [ 43.448700] ? snprintf+0xa5/0xd0 [ 43.452738] Modules linked in: [ 43.456797] ? vsprintf+0x30/0x30 [ 43.466914] ? gfs2_open+0x160/0x160 [ 43.470372] CPU: 1 PID: 7964 Comm: syz-executor166 Not tainted 4.14.305-syzkaller #0 [ 43.474164] ? set_blocksize+0x125/0x380 [ 43.478818] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 [ 43.482615] gfs2_mount+0x439/0x510 [ 43.487094] task: ffff888098198400 task.stack: ffff888095d78000 [ 43.491863] ? fill_super+0x2310/0x2310 [ 43.495455] RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 [ 43.503691] ? alloc_pages_current+0x15d/0x260 [ 43.507108] RSP: 0018:ffff888095d7f728 EFLAGS: 00010282 [ 43.510315] ? __lockdep_init_map+0x100/0x560 [ 43.513760] RAX: 000000000000003a RBX: ffff8880b2c71c10 RCX: 0000000000000000 [ 43.517468] mount_fs+0x92/0x2a0 [ 43.525362] RDX: 0000000000000000 RSI: ffffffff878bd360 RDI: ffffed1012bafedb [ 43.529421] vfs_kern_mount.part.0+0x5b/0x470 [ 43.538757] RBP: ffff8880b28681c0 R08: 000000000000003a R09: 0000000000000001 [ 43.542377] do_mount+0xe65/0x2a30 [ 43.548414] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b0ec77e0 [ 43.552388] ? retint_kernel+0x2d/0x2d [ 43.557392] R13: ffff8880b4f6d200 R14: ffff8880b2c71c18 R15: ffff8880b2ecdbd8 [ 43.561968] ? copy_mount_string+0x40/0x40 [ 43.567318] FS: 0000555556952300(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 [ 43.571804] ? memset+0x20/0x40 [ 43.579071] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 43.582429] ? copy_mount_options+0x1fa/0x2f0 [ 43.589688] CR2: 0000561d6d977000 CR3: 00000000b02f3000 CR4: 00000000003406e0 [ 43.594182] ? copy_mnt_ns+0xa30/0xa30 [ 43.601439] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 43.604973] SyS_mount+0xa8/0x120 [ 43.612361] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 43.616241] ? copy_mnt_ns+0xa30/0xa30 [ 43.623494] Call Trace: [ 43.627724] do_syscall_64+0x1d5/0x640 [ 43.635943] sysfs_create_dir_ns+0x16f/0x1d0 [ 43.639225] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 43.645093] kobject_add_internal+0x28b/0x930 [ 43.649576] RIP: 0033:0x7f4a0e52f6da [ 43.656846] kobject_init_and_add+0xde/0x120 [ 43.660718] RSP: 002b:00007ffcaaa0e468 EFLAGS: 00000282 [ 43.667995] ? kobject_create_and_add+0x200/0x200 [ 43.671437] ORIG_RAX: 00000000000000a5 [ 43.678697] ? vsnprintf+0x260/0x1340 [ 43.682568] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f4a0e52f6da [ 43.685154] gfs2_sys_fs_add+0x184/0x3f0 [ 43.689020] RDX: 000000002003b280 RSI: 000000002003b2c0 RDI: 00007ffcaaa0e480 [ 43.693420] ? recover_store+0x100/0x100 [ 43.698592] RBP: 00007ffcaaa0e480 R08: 00007ffcaaa0e4c0 R09: 0000000000000002 [ 43.703081] ? snprintf+0xa5/0xd0 [ 43.706780] R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000004 [ 43.711180] ? strscpy+0x94/0x280 [ 43.716525] R13: 00005555569522c0 R14: 0000000000000000 R15: 00007ffcaaa0e4c0 [ 43.780419] fill_super+0x118b/0x2310 [ 43.784316] ? vsnprintf+0x260/0x1340 [ 43.788116] ? gfs2_online_uevent+0x1b0/0x1b0 [ 43.792611] ? pointer+0x9e0/0x9e0 [ 43.796155] ? snprintf+0xa5/0xd0 [ 43.799608] ? vsprintf+0x30/0x30 [ 43.803058] ? gfs2_open+0x160/0x160 [ 43.806776] ? set_blocksize+0x125/0x380 [ 43.810838] gfs2_mount+0x439/0x510 [ 43.814465] ? fill_super+0x2310/0x2310 [ 43.818455] ? alloc_pages_current+0x15d/0x260 [ 43.823035] ? __lockdep_init_map+0x100/0x560 [ 43.827531] mount_fs+0x92/0x2a0 [ 43.830898] vfs_kern_mount.part.0+0x5b/0x470 [ 43.835396] do_mount+0xe65/0x2a30 [ 43.838938] ? retint_kernel+0x2d/0x2d [ 43.842827] ? copy_mount_string+0x40/0x40 [ 43.847065] ? memset+0x20/0x40 [ 43.850342] ? copy_mount_options+0x1fa/0x2f0 [ 43.854837] ? copy_mnt_ns+0xa30/0xa30 [ 43.858722] SyS_mount+0xa8/0x120 [ 43.862173] ? copy_mnt_ns+0xa30/0xa30 [ 43.866058] do_syscall_64+0x1d5/0x640 [ 43.869948] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 43.875138] RIP: 0033:0x7f4a0e52f6da [ 43.878846] RSP: 002b:00007ffcaaa0e468 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 [ 43.886554] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f4a0e52f6da [ 43.893910] RDX: 000000002003b280 RSI: 000000002003b2c0 RDI: 00007ffcaaa0e480 [ 43.901177] RBP: 00007ffcaaa0e480 R08: 00007ffcaaa0e4c0 R09: 0000000000000002 [ 43.908445] R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000004 [ 43.915726] R13: 00005555569522c0 R14: 0000000000000000 R15: 00007ffcaaa0e4c0 [ 43.923017] Code: bd ea ff ff ff e9 4f 9c 9f fa 4c 89 ff e8 b4 b6 7a fa eb da e8 fd f3 50 fa 4c 89 ea 48 89 ee 48 c7 c7 80 c8 95 87 e8 fd fb fe ff <0f> 0b 48 89 ef 5d 41 5c 41 5d e9 8c 8c 7a fa e8 d7 f3 50 fa 4d [ 43.942273] ---[ end trace 2c005640373d26d9 ]--- [ 43.947096] Kernel Offset: disabled [ 43.950766] Rebooting in 86400 seconds..