[ 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 '10.128.1.57' (ECDSA) to the list of known hosts. syzkaller login: [ 31.939063] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 31.941774] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 31.946802] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 31.961006] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 31.977435] ------------[ cut here ]------------ [ 31.982220] WARNING: CPU: 0 PID: 7992 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 [ 31.982408] gfs2: fsid=syz:syz: Now mounting FS... [ 31.990432] Kernel panic - not syncing: panic_on_warn set ... [ 31.990432] [ 31.990441] CPU: 0 PID: 7992 Comm: syz-executor365 Not tainted 4.14.300-syzkaller #0 [ 31.990445] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 31.990448] Call Trace: [ 31.990464] dump_stack+0x1b2/0x281 [ 31.990473] panic+0x1f9/0x42d [ 31.990479] ? add_taint.cold+0x16/0x16 [ 31.990489] ? sysfs_warn_dup.cold+0x17/0x26 [ 31.990496] ? sysfs_warn_dup.cold+0x17/0x26 [ 31.990502] __warn.cold+0x20/0x44 [ 31.990511] ? ist_end_non_atomic+0x10/0x10 [ 31.990518] ? sysfs_warn_dup.cold+0x17/0x26 [ 31.990531] report_bug+0x208/0x250 [ 32.019121] ------------[ cut here ]------------ [ 32.020089] do_error_trap+0x195/0x2d0 [ 32.022660] WARNING: CPU: 1 PID: 7996 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 [ 32.026252] ? math_error+0x2d0/0x2d0 [ 32.029411] Modules linked in: [ 32.033362] ? ___preempt_schedule+0x16/0x18 [ 32.042296] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.045806] CPU: 1 PID: 7996 Comm: syz-executor365 Not tainted 4.14.300-syzkaller #0 [ 32.050100] invalid_op+0x1b/0x40 [ 32.054473] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 32.058080] ? sysfs_warn_dup.cold+0x17/0x26 [ 32.062801] task: ffff8880a00ae380 task.stack: ffff88809a978000 [ 32.066662] ? sysfs_warn_dup.cold+0x17/0x26 [ 32.074872] RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 [ 32.078641] ? sysfs_create_dir_ns+0x16f/0x1d0 [ 32.081802] RSP: 0018:ffff88809a97f728 EFLAGS: 00010282 [ 32.086183] ? kobject_add_internal+0x28b/0x930 [ 32.098849] ? kobject_init_and_add+0xde/0x120 [ 32.102266] RAX: 000000000000003a RBX: ffff88809574db90 RCX: 0000000000000000 [ 32.102272] RDX: 0000000000000000 RSI: ffffffff878bd060 RDI: ffffed101352fedb [ 32.111601] ? kobject_create_and_add+0x200/0x200 [ 32.115979] RBP: ffff8880b1970440 R08: 000000000000003a R09: 0000000000000000 [ 32.122010] ? vsnprintf+0x260/0x1340 [ 32.126384] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8882392edd20 [ 32.131377] ? gfs2_sys_fs_add+0x184/0x3f0 [ 32.137921] R13: ffff8880af6eef40 R14: ffff88809574db98 R15: ffff888095009c18 [ 32.143257] ? recover_store+0x100/0x100 [ 32.147894] FS: 00005555574a5300(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 [ 32.152451] ? snprintf+0xa5/0xd0 [ 32.159782] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 32.167042] ? strscpy+0x94/0x280 [ 32.171850] CR2: 00007f398752ff04 CR3: 00000000a89b5000 CR4: 00000000003406e0 [ 32.179096] ? fill_super+0x118b/0x2310 [ 32.182865] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 32.190115] ? vsnprintf+0x260/0x1340 [ 32.194324] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 32.201575] ? gfs2_online_uevent+0x1b0/0x1b0 [ 32.205603] Call Trace: [ 32.213823] ? pointer+0x9e0/0x9e0 [ 32.217250] sysfs_create_dir_ns+0x16f/0x1d0 [ 32.223102] ? snprintf+0xa5/0xd0 [ 32.226531] kobject_add_internal+0x28b/0x930 [ 32.233773] ? vsprintf+0x30/0x30 [ 32.237719] kobject_init_and_add+0xde/0x120 [ 32.244968] ? gfs2_open+0x160/0x160 [ 32.248737] ? kobject_create_and_add+0x200/0x200 [ 32.255979] ? set_blocksize+0x125/0x380 [ 32.260445] ? vsnprintf+0x260/0x1340 [ 32.263028] ? gfs2_mount+0x439/0x510 [ 32.266557] gfs2_sys_fs_add+0x184/0x3f0 [ 32.270933] ? fill_super+0x2310/0x2310 [ 32.274444] ? recover_store+0x100/0x100 [ 32.278923] ? alloc_pages_current+0x15d/0x260 [ 32.282352] ? snprintf+0xa5/0xd0 [ 32.286732] ? __lockdep_init_map+0x100/0x560 [ 32.290420] ? strscpy+0x94/0x280 [ 32.295232] ? mount_fs+0x92/0x2a0 [ 32.299267] fill_super+0x118b/0x2310 [ 32.303039] ? vfs_kern_mount.part.0+0x5b/0x470 [ 32.306811] ? vsnprintf+0x260/0x1340 [ 32.310845] ? do_mount+0xe65/0x2a30 [ 32.314790] ? gfs2_online_uevent+0x1b0/0x1b0 [ 32.318831] ? retint_kernel+0x2d/0x2d [ 32.323387] ? pointer+0x9e0/0x9e0 [ 32.326812] ? copy_mount_string+0x40/0x40 [ 32.331279] ? snprintf+0xa5/0xd0 [ 32.334703] ? copy_mount_options+0x197/0x2f0 [ 32.338212] ? vsprintf+0x30/0x30 [ 32.341986] ? copy_mount_options+0x1fa/0x2f0 [ 32.346625] ? gfs2_open+0x160/0x160 [ 32.350395] ? copy_mnt_ns+0xa30/0xa30 [ 32.354085] ? set_blocksize+0x125/0x380 [ 32.358550] ? SyS_mount+0xa8/0x120 [ 32.362409] gfs2_mount+0x439/0x510 [ 32.365917] ? copy_mnt_ns+0xa30/0xa30 [ 32.370122] ? fill_super+0x2310/0x2310 [ 32.373548] ? do_syscall_64+0x1d5/0x640 [ 32.378027] ? alloc_pages_current+0x15d/0x260 [ 32.381442] ? entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 32.385910] ? __lockdep_init_map+0x100/0x560 [ 32.430977] mount_fs+0x92/0x2a0 [ 32.434333] vfs_kern_mount.part.0+0x5b/0x470 [ 32.438811] do_mount+0xe65/0x2a30 [ 32.442337] ? retint_kernel+0x2d/0x2d [ 32.446208] ? copy_mount_string+0x40/0x40 [ 32.450426] ? copy_mount_options+0x188/0x2f0 [ 32.454910] ? copy_mount_options+0x1fa/0x2f0 [ 32.459387] ? copy_mnt_ns+0xa30/0xa30 [ 32.463257] SyS_mount+0xa8/0x120 [ 32.466690] ? copy_mnt_ns+0xa30/0xa30 [ 32.470561] do_syscall_64+0x1d5/0x640 [ 32.474433] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 32.479607] Code: bd ea ff ff ff e9 69 d3 9f fa 4c 89 ff e8 be ed 7a fa eb da e8 f7 2f 51 fa 4c 89 ea 48 89 ee 48 c7 c7 c0 c4 95 87 e8 04 fc fe ff <0f> 0b 48 89 ef 5d 41 5c 41 5d e9 96 c3 7a fa e8 d1 2f 51 fa 4d [ 32.498791] ---[ end trace 68c8b5139e79f0e6 ]--- [ 32.503816] Kernel Offset: disabled [ 32.507477] Rebooting in 86400 seconds..