[ 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 '10.128.0.43' (ECDSA) to the list of known hosts. syzkaller login: [ 34.300935] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 34.300943] gfs2: fsid=syz:syz: Trying to join cluster "lock_dlm", "syz:syz" [ 34.301131] ------------[ cut here ]------------ [ 34.309739] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 34.314933] WARNING: CPU: 1 PID: 7995 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 [ 34.314941] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 34.314941] [ 34.314952] CPU: 1 PID: 7995 Comm: syz-executor353 Not tainted 4.14.307-syzkaller #0 [ 34.314958] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 [ 34.314961] Call Trace: [ 34.314973] dump_stack+0x1b2/0x281 [ 34.314985] panic+0x21d/0x451 [ 34.314994] ? add_taint.cold+0x16/0x16 [ 34.315003] ? log_store.cold+0x16/0x16 [ 34.315016] ? sysfs_warn_dup.cold+0x17/0x26 [ 34.315025] check_panic_on_warn.cold+0x19/0x35 [ 34.315037] __warn+0xdf/0x1e0 [ 34.315047] ? ist_end_non_atomic+0x10/0x10 [ 34.315056] ? sysfs_warn_dup.cold+0x17/0x26 [ 34.315066] report_bug+0x208/0x250 [ 34.315079] do_error_trap+0x195/0x2d0 [ 34.315088] ? math_error+0x2d0/0x2d0 [ 34.315100] ? mark_held_locks+0xa6/0xf0 [ 34.315110] ? vprintk_emit+0x4e1/0x620 [ 34.315121] ? trace_hardirqs_on_caller+0x3a8/0x580 [ 34.315131] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.315145] invalid_op+0x1b/0x40 [ 34.315162] RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 [ 34.315168] RSP: 0018:ffff8880959a7728 EFLAGS: 00010282 [ 34.315178] RAX: 000000000000003a RBX: ffff8880b2815a90 RCX: 0000000000000000 [ 34.315184] RDX: 0000000000000000 RSI: ffff8880b33c6c08 RDI: ffffed1012b34edb [ 34.315190] RBP: ffff8880b2eb6300 R08: 000000000000003a R09: 0000000000000000 [ 34.315196] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888238f880e0 [ 34.315202] R13: ffff8880b02fe440 R14: ffff8880b2815a98 R15: ffff8880b29eda58 [ 34.315223] ? sysfs_warn_dup.cold+0x17/0x26 [ 34.315236] sysfs_create_dir_ns+0x16f/0x1d0 [ 34.332089] ------------[ cut here ]------------ [ 34.334915] kobject_add_internal+0x28b/0x930 [ 34.342958] WARNING: CPU: 0 PID: 8000 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 [ 34.350832] kobject_init_and_add+0xde/0x120 [ 34.360211] Modules linked in: [ 34.362794] ? kobject_create_and_add+0x200/0x200 [ 34.369688] ? vsnprintf+0x260/0x1340 [ 34.373643] CPU: 0 PID: 8000 Comm: syz-executor353 Not tainted 4.14.307-syzkaller #0 [ 34.377707] gfs2_sys_fs_add+0x184/0x3f0 [ 34.382102] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 [ 34.386847] ? recover_store+0x100/0x100 [ 34.390018] task: ffff8880b37aa4c0 task.stack: ffff8880b35b8000 [ 34.394330] ? snprintf+0xa5/0xd0 [ 34.398820] RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 [ 34.402432] ? strscpy+0x94/0x280 [ 34.406295] RSP: 0018:ffff8880b35bf728 EFLAGS: 00010282 [ 34.410092] fill_super+0x118b/0x2310 [ 34.418197] ? vsnprintf+0x260/0x1340 [ 34.423299] RAX: 000000000000003a RBX: ffff8880b2859ad0 RCX: 0000000000000000 [ 34.428135] ? gfs2_online_uevent+0x1b0/0x1b0 [ 34.431570] RDX: 0000000000000000 RSI: ffffffff878bd360 RDI: ffffed10166b7edb [ 34.436577] ? pointer+0x9e0/0x9e0 [ 34.441916] RBP: ffff8880b2d0a6c0 R08: 000000000000003a R09: 0000000000000001 [ 34.449182] ? snprintf+0xa5/0xd0 [ 34.457820] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888238f880e0 [ 34.465254] ? vsprintf+0x30/0x30 [ 34.472524] R13: ffff8880b330eb80 R14: ffff8880b2859ad8 R15: ffff8880b2815a98 [ 34.479784] ? gfs2_open+0x160/0x160 [ 34.484176] FS: 0000555557504300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 34.488571] ? set_blocksize+0x125/0x380 [ 34.493306] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 34.497792] gfs2_mount+0x439/0x510 [ 34.506098] CR2: 00007f9fa6b30010 CR3: 000000009da1d000 CR4: 00000000003406f0 [ 34.510505] ? fill_super+0x2310/0x2310 [ 34.513691] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.518537] ? alloc_pages_current+0x15d/0x260 [ 34.522317] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.530190] ? __lockdep_init_map+0x100/0x560 [ 34.534234] Call Trace: [ 34.543577] mount_fs+0x92/0x2a0 [ 34.547627] sysfs_create_dir_ns+0x16f/0x1d0 [ 34.553672] vfs_kern_mount.part.0+0x5b/0x470 [ 34.557109] kobject_add_internal+0x28b/0x930 [ 34.562113] do_mount+0xe65/0x2a30 [ 34.565556] kobject_init_and_add+0xde/0x120 [ 34.570901] ? retint_kernel+0x2d/0x2d [ 34.574686] ? kobject_create_and_add+0x200/0x200 [ 34.578473] ? copy_mount_string+0x40/0x40 [ 34.585729] ? vsnprintf+0x260/0x1340 [ 34.590208] ? memset+0x20/0x40 [ 34.597466] gfs2_sys_fs_add+0x184/0x3f0 [ 34.600986] ? copy_mount_options+0x1fa/0x2f0 [ 34.608244] ? recover_store+0x100/0x100 [ 34.611695] ? copy_mnt_ns+0xa30/0xa30 [ 34.618960] ? snprintf+0xa5/0xd0 [ 34.622413] SyS_mount+0xa8/0x120 [ 34.629673] ? strscpy+0x94/0x280 [ 34.633369] ? copy_mnt_ns+0xa30/0xa30 [ 34.641584] fill_super+0x118b/0x2310 [ 34.645627] do_syscall_64+0x1d5/0x640 [ 34.651499] ? vsnprintf+0x260/0x1340 [ 34.655109] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 34.662534] ? gfs2_online_uevent+0x1b0/0x1b0 [ 34.666488] RIP: 0033:0x7f8df0b8c6da [ 34.673751] ? pointer+0x9e0/0x9e0 [ 34.678312] RSP: 002b:00007ffd16935308 EFLAGS: 00000282 [ 34.685574] ? snprintf+0xa5/0xd0 [ 34.690045] ORIG_RAX: 00000000000000a5 [ 34.692634] ? vsprintf+0x30/0x30 [ 34.695997] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f8df0b8c6da [ 34.700411] ? gfs2_open+0x160/0x160 [ 34.704884] RDX: 0000000020013400 RSI: 0000000020013440 RDI: 00007ffd16935320 [ 34.709369] ? set_blocksize+0x125/0x380 [ 34.712890] RBP: 00007ffd16935320 R08: 00007ffd16935360 R09: 0000000000000002 [ 34.717289] gfs2_mount+0x439/0x510 [ 34.721241] R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000004 [ 34.726068] ? fill_super+0x2310/0x2310 [ 34.730288] R13: 00005555575042c0 R14: 0000000000000000 R15: 00007ffd16935360 [ 34.734098] ? alloc_pages_current+0x15d/0x260 [ 34.868728] ? __lockdep_init_map+0x100/0x560 [ 34.873222] mount_fs+0x92/0x2a0 [ 34.876588] vfs_kern_mount.part.0+0x5b/0x470 [ 34.881078] do_mount+0xe65/0x2a30 [ 34.884615] ? retint_kernel+0x2d/0x2d [ 34.888518] ? copy_mount_string+0x40/0x40 [ 34.892885] ? memset+0x20/0x40 [ 34.896167] ? copy_mount_options+0x1fa/0x2f0 [ 34.900853] ? copy_mnt_ns+0xa30/0xa30 [ 34.904847] SyS_mount+0xa8/0x120 [ 34.908312] ? copy_mnt_ns+0xa30/0xa30 [ 34.912219] do_syscall_64+0x1d5/0x640 [ 34.916211] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 34.921394] RIP: 0033:0x7f8df0b8c6da [ 34.925097] RSP: 002b:00007ffd16935308 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 [ 34.932818] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f8df0b8c6da [ 34.940174] RDX: 0000000020013400 RSI: 0000000020013440 RDI: 00007ffd16935320 [ 34.947436] RBP: 00007ffd16935320 R08: 00007ffd16935360 R09: 0000000000000002 [ 34.954719] R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000004 [ 34.961989] R13: 00005555575042c0 R14: 0000000000000000 R15: 00007ffd16935360 [ 34.969265] Code: bd ea ff ff ff e9 ff 95 9f fa 4c 89 ff e8 64 ae 7a fa eb da e8 ed ea 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 3c 84 7a fa e8 c7 ea 50 fa 4d [ 34.988496] ---[ end trace b8aa9b360bef8d92 ]--- [ 34.993488] Kernel Offset: disabled [ 34.997165] Rebooting in 86400 seconds..