gfs2: fsid=syz:syz: Now mounting FS... sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' ------------[ cut here ]------------ ------------[ cut here ]------------ WARNING: CPU: 0 PID: 6390 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x2d fs/sysfs/dir.c:30 WARNING: CPU: 1 PID: 6394 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x2d fs/sysfs/dir.c:30 Kernel panic - not syncing: panic_on_warn set ... Modules linked in: CPU: 0 PID: 6390 Comm: syz-executor337 Not tainted 4.14.198-syzkaller #0 CPU: 1 PID: 6394 Comm: syz-executor337 Not tainted 4.14.198-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: task: ffff8880982be0c0 task.stack: ffff88808b4e8000 __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x283 lib/dump_stack.c:58 RIP: 0010:sysfs_warn_dup.cold+0x17/0x2d fs/sysfs/dir.c:30 panic+0x1f9/0x42d kernel/panic.c:183 RSP: 0018:ffff88808b4ef728 EFLAGS: 00010282 RAX: 000000000000003a RBX: ffff8880968b0990 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff86ac12c0 RDI: ffffed101169dedb RBP: ffff888085882740 R08: 000000000000003a R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88821954f0e0 __warn.cold+0x20/0x4b kernel/panic.c:547 R13: ffff888092505e40 R14: ffff8880968b09b0 R15: ffff8880968d08d8 FS: 0000000002465880(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3c35f98000 CR3: 00000000a783c000 CR4: 00000000001406e0 report_bug+0x208/0x249 lib/bug.c:186 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 fixup_bug arch/x86/kernel/traps.c:177 [inline] fixup_bug arch/x86/kernel/traps.c:172 [inline] do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: sysfs_create_dir_ns+0x16f/0x1d0 fs/sysfs/dir.c:59 create_dir lib/kobject.c:71 [inline] kobject_add_internal+0x279/0x810 lib/kobject.c:229 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964 kobject_add_varg lib/kobject.c:364 [inline] kobject_init_and_add+0xde/0x120 lib/kobject.c:436 RIP: 0010:sysfs_warn_dup.cold+0x17/0x2d fs/sysfs/dir.c:30 RSP: 0018:ffff8880976df728 EFLAGS: 00010282 gfs2_sys_fs_add+0x184/0x3f0 fs/gfs2/sys.c:652 RAX: 000000000000003a RBX: ffff8880968d08d0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff86ac12c0 RDI: ffffed1012edbedb RBP: ffff888096e62a80 R08: 000000000000003a R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88821954f0e0 R13: ffff8880a517e7c0 R14: ffff8880968d08f0 R15: ffff888087f28898 fill_super+0x118b/0x2310 fs/gfs2/ops_fstype.c:1118 sysfs_create_dir_ns+0x16f/0x1d0 fs/sysfs/dir.c:59 create_dir lib/kobject.c:71 [inline] kobject_add_internal+0x279/0x810 lib/kobject.c:229 kobject_add_varg lib/kobject.c:364 [inline] kobject_init_and_add+0xde/0x120 lib/kobject.c:436 gfs2_sys_fs_add+0x184/0x3f0 fs/gfs2/sys.c:652 gfs2_mount+0x439/0x502 fs/gfs2/ops_fstype.c:1331 mount_fs+0x92/0x2a0 fs/super.c:1237 fill_super+0x118b/0x2310 fs/gfs2/ops_fstype.c:1118 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0xe53/0x2a00 fs/namespace.c:2879 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3072 gfs2_mount+0x439/0x502 fs/gfs2/ops_fstype.c:1331 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 mount_fs+0x92/0x2a0 fs/super.c:1237 entry_SYSCALL_64_after_hwframe+0x46/0xbb vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046 RIP: 0033:0x45c4fa vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0xe53/0x2a00 fs/namespace.c:2879 RSP: 002b:00007ffce0e92588 EFLAGS: 00000293 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffce0e925e0 RCX: 000000000045c4fa RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffce0e925a0 RBP: 00007ffce0e925a0 R08: 00007ffce0e925e0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000919 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3072 R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 Code: do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 56 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45c4fa RSP: 002b:00007ffce0e92588 EFLAGS: 00000293 61 ORIG_RAX: 00000000000000a5 8a RAX: ffffffffffffffda RBX: 00007ffce0e925e0 RCX: 000000000045c4fa e8 RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffce0e925a0 59 RBP: 00007ffce0e925a0 R08: 00007ffce0e925e0 R09: 0000000000000000 41 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000919 db R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 ff eb d8 e8 52 41 db ff e9 6d ff ff ff e8 08 6e b1 ff 4c 89 ea 48 89 ee 48 c7 c7 a0 9d b5 86 e8 57 0d a0 ff <0f> 0b 48 89 ef 5d 41 5c 41 5d e9 67 16 db ff 90 90 90 90 90 90 ---[ end trace a6519dccc2dd0630 ]--- Kernel Offset: disabled Rebooting in 86400 seconds..