gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' ------------[ cut here ]------------ WARNING: CPU: 0 PID: 8008 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 ... ------------[ cut here ]------------ CPU: 0 PID: 8008 Comm: syz-executor533 Not tainted 4.14.206-syzkaller #0 WARNING: CPU: 1 PID: 8007 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x2d fs/sysfs/dir.c:30 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: Modules linked in: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x283 lib/dump_stack.c:58 panic+0x1f9/0x42d kernel/panic.c:183 CPU: 1 PID: 8007 Comm: syz-executor533 Not tainted 4.14.206-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88809719a140 task.stack: ffff8880b31b8000 RIP: 0010:sysfs_warn_dup.cold+0x17/0x2d fs/sysfs/dir.c:30 RSP: 0018:ffff8880b31bf728 EFLAGS: 00010282 __warn.cold+0x20/0x4b kernel/panic.c:547 RAX: 000000000000003a RBX: ffff888095598950 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff878bb940 RDI: ffffed1016637edb RBP: ffff8880a965adc0 R08: 000000000000003a R09: 0000000000000000 report_bug+0x208/0x249 lib/bug.c:186 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b139a1c0 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 R13: ffff8880a1dc8bc0 R14: ffff888095598958 R15: ffff8880954808d8 FS: 0000000000b6b880(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000559533779ed8 CR3: 00000000abce8000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 RIP: 0010:sysfs_warn_dup.cold+0x17/0x2d fs/sysfs/dir.c:30 Call Trace: RSP: 0018:ffff8880b291f728 EFLAGS: 00010282 sysfs_create_dir_ns+0x16f/0x1d0 fs/sysfs/dir.c:59 RAX: 000000000000003a RBX: ffff8880954808d0 RCX: 0000000000000000 create_dir lib/kobject.c:71 [inline] kobject_add_internal+0x28b/0x930 lib/kobject.c:229 RDX: 0000000000000000 RSI: ffffffff878bb940 RDI: ffffed1016523edb kobject_add_varg lib/kobject.c:364 [inline] kobject_init_and_add+0xde/0x120 lib/kobject.c:436 RBP: ffff88809568ccc0 R08: 000000000000003a R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b139a1c0 R13: ffff8880b611ed00 R14: ffff8880954808d8 R15: ffff8880954dc918 gfs2_sys_fs_add+0x184/0x3f0 fs/gfs2/sys.c:652 sysfs_create_dir_ns+0x16f/0x1d0 fs/sysfs/dir.c:59 create_dir lib/kobject.c:71 [inline] kobject_add_internal+0x28b/0x930 lib/kobject.c:229 kobject_add_varg lib/kobject.c:364 [inline] kobject_init_and_add+0xde/0x120 lib/kobject.c:436 fill_super+0x118b/0x2310 fs/gfs2/ops_fstype.c:1122 gfs2_sys_fs_add+0x184/0x3f0 fs/gfs2/sys.c:652 fill_super+0x118b/0x2310 fs/gfs2/ops_fstype.c:1122 gfs2_mount+0x439/0x502 fs/gfs2/ops_fstype.c:1335 mount_fs+0x92/0x2a0 fs/super.c:1237 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046 gfs2_mount+0x439/0x502 fs/gfs2/ops_fstype.c:1335 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0xe53/0x2a00 fs/namespace.c:2879 mount_fs+0x92/0x2a0 fs/super.c:1237 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 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45c56a RSP: 002b:00007fff360837e8 EFLAGS: 00000293 ORIG_RAX: 00000000000000a5 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3072 RAX: ffffffffffffffda RBX: 00007fff36083840 RCX: 000000000045c56a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fff36083800 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 RBP: 00007fff36083800 R08: 00007fff36083840 R09: 0000000000000000 entry_SYSCALL_64_after_hwframe+0x46/0xbb R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000091c R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 RIP: 0033:0x45c56a Code: RSP: 002b:00007fff360837e8 EFLAGS: 00000293 ORIG_RAX: 00000000000000a5 f9 RAX: ffffffffffffffda RBX: 00007fff36083840 RCX: 000000000045c56a f1 RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fff36083800 8b RBP: 00007fff36083800 R08: 00007fff36083840 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000091c e8 R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 a9 06 db ff eb d8 e8 a2 06 db ff e9 6d ff ff ff e8 48 36 b1 ff 4c 89 ea 48 89 ee 48 c7 c7 20 a0 95 87 e8 47 c2 9f ff <0f> 0b 48 89 ef 5d 41 5c 41 5d e9 b7 db da ff 90 90 90 90 90 90 ---[ end trace 94a9d7d21dd7af32 ]--- Kernel Offset: disabled Rebooting in 86400 seconds..