sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' ------------[ cut here ]------------ WARNING: CPU: 1 PID: 7998 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x2d fs/sysfs/dir.c:30 ------------[ cut here ]------------ Kernel panic - not syncing: panic_on_warn set ... WARNING: CPU: 0 PID: 7996 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x2d fs/sysfs/dir.c:30 CPU: 1 PID: 7998 Comm: syz-executor563 Not tainted 4.14.206-syzkaller #0 Modules linked in: Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: CPU: 0 PID: 7996 Comm: syz-executor563 Not tainted 4.14.206-syzkaller #0 __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x283 lib/dump_stack.c:58 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 panic+0x1f9/0x42d kernel/panic.c:183 task: ffff888095b16280 task.stack: ffff888095a08000 RIP: 0010:sysfs_warn_dup.cold+0x17/0x2d fs/sysfs/dir.c:30 RSP: 0018:ffff888095a0f728 EFLAGS: 00010282 RAX: 000000000000003a RBX: ffff888096524c90 RCX: 0000000000000000 __warn.cold+0x20/0x4b kernel/panic.c:547 RDX: 0000000000000000 RSI: ffffffff878bb940 RDI: ffffed1012b41edb RBP: ffff8880b47d8380 R08: 000000000000003a R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b0f1cd20 report_bug+0x208/0x249 lib/bug.c:186 R13: ffff8880b0b84f40 R14: ffff888096524c98 R15: ffff8880959f4c18 FS: 000000000159c880(0000) GS:ffff8880ba400000(0000) knlGS: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 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcdd155ba7 CR3: 0000000099069000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964 Call Trace: RIP: 0010:sysfs_warn_dup.cold+0x17/0x2d fs/sysfs/dir.c:30 sysfs_create_dir_ns+0x16f/0x1d0 fs/sysfs/dir.c:59 RSP: 0018:ffff8880b2c5f728 EFLAGS: 00010282 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 RAX: 000000000000003a RBX: ffff8880959f4c10 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff878bb940 RDI: ffffed101658bedb RBP: ffff8880b292a2c0 R08: 000000000000003a R09: 0000000000000000 gfs2_sys_fs_add+0x184/0x3f0 fs/gfs2/sys.c:652 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b0f1cd20 R13: ffff8880b0be33c0 R14: ffff8880959f4c18 R15: ffff888095570c58 sysfs_create_dir_ns+0x16f/0x1d0 fs/sysfs/dir.c:59 fill_super+0x118b/0x2310 fs/gfs2/ops_fstype.c:1122 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 gfs2_sys_fs_add+0x184/0x3f0 fs/gfs2/sys.c:652 gfs2_mount+0x439/0x502 fs/gfs2/ops_fstype.c:1335 fill_super+0x118b/0x2310 fs/gfs2/ops_fstype.c:1122 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 gfs2_mount+0x439/0x502 fs/gfs2/ops_fstype.c:1335 mount_fs+0x92/0x2a0 fs/super.c:1237 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3072 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 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45c57a RSP: 002b:00007ffc55f24a58 EFLAGS: 00000293 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffc55f24ab0 RCX: 000000000045c57a SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3072 RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffc55f24a70 RBP: 00007ffc55f24a70 R08: 00007ffc55f24ab0 R09: 0000000000000000 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000091c entry_SYSCALL_64_after_hwframe+0x46/0xbb R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 RIP: 0033:0x45c57a Code: RSP: 002b:00007ffc55f24a58 EFLAGS: 00000293 ORIG_RAX: 00000000000000a5 f9 RAX: ffffffffffffffda RBX: 00007ffc55f24ab0 RCX: 000000000045c57a f1 RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffc55f24a70 8b RBP: 00007ffc55f24a70 R08: 00007ffc55f24ab0 R09: 0000000000000000 e8 R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000091c 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 31b5b1dd47e6e6a8 ]--- Kernel Offset: disabled Rebooting in 86400 seconds..