sysfs_warn_dup+0x83/0xa0 fs/sysfs/dir.c:30 kobject_add_internal failed for !-lo with -EEXIST, don't try to register things with the same name in the same directory. sysfs_create_dir_ns+0x178/0x1d0 fs/sysfs/dir.c:58 create_dir lib/kobject.c:69 [inline] kobject_add_internal+0x335/0xbc0 lib/kobject.c:227 WARNING: CPU: 1 PID: 4433 at lib/kobject.c:238 kobject_add_internal+0x8d4/0xbc0 lib/kobject.c:235 Kernel panic - not syncing: panic_on_warn set ... kobject_add_varg lib/kobject.c:364 [inline] kobject_init_and_add+0xf9/0x150 lib/kobject.c:436 gfs2_sys_fs_add+0x1ff/0x580 fs/gfs2/sys.c:652 fill_super+0x86f/0x1d70 fs/gfs2/ops_fstype.c:1118 gfs2_mount+0x587/0x6e0 fs/gfs2/ops_fstype.c:1321 mount_fs+0x66/0x2d0 fs/super.c:1222 vfs_kern_mount.part.26+0xc6/0x4a0 fs/namespace.c:1037 vfs_kern_mount fs/namespace.c:2509 [inline] do_new_mount fs/namespace.c:2512 [inline] do_mount+0xea4/0x2bb0 fs/namespace.c:2842 SYSC_mount fs/namespace.c:3058 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3035 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x44311a RSP: 002b:00007ffd32d71548 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000044311a RDX: 00000000200001c0 RSI: 0000000020000000 RDI: 00007ffd32d71560 RBP: 00000000006cb018 R08: 0000000020000040 R09: 000000000000000a R10: 0000000000000000 R11: 0000000000000297 R12: 6e5f6b636f6c3d6f R13: 746f72706b636f6c R14: 0031656c69662f2e R15: 0000000000000004 CPU: 1 PID: 4433 Comm: syzkaller967728 Not tainted 4.16.0-rc7+ #8 ------------[ cut here ]------------ Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x24d lib/dump_stack.c:53 kobject_add_internal failed for !-lo with -EEXIST, don't try to register things with the same name in the same directory. panic+0x1e4/0x41c kernel/panic.c:183 WARNING: CPU: 0 PID: 4434 at lib/kobject.c:238 kobject_add_internal+0x8d4/0xbc0 lib/kobject.c:235 Modules linked in: CPU: 0 PID: 4434 Comm: syzkaller967728 Not tainted 4.16.0-rc7+ #8 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 __warn+0x1dc/0x200 kernel/panic.c:547 RIP: 0010:kobject_add_internal+0x8d4/0xbc0 lib/kobject.c:235 RSP: 0018:ffff8801afb6f4a0 EFLAGS: 00010282 report_bug+0x1f4/0x2b0 lib/bug.c:186 RAX: dffffc0000000008 RBX: ffff8801ac9cd190 RCX: ffffffff815b193e fixup_bug.part.10+0x37/0x80 arch/x86/kernel/traps.c:178 RDX: 0000000000000000 RSI: 1ffff10035f6de44 RDI: 1ffff10035f6de19 RBP: ffff8801afb6f598 R08: 1ffff10035f6dddb R09: 0000000000000001 fixup_bug arch/x86/kernel/traps.c:247 [inline] do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296 R10: ffff8801afb6f260 R11: 0000000000000000 R12: 1ffff10035f6de9a R13: 00000000ffffffef R14: ffff8801d399bc48 R15: 1ffff10035f6de9e FS: 00000000023a4880(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004b57b8 CR3: 00000001d092d006 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:986 RIP: 0010:kobject_add_internal+0x8d4/0xbc0 lib/kobject.c:235 RSP: 0018:ffff8801b07d74a0 EFLAGS: 00010282 RAX: dffffc0000000008 RBX: ffff8801d9549150 RCX: ffffffff815b193e RDX: 0000000000000000 RSI: 1ffff100360fae44 RDI: 1ffff100360fae19 kobject_add_varg lib/kobject.c:364 [inline] kobject_init_and_add+0xf9/0x150 lib/kobject.c:436 RBP: ffff8801b07d7598 R08: 1ffff100360faddb R09: 0000000000000000 R10: ffff8801b07d7260 R11: 0000000000000000 R12: 1ffff100360fae9a R13: 00000000ffffffef R14: ffff8801d399bc48 R15: 1ffff100360fae9e gfs2_sys_fs_add+0x1ff/0x580 fs/gfs2/sys.c:652 kobject_add_varg lib/kobject.c:364 [inline] kobject_init_and_add+0xf9/0x150 lib/kobject.c:436 fill_super+0x86f/0x1d70 fs/gfs2/ops_fstype.c:1118 gfs2_sys_fs_add+0x1ff/0x580 fs/gfs2/sys.c:652 fill_super+0x86f/0x1d70 fs/gfs2/ops_fstype.c:1118 gfs2_mount+0x587/0x6e0 fs/gfs2/ops_fstype.c:1321 mount_fs+0x66/0x2d0 fs/super.c:1222 vfs_kern_mount.part.26+0xc6/0x4a0 fs/namespace.c:1037 gfs2_mount+0x587/0x6e0 fs/gfs2/ops_fstype.c:1321 vfs_kern_mount fs/namespace.c:2509 [inline] do_new_mount fs/namespace.c:2512 [inline] do_mount+0xea4/0x2bb0 fs/namespace.c:2842 mount_fs+0x66/0x2d0 fs/super.c:1222 vfs_kern_mount.part.26+0xc6/0x4a0 fs/namespace.c:1037 vfs_kern_mount fs/namespace.c:2509 [inline] do_new_mount fs/namespace.c:2512 [inline] do_mount+0xea4/0x2bb0 fs/namespace.c:2842 SYSC_mount fs/namespace.c:3058 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3035 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 SYSC_mount fs/namespace.c:3058 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3035 entry_SYSCALL_64_after_hwframe+0x42/0xb7 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 RIP: 0033:0x44311a RSP: 002b:00007ffd32d71548 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000044311a RDX: 00000000200001c0 RSI: 0000000020000000 RDI: 00007ffd32d71560 RBP: 00000000006cb018 R08: 0000000020000040 R09: 000000000000000a R10: 0000000000000000 R11: 0000000000000297 R12: 6e5f6b636f6c3d6f R13: 746f72706b636f6c R14: 0031656c69662f2e R15: 0000000000000004 Code: 00 00 00 00 fc entry_SYSCALL_64_after_hwframe+0x42/0xb7 ff df RIP: 0033:0x44311a RSP: 002b:00007ffd32d71548 EFLAGS: 00000297 48 ORIG_RAX: 00000000000000a5 c1 ea RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000044311a RDX: 00000000200001c0 RSI: 0000000020000000 RDI: 00007ffd32d71560 03 80 RBP: 00000000006cb018 R08: 0000000020000040 R09: 000000000000000a R10: 0000000000000000 R11: 0000000000000297 R12: 6e5f6b636f6c3d6f 3c 02 R13: 746f72706b636f6c R14: 0031656c69662f2e R15: 0000000000000004 00 0f 85 aa 00 00 00 48 8b 13 48 c7 c6 00 24 d6 87 48 c7 c7 60 21 d6 87 e8 4c b3 62 fa <0f> 0b e9 1d fb ff ff e8 30 9e 92 fa 0f 0b e9 29 fe ff ff e8 24 ---[ end trace 2ba9b53d5b111ede ]--- Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..