__dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1b9/0x294 lib/dump_stack.c:113
kobject_add_internal failed for _dev_cuse with -EEXIST, don't try to register things with the same name in the same directory.
 sysfs_warn_dup.cold.3+0x1c/0x2b fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x184/0x1d0 fs/sysfs/dir.c:58
 create_dir lib/kobject.c:69 [inline]
 kobject_add_internal+0x353/0xba0 lib/kobject.c:228
WARNING: CPU: 0 PID: 4496 at lib/kobject.c:238 kobject_add_internal+0x8e0/0xba0 lib/kobject.c:236
Kernel panic - not syncing: panic_on_warn set ...

 kobject_add_varg lib/kobject.c:364 [inline]
 kobject_init_and_add+0xed/0x130 lib/kobject.c:435
 gfs2_sys_fs_add+0x1ff/0x500 fs/gfs2/sys.c:652
 fill_super+0x8c9/0x1a40 fs/gfs2/ops_fstype.c:1118
 gfs2_mount+0x5e6/0x712 fs/gfs2/ops_fstype.c:1321
 mount_fs+0xae/0x328 fs/super.c:1222
 vfs_kern_mount.part.34+0xd4/0x4d0 fs/namespace.c:1037
 vfs_kern_mount fs/namespace.c:1027 [inline]
 do_new_mount fs/namespace.c:2517 [inline]
 do_mount+0x564/0x3070 fs/namespace.c:2847
 ksys_mount+0x12d/0x140 fs/namespace.c:3063
 SYSC_mount fs/namespace.c:3077 [inline]
 SyS_mount+0x35/0x50 fs/namespace.c:3074
 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x44318a
RSP: 002b:00007ffdd2ebfa48 EFLAGS: 00000217 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000044318a
RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007ffdd2ebfa60
RBP: 00000000006cb018 R08: 0000000020001580 R09: 000000000000000a
R10: 0000000000200000 R11: 0000000000000217 R12: 6972773d61746164
R13: 63613d61746f7571 R14: 0030656c69662f2e R15: 0000000000000004
CPU: 0 PID: 4496 Comm: syzkaller551643 Not tainted 4.16.0+ #4
------------[ cut here ]------------
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1b9/0x294 lib/dump_stack.c:113
kobject_add_internal failed for _dev_cuse with -EEXIST, don't try to register things with the same name in the same directory.
 panic+0x22f/0x4de kernel/panic.c:183
WARNING: CPU: 1 PID: 4498 at lib/kobject.c:238 kobject_add_internal+0x8e0/0xba0 lib/kobject.c:236
Modules linked in:
CPU: 1 PID: 4498 Comm: syzkaller551643 Not tainted 4.16.0+ #4
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:kobject_add_internal+0x8e0/0xba0 lib/kobject.c:236
 __warn.cold.8+0x163/0x1a3 kernel/panic.c:547
RSP: 0018:ffff8801cb927480 EFLAGS: 00010286
 report_bug+0x252/0x2d0 lib/bug.c:186
RAX: 000000000000007e RBX: ffff8801ac569210 RCX: ffffffff815edf6d
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x1de/0x490 arch/x86/kernel/traps.c:296
RDX: 0000000000000000 RSI: ffffffff815f2c21 RDI: ffff8801cb926fe0
RBP: ffff8801cb927578 R08: ffff8801d9bc2000 R09: 0000000000000006
R10: ffff8801d9bc2000 R11: 0000000000000000 R12: 00000000ffffffef
R13: ffff8801d4131248 R14: 1ffff10039724e9a R15: ffff8801d4131200
FS:  00000000021d6880(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:991
CR2: 0000000000ef2530 CR3: 00000001ac9ab000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
RIP: 0010:kobject_add_internal+0x8e0/0xba0 lib/kobject.c:236
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
RSP: 0018:ffff8801acaa7480 EFLAGS: 00010286
RAX: 000000000000007e RBX: ffff8801ac54d1d0 RCX: ffffffff815edf6d
RDX: 0000000000000000 RSI: ffffffff815f2c21 RDI: ffff8801acaa6fe0
RBP: ffff8801acaa7578 R08: ffff8801d9bb2700 R09: 0000000000000006
R10: ffff8801d9bb2700 R11: 0000000000000000 R12: 00000000ffffffef
R13: ffff8801d4131248 R14: 1ffff10035954e9a R15: ffff8801d4131200
 kobject_add_varg lib/kobject.c:364 [inline]
 kobject_init_and_add+0xed/0x130 lib/kobject.c:435
 gfs2_sys_fs_add+0x1ff/0x500 fs/gfs2/sys.c:652
 kobject_add_varg lib/kobject.c:364 [inline]
 kobject_init_and_add+0xed/0x130 lib/kobject.c:435
 gfs2_sys_fs_add+0x1ff/0x500 fs/gfs2/sys.c:652
 fill_super+0x8c9/0x1a40 fs/gfs2/ops_fstype.c:1118
 fill_super+0x8c9/0x1a40 fs/gfs2/ops_fstype.c:1118
 gfs2_mount+0x5e6/0x712 fs/gfs2/ops_fstype.c:1321
 mount_fs+0xae/0x328 fs/super.c:1222
 vfs_kern_mount.part.34+0xd4/0x4d0 fs/namespace.c:1037
 gfs2_mount+0x5e6/0x712 fs/gfs2/ops_fstype.c:1321
 vfs_kern_mount fs/namespace.c:1027 [inline]
 do_new_mount fs/namespace.c:2517 [inline]
 do_mount+0x564/0x3070 fs/namespace.c:2847
 mount_fs+0xae/0x328 fs/super.c:1222
 vfs_kern_mount.part.34+0xd4/0x4d0 fs/namespace.c:1037
 vfs_kern_mount fs/namespace.c:1027 [inline]
 do_new_mount fs/namespace.c:2517 [inline]
 do_mount+0x564/0x3070 fs/namespace.c:2847
 ksys_mount+0x12d/0x140 fs/namespace.c:3063
 SYSC_mount fs/namespace.c:3077 [inline]
 SyS_mount+0x35/0x50 fs/namespace.c:3074
 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287
 ksys_mount+0x12d/0x140 fs/namespace.c:3063
 SYSC_mount fs/namespace.c:3077 [inline]
 SyS_mount+0x35/0x50 fs/namespace.c:3074
 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x44318a
RSP: 002b:00007ffdd2ebfa48 EFLAGS: 00000217
 ORIG_RAX: 00000000000000a5
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000044318a
RIP: 0033:0x44318a
RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007ffdd2ebfa60
RSP: 002b:00007ffdd2ebfa48 EFLAGS: 00000217 ORIG_RAX: 00000000000000a5
RBP: 00000000006cb018 R08: 0000000020001580 R09: 000000000000000a
R10: 0000000000200000 R11: 0000000000000217 R12: 6972773d61746164
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000044318a
RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007ffdd2ebfa60
R13: 63613d61746f7571 R14: 0030656c69662f2e R15: 0000000000000004
RBP: 00000000006cb018 R08: 0000000020001580 R09: 000000000000000a
Code: 
R10: 0000000000200000 R11: 0000000000000217 R12: 6972773d61746164
R13: 63613d61746f7571 R14: 0030656c69662f2e R15: 0000000000000004
00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 88 02 00 00 48 8b 13 48 c7 c6 60 b8 41 88 48 c7 c7 c0 b5 41 88 e8 b0 1e 01 fa <0f> 0b e9 47 fb ff ff 4c 89 e7 e8 f1 c4 6e fa e9 e2 f7 ff ff 4c 
---[ end trace 3c8c312bc258632e ]---
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..