kill_block_super+0x95/0xe0 fs/super.c:1161
 deactivate_locked_super+0x6c/0xd0 fs/super.c:319
 deactivate_super+0x7f/0xa0 fs/super.c:350
------------[ cut here ]------------
 cleanup_mnt+0x186/0x2c0 fs/namespace.c:1183
WARNING: CPU: 0 PID: 18003 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x2d fs/sysfs/dir.c:30
 task_work_run+0x11f/0x190 kernel/task_work.c:113
Kernel panic - not syncing: panic_on_warn set ...

 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45de59
RSP: 002b:00007faf7eb29c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000038080 RCX: 000000000045de59
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000080
RBP: 00007faf7eb29ca0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fff80c5c2bf R14: 00007faf7eb2a9c0 R15: 000000000118bf2c
CPU: 0 PID: 18003 Comm: syz-executor.0 Not tainted 4.14.198-syzkaller #0
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+0x1b2/0x283 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
 __warn.cold+0x20/0x4b kernel/panic.c:547
 report_bug+0x208/0x249 lib/bug.c:186
 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
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964
RIP: 0010:sysfs_warn_dup.cold+0x17/0x2d fs/sysfs/dir.c:30
RSP: 0018:ffff888034c877a0 EFLAGS: 00010282
RAX: 000000000000004a RBX: ffff8880a601a090 RCX: 0000000000000000
RDX: 000000000001b7bf RSI: ffffffff814a4600 RDI: ffffed1006990eea
RBP: ffff888087f36340 R08: 000000000000004a R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a41389a0
R13: ffff88809415c6c0 R14: ffff8880a601a0b0 R15: ffff8880a13da658
 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_add+0x11f/0x180 lib/kobject.c:409
 device_add+0x32c/0x1510 drivers/base/core.c:1869
 device_create_groups_vargs+0x1dc/0x250 drivers/base/core.c:2513
 device_create_vargs+0x3a/0x50 drivers/base/core.c:2553
 bdi_register_va.part.0+0x35/0x650 mm/backing-dev.c:879
 bdi_register_va+0x63/0x80 mm/backing-dev.c:895
 super_setup_bdi_name+0x123/0x220 fs/super.c:1297
 fuse_bdi_init fs/fuse/inode.c:990 [inline]
 fuse_fill_super+0x937/0x15c0 fs/fuse/inode.c:1110
 mount_bdev+0x2b3/0x360 fs/super.c:1134
 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: 0033:0x45de59
RSP: 002b:00007f83d73a4c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00000000000219c0 RCX: 000000000045de59
RDX: 0000000020004300 RSI: 0000000020002040 RDI: 0000000020002000
RBP: 000000000118bf70 R08: 0000000020004440 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c
R13: 00007ffe5e353c9f R14: 00007f83d73a59c0 R15: 000000000118bf2c
Kernel Offset: disabled
Rebooting in 86400 seconds..