RBP: 0000000020000040 R08: 00007ffff14289c0 R09: 00524f5252450040 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ------------[ cut here ]------------ kobject_add_internal failed for 7:199-fuseblk with -EEXIST, don't try to register things with the same name in the same directory. WARNING: CPU: 0 PID: 4676 at lib/kobject.c:238 kobject_add_internal+0x8e0/0xba0 lib/kobject.c:236 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 4676 Comm: syz-executor0 Not tainted 4.17.0-rc1+ #11 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 panic+0x22f/0x4de kernel/panic.c:184 __warn.cold.8+0x163/0x1b3 kernel/panic.c:536 report_bug+0x252/0x2d0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x1de/0x490 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:992 RIP: 0010:kobject_add_internal+0x8e0/0xba0 lib/kobject.c:236 RSP: 0018:ffff8801d2c3f270 EFLAGS: 00010286 RAX: 0000000000000082 RBX: ffff8801d659e910 RCX: ffffffff8160a82d RDX: 0000000000000000 RSI: ffffffff8160f4e1 RDI: ffff8801d2c3edd0 RBP: ffff8801d2c3f368 R08: ffff8801d6498140 R09: 0000000000000006 R10: ffff8801d6498140 R11: 0000000000000000 R12: 00000000ffffffef R13: ffff8801d33da000 R14: 1ffff1003a587e58 R15: ffff8801d9bcaf00 kobject_add_varg lib/kobject.c:364 [inline] kobject_add+0x13a/0x190 lib/kobject.c:408 device_add+0x3a5/0x16d0 drivers/base/core.c:1796 device_create_groups_vargs+0x1ff/0x270 drivers/base/core.c:2439 device_create_vargs+0x46/0x60 drivers/base/core.c:2479 bdi_register_va.part.10+0xbb/0x970 mm/backing-dev.c:868 bdi_register_va+0x68/0x80 mm/backing-dev.c:884 super_setup_bdi_name+0x123/0x220 fs/super.c:1319 fuse_bdi_init fs/fuse/inode.c:987 [inline] fuse_fill_super+0xe6e/0x1e20 fs/fuse/inode.c:1110 mount_bdev+0x30c/0x3e0 fs/super.c:1164 fuse_mount_blk+0x34/0x40 fs/fuse/inode.c:1222 mount_fs+0xae/0x328 fs/super.c:1267 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:2518 [inline] do_mount+0x564/0x3070 fs/namespace.c:2848 ksys_mount+0x12d/0x140 fs/namespace.c:3064 __do_sys_mount fs/namespace.c:3078 [inline] __se_sys_mount fs/namespace.c:3075 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3075 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455389 RSP: 002b:00007ffff14289a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000455389 RDX: 00000000004b9d05 RSI: 0000000020000000 RDI: 0000000020000040 RBP: 0000000020000040 R08: 00007ffff14289c0 R09: 00524f5252450040 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..