list_add double add: new=ffff88807e6ae420, prev=ffff88807e6ae420, next=ffff88823bc06000. ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:29! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 7523 Comm: kworker/u5:3 Not tainted 5.14.0-rc3-next-20210730-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: hci5 hci_rx_work RIP: 0010:__list_add_valid.cold+0x26/0x3c lib/list_debug.c:29 Code: 9f 8c de fa 4c 89 e1 48 c7 c7 a0 fa e3 89 e8 40 58 f2 ff 0f 0b 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 e0 fb e3 89 e8 29 58 f2 ff <0f> 0b 48 89 f1 48 c7 c7 60 fb e3 89 4c 89 e6 e8 15 58 f2 ff 0f 0b RSP: 0018:ffffc90002c3f828 EFLAGS: 00010282 RAX: 0000000000000058 RBX: ffff88823bc06000 RCX: 0000000000000000 RDX: ffff888084508000 RSI: ffffffff815d8978 RDI: fffff52000587ef7 RBP: ffff88807e6ae420 R08: 0000000000000058 R09: 0000000000000000 R10: ffffffff815d271e R11: 0000000000000000 R12: ffff88823bc06000 R13: ffff888083f55340 R14: ffff88807e6ae438 R15: ffff88807e6ae420 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000568000 CR3: 0000000077585000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __list_add include/linux/list.h:67 [inline] list_add_tail include/linux/list.h:100 [inline] kobj_kset_join lib/kobject.c:196 [inline] kobject_add_internal+0x18d/0xa60 lib/kobject.c:246 kobject_add_varg lib/kobject.c:390 [inline] kobject_add+0x150/0x1c0 lib/kobject.c:442 device_add+0x36a/0x21b0 drivers/base/core.c:3291 hci_conn_add_sysfs+0x97/0x190 net/bluetooth/hci_sysfs.c:53 hci_conn_complete_evt net/bluetooth/hci_event.c:2664 [inline] hci_event_packet+0x9e4/0x7c50 net/bluetooth/hci_event.c:6227 hci_rx_work+0x4f8/0xd30 net/bluetooth/hci_core.c:5121 process_one_work+0x98d/0x1630 kernel/workqueue.c:2276 worker_thread+0x658/0x11f0 kernel/workqueue.c:2422 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Modules linked in: ---[ end trace 893b7a9c988884df ]--- RIP: 0010:__list_add_valid.cold+0x26/0x3c lib/list_debug.c:29 Code: 9f 8c de fa 4c 89 e1 48 c7 c7 a0 fa e3 89 e8 40 58 f2 ff 0f 0b 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 e0 fb e3 89 e8 29 58 f2 ff <0f> 0b 48 89 f1 48 c7 c7 60 fb e3 89 4c 89 e6 e8 15 58 f2 ff 0f 0b RSP: 0018:ffffc90002c3f828 EFLAGS: 00010282 RAX: 0000000000000058 RBX: ffff88823bc06000 RCX: 0000000000000000 RDX: ffff888084508000 RSI: ffffffff815d8978 RDI: fffff52000587ef7 RBP: ffff88807e6ae420 R08: 0000000000000058 R09: 0000000000000000 R10: ffffffff815d271e R11: 0000000000000000 R12: ffff88823bc06000 R13: ffff888083f55340 R14: ffff88807e6ae438 R15: ffff88807e6ae420 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000568000 CR3: 000000000b68e000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400