list_add corruption. prev->next should be next (ffff888145f20188), but was ffff88807c3000c8. (prev=ffff88807cf2d8c8). ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:30! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 18538 Comm: kworker/1:19 Not tainted 6.0.0-rc3-next-20220829-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Workqueue: events vhci_open_timeout RIP: 0010:__list_add_valid.cold+0x56/0x58 lib/list_debug.c:30 Code: 0b 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 00 31 49 8a e8 76 d5 f0 ff 0f 0b 48 89 f1 48 c7 c7 80 30 49 8a 4c 89 e6 e8 62 d5 f0 ff <0f> 0b 4c 89 e1 48 89 ee 48 c7 c7 e0 32 49 8a e8 4e d5 f0 ff 0f 0b RSP: 0018:ffffc90005ed7af0 EFLAGS: 00010282 RAX: 0000000000000075 RBX: ffff88806558fcc0 RCX: 0000000000000000 RDX: ffff88807e7a8000 RSI: ffffffff816204f8 RDI: fffff52000bdaf50 RBP: ffff88806558fcc8 R08: 0000000000000075 R09: 0000000000000000 R10: 0000000000000001 R11: 6464615f7473696c R12: ffff888145f20188 R13: ffff88807cf2d8c8 R14: ffff888145f20190 R15: ffff888145f20188 FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcdeb19cd0 CR3: 000000000bc8e000 CR4: 00000000003526e0 Call Trace: __list_add include/linux/list.h:69 [inline] list_add_tail include/linux/list.h:102 [inline] add_tail lib/klist.c:104 [inline] klist_add_tail+0x158/0x2a0 lib/klist.c:137 device_add+0xda7/0x1e90 drivers/base/core.c:3534 hci_register_dev+0x2f6/0xbb0 net/bluetooth/hci_core.c:2593 __vhci_create_device+0x393/0x7d0 drivers/bluetooth/hci_vhci.c:336 vhci_create_device drivers/bluetooth/hci_vhci.c:374 [inline] vhci_open_timeout+0x38/0x50 drivers/bluetooth/hci_vhci.c:531 process_one_work+0x991/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e4/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__list_add_valid.cold+0x56/0x58 lib/list_debug.c:30 Code: 0b 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 00 31 49 8a e8 76 d5 f0 ff 0f 0b 48 89 f1 48 c7 c7 80 30 49 8a 4c 89 e6 e8 62 d5 f0 ff <0f> 0b 4c 89 e1 48 89 ee 48 c7 c7 e0 32 49 8a e8 4e d5 f0 ff 0f 0b RSP: 0018:ffffc90005ed7af0 EFLAGS: 00010282 RAX: 0000000000000075 RBX: ffff88806558fcc0 RCX: 0000000000000000 RDX: ffff88807e7a8000 RSI: ffffffff816204f8 RDI: fffff52000bdaf50 RBP: ffff88806558fcc8 R08: 0000000000000075 R09: 0000000000000000 R10: 0000000000000001 R11: 6464615f7473696c R12: ffff888145f20188 R13: ffff88807cf2d8c8 R14: ffff888145f20190 R15: ffff888145f20188 FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcdeb19cd0 CR3: 000000000bc8e000 CR4: 00000000003526e0