non-paged memory list_del corruption, ffff888055d7e180->next is LIST_POISON1 (dead000000000100) ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:56! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 1 UID: 0 PID: 5979 Comm: kworker/u33:3 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Workqueue: hci1 hci_conn_timeout RIP: 0010:__list_del_entry_valid_or_report+0x121/0x200 lib/list_debug.c:56 Code: 48 c7 c7 c0 36 16 8c e8 cd 03 af fc 90 0f 0b 4c 89 e7 e8 72 42 13 fd 4c 89 e2 48 89 de 48 c7 c7 20 37 16 8c e8 b0 03 af fc 90 <0f> 0b 48 89 ef e8 55 42 13 fd 48 89 ea 48 89 de 48 c7 c7 80 37 16 RSP: 0018:ffffc90002937b78 EFLAGS: 00010282 RAX: 000000000000004e RBX: ffff888055d7e180 RCX: ffffffff819a5e09 RDX: 0000000000000000 RSI: ffffffff819adca6 RDI: 0000000000000005 RBP: dead000000000122 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000000 R11: 0000000000000000 R12: dead000000000100 R13: dffffc0000000000 R14: ffff8880365a4658 R15: ffff888055d7e180 FS: 0000000000000000(0000) GS:ffff8880d67b2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f67dbbccd58 CR3: 00000000548be000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 000000007ffffff6 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: __list_del_entry_valid include/linux/list.h:124 [inline] __list_del_entry include/linux/list.h:215 [inline] list_del include/linux/list.h:229 [inline] _hci_cmd_sync_cancel_entry.constprop.0+0x80/0x1d0 net/bluetooth/hci_sync.c:647 hci_cmd_sync_cancel_entry net/bluetooth/hci_sync.c:851 [inline] hci_cmd_sync_dequeue_once net/bluetooth/hci_sync.c:870 [inline] hci_cancel_connect_sync+0xfa/0x2b0 net/bluetooth/hci_sync.c:6951 hci_abort_conn+0x15a/0x340 net/bluetooth/hci_conn.c:2958 hci_conn_timeout+0x1a2/0x210 net/bluetooth/hci_conn.c:579 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400 kthread+0x3c2/0x780 kernel/kthread.c:463 ret_from_fork+0x56a/0x730 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__list_del_entry_valid_or_report+0x121/0x200 lib/list_debug.c:56 Code: 48 c7 c7 c0 36 16 8c e8 cd 03 af fc 90 0f 0b 4c 89 e7 e8 72 42 13 fd 4c 89 e2 48 89 de 48 c7 c7 20 37 16 8c e8 b0 03 af fc 90 <0f> 0b 48 89 ef e8 55 42 13 fd 48 89 ea 48 89 de 48 c7 c7 80 37 16 RSP: 0018:ffffc90002937b78 EFLAGS: 00010282 RAX: 000000000000004e RBX: ffff888055d7e180 RCX: ffffffff819a5e09 RDX: 0000000000000000 RSI: ffffffff819adca6 RDI: 0000000000000005 RBP: dead000000000122 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000000 R11: 0000000000000000 R12: dead000000000100 R13: dffffc0000000000 R14: ffff8880365a4658 R15: ffff888055d7e180 FS: 0000000000000000(0000) GS:ffff8880d67b2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f5016aeb00 CR3: 000000000e380000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 000000007ffffff6 DR6: 00000000ffff0ff0 DR7: 0000000000000400