non-paged memory list_del corruption, ffff88807a21d400->next is LIST_POISON1 (dead000000000100) ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:58! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 5852 Comm: kworker/u9:8 Not tainted 6.15.0-rc3-syzkaller-00008-ga33b5a08cbbd #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Workqueue: hci4 hci_conn_timeout RIP: 0010:__list_del_entry_valid_or_report+0x10f/0x190 lib/list_debug.c:56 Code: 00 e6 a0 8c 4c 89 fe e8 6f ba 23 fc 90 0f 0b 48 89 df e8 e4 37 04 fd 48 c7 c7 60 e6 a0 8c 4c 89 fe 48 89 da e8 52 ba 23 fc 90 <0f> 0b 48 89 df e8 c7 37 04 fd 48 c7 c7 c0 e6 a0 8c 4c 89 fe 48 89 RSP: 0018:ffffc90004337a28 EFLAGS: 00010246 RAX: 000000000000004e RBX: dead000000000100 RCX: 43b4bd0f9337bf00 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffff88807a21d420 R08: ffffffff81a21cac R09: fffffbfff1d7a960 R10: dffffc0000000000 R11: fffffbfff1d7a960 R12: dead000000000122 R13: dffffc0000000000 R14: dead000000000100 R15: ffff88807a21d400 FS: 0000000000000000(0000) GS:ffff888124fcf000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000093030 CR3: 0000000061302000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 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 net/bluetooth/hci_sync.c:647 [inline] hci_cmd_sync_cancel_entry net/bluetooth/hci_sync.c:851 [inline] hci_cmd_sync_dequeue_once+0x262/0x360 net/bluetooth/hci_sync.c:870 hci_cancel_connect_sync+0xc3/0x120 net/bluetooth/hci_sync.c:-1 hci_abort_conn+0x194/0x330 net/bluetooth/hci_conn.c:3060 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xac3/0x18e0 kernel/workqueue.c:3319 worker_thread+0x870/0xd50 kernel/workqueue.c:3400 kthread+0x7b7/0x940 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 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+0x10f/0x190 lib/list_debug.c:56 Code: 00 e6 a0 8c 4c 89 fe e8 6f ba 23 fc 90 0f 0b 48 89 df e8 e4 37 04 fd 48 c7 c7 60 e6 a0 8c 4c 89 fe 48 89 da e8 52 ba 23 fc 90 <0f> 0b 48 89 df e8 c7 37 04 fd 48 c7 c7 c0 e6 a0 8c 4c 89 fe 48 89 RSP: 0018:ffffc90004337a28 EFLAGS: 00010246 RAX: 000000000000004e RBX: dead000000000100 RCX: 43b4bd0f9337bf00 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffff88807a21d420 R08: ffffffff81a21cac R09: fffffbfff1d7a960 R10: dffffc0000000000 R11: fffffbfff1d7a960 R12: dead000000000122 R13: dffffc0000000000 R14: dead000000000100 R15: ffff88807a21d400 FS: 0000000000000000(0000) GS:ffff888124fcf000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000093030 CR3: 000000003619a000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400