general protection fault, probably for non-canonical address 0xdffffc000000000b: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000058-0x000000000000005f] CPU: 1 PID: 11104 Comm: syz-executor Not tainted 6.1.134-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:klist_put lib/klist.c:212 [inline] RIP: 0010:klist_del lib/klist.c:230 [inline] RIP: 0010:klist_remove+0x1e2/0x460 lib/klist.c:249 Code: 80 3c 04 00 74 08 4c 89 ff e8 9a 85 3b f7 4d 8b 2f 49 83 e5 fe 49 8d 7d 58 48 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 05 e8 73 85 3b f7 4d 8b 75 58 4c 89 ef e8 97 a5 15 RSP: 0018:ffffc90004f874a0 EFLAGS: 00010202 RAX: 000000000000000b RBX: ffffffff8e896988 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000058 RBP: ffffc90004f87598 R08: dffffc0000000000 R09: fffffbfff1d12d25 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1100a9d808c R13: 0000000000000000 R14: ffff88801c350000 R15: ffff888054ec0460 FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f96487d99d0 CR3: 0000000066788000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: device_move+0x1b0/0x700 drivers/base/core.c:4633 hci_conn_del_sysfs+0xa8/0x150 net/bluetooth/hci_sysfs.c:73 hci_conn_cleanup+0x5a0/0x740 net/bluetooth/hci_conn.c:172 hci_conn_del+0x417/0x6c0 net/bluetooth/hci_conn.c:1151 hci_conn_hash_flush+0x205/0x2a0 net/bluetooth/hci_conn.c:2510 hci_dev_close_sync+0x9a9/0xfc0 net/bluetooth/hci_sync.c:5178 hci_dev_do_close net/bluetooth/hci_core.c:510 [inline] hci_unregister_dev+0x207/0x500 net/bluetooth/hci_core.c:2707 vhci_release+0x7f/0xd0 drivers/bluetooth/hci_vhci.c:573 __fput+0x3f6/0x8d0 fs/file_table.c:320 task_work_run+0x246/0x300 kernel/task_work.c:203 exit_task_work include/linux/task_work.h:39 [inline] do_exit+0xa6e/0x26a0 kernel/exit.c:871 do_group_exit+0x202/0x2b0 kernel/exit.c:1021 get_signal+0x16cb/0x17a0 kernel/signal.c:2871 arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:871 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:174 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fc19a58fffc Code: Unable to access opcode bytes at 0x7fc19a58ffd2. RSP: 002b:00007ffdadd61390 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: 000000000000002c RBX: 00007fc19b2e4620 RCX: 00007fc19a58fffc RDX: 000000000000002c RSI: 00007fc19b2e4670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffdadd613e4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007fc19b2e4670 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:klist_put lib/klist.c:212 [inline] RIP: 0010:klist_del lib/klist.c:230 [inline] RIP: 0010:klist_remove+0x1e2/0x460 lib/klist.c:249 Code: 80 3c 04 00 74 08 4c 89 ff e8 9a 85 3b f7 4d 8b 2f 49 83 e5 fe 49 8d 7d 58 48 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 05 e8 73 85 3b f7 4d 8b 75 58 4c 89 ef e8 97 a5 15 RSP: 0018:ffffc90004f874a0 EFLAGS: 00010202 RAX: 000000000000000b RBX: ffffffff8e896988 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000058 RBP: ffffc90004f87598 R08: dffffc0000000000 R09: fffffbfff1d12d25 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1100a9d808c R13: 0000000000000000 R14: ffff88801c350000 R15: ffff888054ec0460 FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000001d000 CR3: 0000000062b67000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 80 3c 04 00 cmpb $0x0,(%rsp,%rax,1) 4: 74 08 je 0xe 6: 4c 89 ff mov %r15,%rdi 9: e8 9a 85 3b f7 call 0xf73b85a8 e: 4d 8b 2f mov (%r15),%r13 11: 49 83 e5 fe and $0xfffffffffffffffe,%r13 15: 49 8d 7d 58 lea 0x58(%r13),%rdi 19: 48 89 f8 mov %rdi,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 27: fc ff df * 2a: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction 2e: 74 05 je 0x35 30: e8 73 85 3b f7 call 0xf73b85a8 35: 4d 8b 75 58 mov 0x58(%r13),%r14 39: 4c 89 ef mov %r13,%rdi 3c: e8 .byte 0xe8 3d: 97 xchg %eax,%edi 3e: a5 movsl %ds:(%rsi),%es:(%rdi) 3f: 15 .byte 0x15