general protection fault, probably for non-canonical address 0xdffffc000000000b: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000058-0x000000000000005f] CPU: 0 PID: 22322 Comm: syz-executor Not tainted 6.1.138-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 RIP: 0010:klist_put lib/klist.c:212 [inline] RIP: 0010:klist_del lib/klist.c:230 [inline] RIP: 0010:klist_remove+0x158/0x380 lib/klist.c:249 Code: 80 3c 04 00 74 08 4c 89 f7 e8 14 22 d7 f7 4d 8b 3e 49 83 e7 fe 49 8d 7f 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 ed 21 d7 f7 49 8b 47 58 48 89 44 24 10 4c 89 RSP: 0018:ffffc90003247580 EFLAGS: 00010202 RAX: 000000000000000b RBX: ffff888064a15940 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000058 RBP: ffffc90003247680 R08: dffffc0000000000 R09: fffffbfff1bce5a9 R10: fffffbfff1bce5a9 R11: 1ffffffff1bce5a8 R12: 1ffff1100fa61b0c R13: dffffc0000000000 R14: ffff88807d30d860 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c2f40b9 CR3: 000000004773e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000097 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: device_move+0x18f/0x6f0 drivers/base/core.c:4633 hci_conn_del_sysfs+0xab/0x160 net/bluetooth/hci_sysfs.c:73 hci_conn_cleanup+0x575/0x730 net/bluetooth/hci_conn.c:172 hci_conn_del+0x515/0x720 net/bluetooth/hci_conn.c:1151 hci_conn_hash_flush+0x203/0x290 net/bluetooth/hci_conn.c:2510 hci_dev_close_sync+0x930/0xf40 net/bluetooth/hci_sync.c:5178 hci_dev_do_close net/bluetooth/hci_core.c:510 [inline] hci_unregister_dev+0x202/0x4f0 net/bluetooth/hci_core.c:2707 vhci_release+0x7f/0xd0 drivers/bluetooth/hci_vhci.c:573 __fput+0x22c/0x920 fs/file_table.c:320 task_work_run+0x1ca/0x250 kernel/task_work.c:203 exit_task_work include/linux/task_work.h:39 [inline] do_exit+0x936/0x2400 kernel/exit.c:871 do_group_exit+0x217/0x2d0 kernel/exit.c:1021 get_signal+0x1272/0x1350 kernel/signal.c:2871 arch_do_signal_or_restart+0xb0/0x1230 arch/x86/kernel/signal.c:871 exit_to_user_mode_loop+0x70/0x110 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+0x16/0x40 kernel/entry/common.c:303 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f21c498d41f Code: Unable to access opcode bytes at 0x7f21c498d3f5. RSP: 002b:00007ffc5b2209d0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: 0000000000000004 RBX: 0000000000000676 RCX: 00007f21c498d41f RDX: 0000000000000004 RSI: 00007ffc5b220a90 RDI: 00000000000000f8 RBP: 00007ffc5b220a3c R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000257 R13: 00000000000927c0 R14: 00000000002a4600 R15: 00007ffc5b220a90 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+0x158/0x380 lib/klist.c:249 Code: 80 3c 04 00 74 08 4c 89 f7 e8 14 22 d7 f7 4d 8b 3e 49 83 e7 fe 49 8d 7f 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 ed 21 d7 f7 49 8b 47 58 48 89 44 24 10 4c 89 RSP: 0018:ffffc90003247580 EFLAGS: 00010202 RAX: 000000000000000b RBX: ffff888064a15940 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000058 RBP: ffffc90003247680 R08: dffffc0000000000 R09: fffffbfff1bce5a9 R10: fffffbfff1bce5a9 R11: 1ffffffff1bce5a8 R12: 1ffff1100fa61b0c R13: dffffc0000000000 R14: ffff88807d30d860 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c36f28a CR3: 000000001b6d6000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000097 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 f7 mov %r14,%rdi 9: e8 14 22 d7 f7 call 0xf7d72222 e: 4d 8b 3e mov (%r14),%r15 11: 49 83 e7 fe and $0xfffffffffffffffe,%r15 15: 49 8d 7f 58 lea 0x58(%r15),%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 ed 21 d7 f7 call 0xf7d72222 35: 49 8b 47 58 mov 0x58(%r15),%rax 39: 48 89 44 24 10 mov %rax,0x10(%rsp) 3e: 4c rex.WR 3f: 89 .byte 0x89