Bluetooth: hci0: Opcode 0x0c20 failed: -4 ------------[ cut here ]------------ ODEBUG: free active (active state 0) object: ffff88805f734978 object type: timer_list hint: hci_cmd_timeout+0x0/0x260 net/bluetooth/hci_core.c:408 WARNING: CPU: 3 PID: 7785 at lib/debugobjects.c:514 debug_print_object+0x1a3/0x2b0 lib/debugobjects.c:514 Modules linked in: CPU: 3 UID: 0 PID: 7785 Comm: syz.3.618 Not tainted 6.12.0-rc1-syzkaller-00381-g2a130b7e1fcd #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:debug_print_object+0x1a3/0x2b0 lib/debugobjects.c:514 Code: fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 54 48 8b 14 dd a0 35 b1 8b 41 56 4c 89 e6 48 c7 c7 00 29 b1 8b e8 4e 71 c0 fc 90 <0f> 0b 90 90 58 83 05 ad 3e 8f 0b 01 48 83 c4 18 5b 5d 41 5c 41 5d RSP: 0018:ffffc9000758f8d8 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffc90003a9b000 RDX: 0000000000040000 RSI: ffffffff814e38c6 RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8bb12fa0 R13: ffffffff8b4f6c60 R14: ffffffff8a05a170 R15: ffffc9000758f9e8 FS: 0000000000000000(0000) GS:ffff88802b700000(0063) knlGS:00000000f5726b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f73ede0c CR3: 0000000000e14000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __debug_check_no_obj_freed lib/debugobjects.c:989 [inline] debug_check_no_obj_freed+0x4b8/0x600 lib/debugobjects.c:1019 slab_free_hook mm/slub.c:2273 [inline] slab_free mm/slub.c:4579 [inline] kfree+0x2b3/0x4b0 mm/slub.c:4727 hci_release_dev+0x4d9/0x600 net/bluetooth/hci_core.c:2759 bt_host_release+0x6a/0xb0 net/bluetooth/hci_sysfs.c:94 device_release+0xa1/0x240 drivers/base/core.c:2575 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1e4/0x5a0 lib/kobject.c:737 put_device+0x1f/0x30 drivers/base/core.c:3783 hci_dev_put include/net/bluetooth/hci_core.h:1581 [inline] hci_dev_cmd+0x286/0x9c0 net/bluetooth/hci_core.c:763 hci_sock_ioctl+0x4f5/0x880 net/bluetooth/hci_sock.c:1150 hci_sock_compat_ioctl net/bluetooth/hci_sock.c:1177 [inline] hci_sock_compat_ioctl+0x68/0x80 net/bluetooth/hci_sock.c:1166 compat_sock_ioctl+0x17b/0x7e0 net/socket.c:3539 __do_compat_sys_ioctl+0x259/0x2b0 fs/ioctl.c:1007 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7fa7579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f572656c EFLAGS: 00000296 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00000000400448de RDX: 00000000200000c0 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi