RBP: 00007ffeca659d70 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fd7d4415fac R14: 00007fd7d4415fa0 R15: 00007fd7d4415fa0 Bluetooth: Can't register HCI device Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 UID: 0 PID: 5964 Comm: syz.0.18 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 RIP: 0010:h4_recv+0x52/0x1c0 drivers/bluetooth/hci_h4.c:112 Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 3c 01 00 00 4c 8b a3 b8 01 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 31 01 00 00 49 8b 34 24 48 89 ea 41 b9 04 00 00 RSP: 0018:ffffc900037afca8 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff888033b48400 RCX: ffffffff887767b0 RDX: 0000000000000000 RSI: ffffffff8877b6a8 RDI: ffff888033b485b8 RBP: ffffc900037afd68 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000001 R14: ffff888033b484c0 R15: ffffffff8cc1b1c0 FS: 000055556677d500(0000) GS:ffff888124339000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd7d4072140 CR3: 00000000747cb000 CR4: 00000000003526f0 Call Trace: hci_uart_tty_receive+0x259/0x7e0 drivers/bluetooth/hci_ldisc.c:627 tiocsti drivers/tty/tty_io.c:2290 [inline] tty_ioctl+0x909/0x1690 drivers/tty/tty_io.c:2706 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd7d419c819 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffeca659d08 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fd7d4415fa0 RCX: 00007fd7d419c819 RDX: 0000200000000100 RSI: 0000000000005412 RDI: 0000000000000003 RBP: 00007fd7d4232c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fd7d4415fac R14: 00007fd7d4415fa0 R15: 00007fd7d4415fa0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:h4_recv+0x52/0x1c0 drivers/bluetooth/hci_h4.c:112 Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 3c 01 00 00 4c 8b a3 b8 01 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 31 01 00 00 49 8b 34 24 48 89 ea 41 b9 04 00 00 RSP: 0018:ffffc900037afca8 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff888033b48400 RCX: ffffffff887767b0 RDX: 0000000000000000 RSI: ffffffff8877b6a8 RDI: ffff888033b485b8 RBP: ffffc900037afd68 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000001 R14: ffff888033b484c0 R15: ffffffff8cc1b1c0 FS: 000055556677d500(0000) GS:ffff888124339000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd7d4072140 CR3: 00000000747cb000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: df 48 89 fisttps -0x77(%rax) 3: fa cli 4: 48 c1 ea 03 shr $0x3,%rdx 8: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) c: 0f 85 3c 01 00 00 jne 0x14e 12: 4c 8b a3 b8 01 00 00 mov 0x1b8(%rbx),%r12 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 4c 89 e2 mov %r12,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 31 01 00 00 jne 0x165 34: 49 8b 34 24 mov (%r12),%rsi 38: 48 89 ea mov %rbp,%rdx 3b: 41 rex.B 3c: b9 .byte 0xb9 3d: 04 00 add $0x0,%al