BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 0 P4D 0 
Oops: Oops: 0010 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5326 Comm: syz.0.0 Not tainted 6.14.0-syzkaller-13423-ga8662bcd2ff1 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc9000d347c38 EFLAGS: 00010297
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 000000000d347e00
RDX: ffff888000a72440 RSI: 00000000000000db RDI: ffff888011cc2c00
RBP: ffffc9000d347d60 R08: ffffffff88ed2d04 R09: 1ffff11002398583
R10: dffffc0000000000 R11: 0000000000000000 R12: ffffc9000d347e00
R13: ffff8880533f3b08 R14: dffffc0000000000 R15: 0000000000000001
FS:  00007fd64977c6c0(0000) GS:ffff88808c596000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000033f28000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 h5_recv+0x223/0x9b0 drivers/bluetooth/hci_h5.c:585
 hci_uart_tty_receive+0x197/0x220 drivers/bluetooth/hci_ldisc.c:627
 tiocsti+0x24f/0x310 drivers/tty/tty_io.c:2299
 tty_ioctl+0x516/0xdc0 drivers/tty/tty_io.c:2716
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd64898d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd64977c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd648ba6160 RCX: 00007fd64898d169
RDX: 0000200000000100 RSI: 0000000000005412 RDI: 0000000000000005
RBP: 00007fd648a0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fd648ba6160 R15: 00007ffdfbaeab28
 </TASK>
Modules linked in:
CR2: 0000000000000000
---[ end trace 0000000000000000 ]---
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc9000d347c38 EFLAGS: 00010297
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 000000000d347e00
RDX: ffff888000a72440 RSI: 00000000000000db RDI: ffff888011cc2c00
RBP: ffffc9000d347d60 R08: ffffffff88ed2d04 R09: 1ffff11002398583
R10: dffffc0000000000 R11: 0000000000000000 R12: ffffc9000d347e00
R13: ffff8880533f3b08 R14: dffffc0000000000 R15: 0000000000000001
FS:  00007fd64977c6c0(0000) GS:ffff88808c596000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000033f28000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400