Kernel panic: "tinyubsan: use of NULL pointer"

[matteodev8]

Describe the bug After compiling the latest commit, I am getting this kernel panic in the serial monitor:

[10352] VFS: Mounted devtmpfs on '/dev'
[10896] Hello I am kernel_tasks running on CPU0
[11168] Ramdisk located at 0xffff8000069a9000
[74439] tinyubsan: use of NULL pointer at file ../../fs/vfs.c, line 434, column 2
[74582] AH! UNHANDLED EXCEPTION!
[74624] RIP: 0xffffffff800b7af6 RBP: 0xffff80000061cf38 RSP: 0xffff80000061cec0
[74677] RAX: (nil) RBX: 0xffff800000f9c6c8 RCX: 0x0000000000000008
[74738] RDX: 0x0000000000000008 RDI: (nil) RSI: 0xffff80000054c1d0
[74769] R8 : (nil) R9 : 0xffffffff80046504 R10: 0x000000000000000a
[74796] R11: 0x0000000000004000 R12: 0xffff800006830900 R13: 0x0000000000000008
[74860] R14: 0xffff80000054c1d0 R15: 0xffff80000067fd00 ERR: 0b10
[77180] CS : 0x0000000000000008 SS : 0x0000000000000010 RFLAGS: 0x0000000000000282
[77249] FS: (nil) UGS: 0xffff800000553200 KGS: 0xffff800000553200
*** PANIC:      Panic called on CPU0
*** PANIC:      Current thread id: 0
*** PANIC:      Process name corresponding to the current thread: kernel_tasks
*** PANIC:      Page fault at (nil) present: NP, read/write: R, user/supervisor: S, reserved: NR, execute: NX
*** PANIC:      Crashed at 0xffffffff800b7af6
*** PANIC:      Stack trace:
*** PANIC:      Kernel base: 0xffffffff80000000 Mem phys base: 0xffff800000000000
*** PANIC:      Loaded drivers

To Reproduce Steps to reproduce the behavior:

1. Use qemu-system-x86_64 -M q35 -m 512M -cdrom polaris.iso -serial stdio -boot d QEMU parameters
2. Either select KASLR on or off
3. See error

Expected behavior Successful boot

Screenshots

Environment (please complete the following information):

• Host OS: WSL Ubuntu
• Host OS Version: Windows 11 22631.3810 (Ubuntu 22.04.4 LTS)
• Emulator/Hypervisor: QEMU (No KVM)
• Emulator/Hypervisor Version: 6.2.0 (Debian 1:6.2+dfsg-2ubuntu6.21)

Additional context X