ntfs: (device loop1): ntfs_lookup(): ntfs_lookup_ino_by_name() failed with error code -24.
==================================================================
BUG: KASAN: null-ptr-deref in traverse_mounts fs/namei.c:1378 [inline]
BUG: KASAN: null-ptr-deref in handle_mounts fs/namei.c:1498 [inline]
BUG: KASAN: null-ptr-deref in step_into+0x164/0xc20 fs/namei.c:1806
Read of size 4 at addr 0000000000000018 by task syz-executor/5176

CPU: 0 PID: 5176 Comm: syz-executor Not tainted 5.15.165-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call trace:
 dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 __kasan_report mm/kasan/report.c:438 [inline]
 kasan_report+0x168/0x1e4 mm/kasan/report.c:451
 kasan_check_range+0x274/0x2b4 mm/kasan/generic.c:189
 __kasan_check_read+0x44/0x54 mm/kasan/shadow.c:31
 traverse_mounts fs/namei.c:1378 [inline]
 handle_mounts fs/namei.c:1498 [inline]
 step_into+0x164/0xc20 fs/namei.c:1806
 walk_component+0x214/0x4cc fs/namei.c:1982
 lookup_last fs/namei.c:2431 [inline]
 path_lookupat+0x13c/0x3d0 fs/namei.c:2455
 filename_lookup+0x1c4/0x4c8 fs/namei.c:2484
 user_path_at_empty+0x5c/0x1a4 fs/namei.c:2883
 user_path_at include/linux/namei.h:57 [inline]
 ksys_umount fs/namespace.c:1779 [inline]
 __do_sys_umount fs/namespace.c:1787 [inline]
 __se_sys_umount fs/namespace.c:1785 [inline]
 __arm64_sys_umount+0xf8/0x17c fs/namespace.c:1785
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
==================================================================
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000018
Mem abort info:
  ESR = 0x0000000096000005
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x05: level 1 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000005
  CM = 0, WnR = 0
user pgtable: 4k pages, 48-bit VAs, pgdp=000000011d0cf000
[0000000000000018] pgd=080000010b096003, p4d=080000010b096003, pud=0000000000000000
Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 5176 Comm: syz-executor Tainted: G    B             5.15.165-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : traverse_mounts fs/namei.c:1378 [inline]
pc : handle_mounts fs/namei.c:1498 [inline]
pc : step_into+0x164/0xc20 fs/namei.c:1806
lr : traverse_mounts fs/namei.c:1378 [inline]
lr : handle_mounts fs/namei.c:1498 [inline]
lr : step_into+0x164/0xc20 fs/namei.c:1806
sp : ffff80001f8077a0
x29: ffff80001f8078c0 x28: 0000000000000018 x27: 0000000000000080
x26: ffff80001f807870 x25: 1ffff00003f00f0f x24: 0000000000000000
x23: dfff800000000000 x22: ffff80001f807878 x21: 1ffff00003f00f63
x20: ffff80001f807b18 x19: ffff80001f807ae0 x18: 1fffe000368f698e
x17: 1fffe000368f698e x16: ffff800011abb7f8 x15: ffff800014b5ef00
x14: ffff0001b47b4c80 x13: ffff0001b47b4c7c x12: ffff700002e22764
x11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000000
x8 : 0000000000000000 x7 : 0000000000000000 x6 : ffff80000826ac0c
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff80000819c844
x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 traverse_mounts fs/namei.c:1378 [inline]
 handle_mounts fs/namei.c:1498 [inline]
 step_into+0x164/0xc20 fs/namei.c:1806
 walk_component+0x214/0x4cc fs/namei.c:1982
 lookup_last fs/namei.c:2431 [inline]
 path_lookupat+0x13c/0x3d0 fs/namei.c:2455
 filename_lookup+0x1c4/0x4c8 fs/namei.c:2484
 user_path_at_empty+0x5c/0x1a4 fs/namei.c:2883
 user_path_at include/linux/namei.h:57 [inline]
 ksys_umount fs/namespace.c:1779 [inline]
 __do_sys_umount fs/namespace.c:1787 [inline]
 __se_sys_umount fs/namespace.c:1785 [inline]
 __arm64_sys_umount+0xf8/0x17c fs/namespace.c:1785
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Code: f9406ffc 52800081 aa1c03e0 97fc6856 (88dfff9c) 
---[ end trace d791f924238379ae ]---
----------------
Code disassembly (best guess):
   0:	f9406ffc 	ldr	x28, [sp, #216]
   4:	52800081 	mov	w1, #0x4                   	// #4
   8:	aa1c03e0 	mov	x0, x28
   c:	97fc6856 	bl	0xfffffffffff1a164
* 10:	88dfff9c 	ldar	w28, [x28] <-- trapping instruction