Unable to handle kernel NULL pointer dereference at virtual address 0000000000000048
Mem abort info:
  ESR = 0x0000000096000006
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x06: level 2 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000006, ISS2 = 0x00000000
  CM = 0, WnR = 0, TnD = 0, TagAccess = 0
  GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
user pgtable: 4k pages, 52-bit VAs, pgdp=0000000043d6c200
[0000000000000048] pgd=080000006455b403, p4d=080000006edc1403, pud=080000006edb6403, pmd=0000000000000000
Internal error: Oops: 0000000096000006 [#1]  SMP
Modules linked in:
CPU: 0 UID: 0 PID: 5582 Comm: syz.0.635 Not tainted 6.15.0-rc7-syzkaller #0 PREEMPT 
Hardware name: linux,dummy-virt (DT)
pstate: 61402009 (nZCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)
pc : is_anon_ns fs/mount.h:165 [inline]
pc : do_move_mount+0x7c/0x558 fs/namespace.c:3648
lr : do_move_mount+0x34/0x558 fs/namespace.c:3626
sp : ffff800088883d10
x29: ffff800088883d10 x28: 0000000000000000 x27: fcf0000004819b20
x26: fcf0000004819b00 x25: f1f0000004957a80 x24: f7f0000004818c20
x23: 0000000004957a80 x22: fcf0000004819b00 x21: ffff800088883df8
x20: ffff800088883de8 x19: 0000000000000000 x18: 0000000000000001
x17: 00000000a109cf7d x16: 000000001ac6769b x15: ffff800081b610e0
x14: 0000000000000310 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000000001 x10: 4f044f9808e6f0a3 x9 : 0000000000000cc0
x8 : 0000000081b15788 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000002 x4 : 0000000000000fff x3 : fdf00000030d7cb8
x2 : 0000000000000000 x1 : fbf00000064c5d80 x0 : fbf00000064c5d80
Call trace:
 get_current arch/arm64/include/asm/current.h:21 [inline] (P)
 check_mnt fs/namespace.c:1003 [inline] (P)
 may_use_mount fs/namespace.c:3601 [inline] (P)
 do_move_mount+0x7c/0x558 fs/namespace.c:3640 (P)
 vfs_move_mount fs/namespace.c:4605 [inline]
 vfs_move_mount fs/namespace.c:4593 [inline]
 __do_sys_move_mount fs/namespace.c:4685 [inline]
 __se_sys_move_mount fs/namespace.c:4616 [inline]
 __arm64_sys_move_mount+0x15c/0x36c fs/namespace.c:4616
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x48/0x110 arch/arm64/kernel/syscall.c:49
 el0_svc_common.constprop.0+0x40/0xe0 arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x1c/0x28 arch/arm64/kernel/syscall.c:151
 el0_svc+0x30/0xe0 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x10c/0x138 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x1a4/0x1a8 arch/arm64/kernel/entry.S:600
Code: 32000261 f9400c00 1a931033 f9406b01 (f9402784) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	32000261 	orr	w1, w19, #0x1
   4:	f9400c00 	ldr	x0, [x0, #24]
   8:	1a931033 	csel	w19, w1, w19, ne	// ne = any
   c:	f9406b01 	ldr	x1, [x24, #208]
* 10:	f9402784 	ldr	x4, [x28, #72] <-- trapping instruction