erofs (device loop8): bogus dirent @ nid 46
erofs (device loop8): invalid de[0].nameoff 0 @ nid 89
Unable to handle kernel paging request at virtual address dfff80000000000d
KASAN: null-ptr-deref in range [0x0000000000000068-0x000000000000006f]
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, ISS2 = 0x00000000
  CM = 0, WnR = 0, TnD = 0, TagAccess = 0
  GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[dfff80000000000d] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 UID: 0 PID: 8600 Comm: syz-executor Not tainted 6.14.0-rc1-syzkaller-g2014c95afece #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __d_unalias+0x178/0x27c fs/dcache.c:2969
lr : __d_unalias+0x14c/0x27c fs/dcache.c:2958
sp : ffff80009d646f80
x29: ffff80009d646f80 x28: 0000000010000000 x27: 1ffff00013ac8e0c
x26: 1fffe0001bc60442 x25: dfff800000000000 x24: 0000000000000068
x23: ffff0000de302210 x22: 0000000000000000 x21: ffff0000f7a19780
x20: 0000000000000000 x19: ffff0000de302178 x18: ffff80009d646c80
x17: 0000000000047e96 x16: ffff8000803b9ea0 x15: 0000000000000001
x14: 1fffe0001bc3861c x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000000002 x10: 0000000000ff0100 x9 : 0000000000000000
x8 : 000000000000000d x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000020 x4 : 0000000000000000 x3 : ffff800080483764
x2 : 0000000000000001 x1 : ffff0000de302178 x0 : ffff0000f7a19780
Call trace:
 __d_unalias+0x178/0x27c fs/dcache.c:2969 (P)
 d_splice_alias+0x1d8/0x310 fs/dcache.c:3037
 erofs_lookup+0x230/0x4ec fs/erofs/namei.c:215
 __lookup_slow+0x258/0x37c fs/namei.c:1793
 lookup_slow fs/namei.c:1810 [inline]
 lookup_one_unlocked+0x144/0x280 fs/namei.c:2968
 ovl_lookup_positive_unlocked fs/overlayfs/namei.c:208 [inline]
 ovl_lookup_single+0x1bc/0x974 fs/overlayfs/namei.c:238
 ovl_lookup_layer+0x368/0x454 fs/overlayfs/namei.c:331
 ovl_lookup+0xa04/0x1fb8 fs/overlayfs/namei.c:1122
 __lookup_slow+0x258/0x37c fs/namei.c:1793
 lookup_slow+0x60/0x84 fs/namei.c:1810
 walk_component+0x280/0x36c fs/namei.c:2114
 lookup_last fs/namei.c:2612 [inline]
 path_lookupat+0x13c/0x3d0 fs/namei.c:2636
 filename_lookup+0x204/0x51c fs/namei.c:2665
 user_path_at+0x50/0x74 fs/namei.c:3072
 ksys_umount fs/namespace.c:2071 [inline]
 __do_sys_umount fs/namespace.c:2079 [inline]
 __se_sys_umount fs/namespace.c:2077 [inline]
 __arm64_sys_umount+0xf4/0x178 fs/namespace.c:2077
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
Code: 97fa61d0 f94002e8 9101a118 d343ff08 (38796908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	97fa61d0 	bl	0xffffffffffe98740
   4:	f94002e8 	ldr	x8, [x23]
   8:	9101a118 	add	x24, x8, #0x68
   c:	d343ff08 	lsr	x8, x24, #3
* 10:	38796908 	ldrb	w8, [x8, x25] <-- trapping instruction