__do_sys_renameat2 fs/namei.c:4963 [inline]
 __se_sys_renameat2 fs/namei.c:4960 [inline]
 __arm64_sys_renameat2+0x6c/0x88 fs/namei.c:4960
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall arch/arm64/kernel/syscall.c:52 [inline]
 el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x48/0x104 arch/arm64/kernel/syscall.c:193
 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000020
Mem abort info:
  ESR = 0x0000000096000046
  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 = 0x00000046
  CM = 0, WnR = 1
user pgtable: 4k pages, 48-bit VAs, pgdp=000000015a3b6000
[0000000000000020] pgd=080000016048e003, p4d=080000016048e003, pud=080000015f90c003, pmd=0000000000000000
Internal error: Oops: 0000000096000046 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 7657 Comm: syz-executor.1 Not tainted 6.2.0-rc3-syzkaller-16387-g9598c377d828 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __memset+0x84/0x188 arch/arm64/lib/memset.S:100
lr : udf_write_fi+0x270/0x470
sp : ffff800018c6ba50
x29: ffff800018c6ba70 x28: 00000000fffffff0 x27: 00000000000000fe
x26: ffff0000c6fda4f8 x25: 0000000000000000 x24: 00000000fffffff0
x23: 00000000ffffffd4 x22: fffffffffffffff4 x21: ffff800018c6bb40
x20: ffff800018c6bb00 x19: 0000000000000003 x18: 00000000000000c0
x17: ffff80000df48158 x16: ffff80000dd86118 x15: ffff00011a099a00
x14: 0000000000000008 x13: 00000000ffffffff x12: 0000000000040000
x11: 000000000000c07f x10: ffff8000183c4000 x9 : 0000000000000006
x8 : 0000000000000020 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000010
x2 : ffffffffffffffd4 x1 : 0000000000000000 x0 : 0000000000000020
Call trace:
 __memset+0x84/0x188 arch/arm64/lib/memset.S:98
 udf_delete_entry fs/udf/namei.c:577 [inline]
 udf_rename+0x47c/0x6d0 fs/udf/namei.c:1173
 vfs_rename+0x59c/0x7f8 fs/namei.c:4779
 do_renameat2+0x48c/0x754 fs/namei.c:4930
 __do_sys_renameat2 fs/namei.c:4963 [inline]
 __se_sys_renameat2 fs/namei.c:4960 [inline]
 __arm64_sys_renameat2+0x6c/0x88 fs/namei.c:4960
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall arch/arm64/kernel/syscall.c:52 [inline]
 el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x48/0x104 arch/arm64/kernel/syscall.c:193
 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584
Code: 54000060 5400006b a8811d07 a8811d07 (a8811d07) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	54000060 	b.eq	0xc  // b.none
   4:	5400006b 	b.lt	0x10  // b.tstop
   8:	a8811d07 	stp	x7, x7, [x8], #16
   c:	a8811d07 	stp	x7, x7, [x8], #16
* 10:	a8811d07 	stp	x7, x7, [x8], #16 <-- trapping instruction