Unable to handle kernel NULL pointer dereference at virtual address 0000000000000168
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=000000015376a000
[0000000000000168] pgd=0800000157d9d003, p4d=0800000157d9d003, pud=0000000000000000
Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 10052 Comm: segctord Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : _compound_head include/linux/page-flags.h:253 [inline]
pc : lock_page+0x28/0x1e0 include/linux/pagemap.h:958
lr : lock_page+0x28/0x1e0 include/linux/pagemap.h:956
sp : ffff800013c8bc00
x29: ffff800013c8bc00 x28: ffff800013c8bde0 x27: 000000000000001b
x26: fffffc0003db2200 x25: ffff000117576390 x24: ffff000117653098
x23: 0000000000000080 x22: ffff000117653008 x21: 0000000000000160
x20: ffff000117e46cb8 x19: 0000000000000160 x18: fffffffffffffff5
x17: ffff80000bffd6bc x16: ffff80000db49158 x15: ffff000117f69a80
x14: 0000000000000000 x13: 00000000ffffffff x12: ffff000117f69a80
x11: ff808000095d1a0c x10: 0000000000000000 x9 : 0000000000000000
x8 : 0000000000000000 x7 : ffff80000856806c x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000000 x3 : 0000000000000000
x2 : 0000000000000000 x1 : ffff80000cb431b1 x0 : 0000000000000000
Call trace:
 lock_page+0x28/0x1e0 include/linux/pagemap.h:956
 nilfs_segctor_prepare_write+0x6c/0x21c fs/nilfs2/segment.c:1658
 nilfs_segctor_do_construct+0x9f4/0xee8 fs/nilfs2/segment.c:2068
 nilfs_segctor_construct+0xa0/0x380 fs/nilfs2/segment.c:2375
 nilfs_segctor_thread_construct fs/nilfs2/segment.c:2483 [inline]
 nilfs_segctor_thread+0x180/0x660 fs/nilfs2/segment.c:2566
 kthread+0x12c/0x158 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860
Code: 9001df80 912a5000 52807781 97c7bd0e (f9400674) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	9001df80 	adrp	x0, 0x3bf0000
   4:	912a5000 	add	x0, x0, #0xa94
   8:	52807781 	mov	w1, #0x3bc                 	// #956
   c:	97c7bd0e 	bl	0xffffffffff1ef444
* 10:	f9400674 	ldr	x20, [x19, #8] <-- trapping instruction