ERROR: (device loop4): dbDiscardAG: -EIO
ERROR: (device loop4): dbAllocAG: allocation request is larger than the allocation group size
ERROR: (device loop4): dbDiscardAG: -EIO
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000018
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=0000000144b51000
[0000000000000018] pgd=08000001592ba003, p4d=08000001592ba003, pud=0800000159663003, pmd=0000000000000000
Internal error: Oops: 0000000096000046 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 29208 Comm: syz-executor.4 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 : dbDiscardAG+0x250/0x38c fs/jfs/jfs_dmap.c:1612
lr : dbDiscardAG+0x244/0x38c fs/jfs/jfs_dmap.c:1610
sp : ffff8000149f3c60
x29: ffff8000149f3ca0 x28: ffff00011bb4b000 x27: ffff000101a79258
x26: 000000000000003f x25: 0000000000000010 x24: ffff00011bb4b000
x23: 0000000000008000 x22: 0000000000000001 x21: 0000000000000000
x20: 0000000000000000 x19: ffff000101a7ca70 x18: 000000000000005c
x17: 0000000000000000 x16: ffff80000db49158 x15: ffff000119210000
x14: 0000000000000198 x13: 00000000ffffffff x12: 0000000000040000
x11: 0000000000021e0a x10: ffff80001f925000 x9 : 331f3f5eb5aec800
x8 : 0000000000000010 x7 : ffff800008d44884 x6 : 0000000000000000
x5 : ffff000119210000 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000001 x1 : ffff80000cb431b1 x0 : 0000000000000000
Call trace:
 dbDiscardAG+0x250/0x38c fs/jfs/jfs_dmap.c:1613
 jfs_ioc_trim+0x138/0x184 fs/jfs/jfs_discard.c:100
 jfs_ioctl+0x1c4/0x2ec fs/jfs/ioctl.c:131
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl fs/ioctl.c:856 [inline]
 __arm64_sys_ioctl+0xd0/0x140 fs/ioctl.c:856
 __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+0x48/0x164 arch/arm64/kernel/syscall.c:206
 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581
Code: 97d144d3 f94013e8 f94007f9 aa1f03e0 (f900051f) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	97d144d3 	bl	0xffffffffff45134c
   4:	f94013e8 	ldr	x8, [sp, #32]
   8:	f94007f9 	ldr	x25, [sp, #8]
   c:	aa1f03e0 	mov	x0, xzr
* 10:	f900051f 	str	xzr, [x8, #8] <-- trapping instruction