loop2: detected capacity change from 0 to 2048
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000030
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
  CM = 0, WnR = 0
user pgtable: 4k pages, 48-bit VAs, pgdp=000000016113f000
[0000000000000030] pgd=080000016157d003, p4d=080000016157d003, pud=0800000161628003, pmd=0000000000000000
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 23537 Comm: syz-executor.2 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: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __nilfs_btree_get_block+0x54/0x33c fs/nilfs2/btree.c:475
lr : __nilfs_btree_get_block+0x44/0x33c fs/nilfs2/btree.c:473
sp : ffff8000136d3690
x29: ffff8000136d36b0 x28: 0000000000000000 x27: 0000000000000001
x26: ffff000114ef2a80 x25: 0000000000000000 x24: ffff00010ff8f6d8
x23: 0000000000000002 x22: 0000000000000000 x21: ffff00010ff8f6d8
x20: 000000000000003f x19: ffff000114ef2a80 x18: 00000000000000c0
x17: ffff80000dd0b198 x16: ffff80000db49158 x15: ffff00012d774f80
x14: ffff80000dd0b198 x13: ffff80000db49158 x12: 0000000000040000
x11: 0000000000034d84 x10: ffff80001b122000 x9 : ffff800008f5dc48
x8 : 0000000000000000 x7 : 0000000000000000 x6 : 000000000000003f
x5 : ffff8000136d3690 x4 : ffff8000136d36a0 x3 : 0000000000000000
x2 : ffff000114ef2a80 x1 : 000000000000003f x0 : ffff00010ff8f6d8
Call trace:
 __nilfs_btree_get_block+0x54/0x33c fs/nilfs2/btree.c:480
 nilfs_btree_do_lookup+0x268/0x55c fs/nilfs2/btree.c:569
 nilfs_btree_lookup+0x1a0/0x1d4 fs/nilfs2/btree.c:686
 nilfs_bmap_lookup_at_level+0x68/0x168 fs/nilfs2/bmap.c:69
 nilfs_bmap_lookup fs/nilfs2/bmap.h:170 [inline]
 nilfs_mdt_submit_block+0x164/0x4bc fs/nilfs2/mdt.c:142
 nilfs_mdt_read_block+0x58/0x22c fs/nilfs2/mdt.c:176
 nilfs_mdt_get_block+0x5c/0xcc fs/nilfs2/mdt.c:251
 nilfs_palloc_get_block+0xb4/0x18c fs/nilfs2/alloc.c:216
 nilfs_palloc_get_entry_block+0x90/0xa4 fs/nilfs2/alloc.c:318
 nilfs_ifile_get_inode_block+0x7c/0xf8 fs/nilfs2/ifile.c:143
 __nilfs_read_inode fs/nilfs2/inode.c:477 [inline]
 nilfs_iget+0xac/0x33c fs/nilfs2/inode.c:603
 nilfs_get_root_dentry+0x38/0x180 fs/nilfs2/super.c:904
 nilfs_fill_super+0x1e4/0x2f8 fs/nilfs2/super.c:1078
 nilfs_mount+0x370/0x52c fs/nilfs2/super.c:1317
 legacy_get_tree+0x30/0x74 fs/fs_context.c:610
 vfs_get_tree+0x40/0x140 fs/super.c:1530
 do_new_mount+0x1dc/0x4e4 fs/namespace.c:3040
 path_mount+0x358/0x914 fs/namespace.c:3370
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount fs/namespace.c:3568 [inline]
 __arm64_sys_mount+0x2c4/0x3c4 fs/namespace.c:3568
 __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: f9408ea8 910043e4 910003e5 aa1403e1 (f9401917) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	f9408ea8 	ldr	x8, [x21, #280]
   4:	910043e4 	add	x4, sp, #0x10
   8:	910003e5 	mov	x5, sp
   c:	aa1403e1 	mov	x1, x20
* 10:	f9401917 	ldr	x23, [x8, #48] <-- trapping instruction