loop4: detected capacity change from 0 to 64
Unable to handle kernel paging request at virtual address dfff800000000008
KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047]
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
[dfff800000000008] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 UID: 0 PID: 8393 Comm: syz.4.309 Not tainted 6.11.0-rc7-syzkaller-g5f5673607153 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : hfs_find_init+0x6c/0x1c8 fs/hfs/bfind.c:21
lr : hfs_find_init+0x30/0x1c8 fs/hfs/bfind.c:16
sp : ffff80009e816f50
x29: ffff80009e816f50 x28: ffff700013d02e00 x27: 0000000000000004
x26: ffff0000e78d0180 x25: 0000000000000008 x24: dfff800000000000
x23: ffff0000e78d014c x22: ffff80009e817038 x21: 0000000000000040
x20: ffff80009e817020 x19: 0000000000000000 x18: ffff80009e816aa0
x17: 0000000000046e9b x16: ffff80008b274880 x15: 0000000000000007
x14: 1ffff00013d02e04 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000040000 x10: 000000000001fded x9 : ffff8000a2bea000
x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff80009332f3c0 x4 : 0000000000000000 x3 : 0000000000000030
x2 : 0000000000000008 x1 : ffff80009e817020 x0 : ffff80009e817030
Call trace:
 hfs_find_init+0x6c/0x1c8 fs/hfs/bfind.c:21
 hfs_ext_read_extent fs/hfs/extent.c:200 [inline]
 hfs_get_block+0x29c/0x9e0 fs/hfs/extent.c:366
 block_read_full_folio+0x3c4/0xbe0 fs/buffer.c:2406
 hfs_read_folio+0x28/0x38 fs/hfs/inode.c:34
 filemap_read_folio+0x14c/0x39c mm/filemap.c:2355
 do_read_cache_folio+0x114/0x548 mm/filemap.c:3789
 do_read_cache_page mm/filemap.c:3855 [inline]
 read_cache_page+0x6c/0x15c mm/filemap.c:3864
 read_mapping_page include/linux/pagemap.h:907 [inline]
 hfs_btree_open+0x440/0x1014 fs/hfs/btree.c:78
 hfs_mdb_get+0x10cc/0x1c2c fs/hfs/mdb.c:199
 hfs_fill_super+0xd64/0x13b4 fs/hfs/super.c:407
 mount_bdev+0x1d4/0x2a0 fs/super.c:1679
 hfs_mount+0x44/0x58 fs/hfs/super.c:457
 legacy_get_tree+0xd4/0x16c fs/fs_context.c:662
 vfs_get_tree+0x90/0x28c fs/super.c:1800
 do_new_mount+0x278/0x900 fs/namespace.c:3472
 path_mount+0x590/0xe04 fs/namespace.c:3799
 do_mount fs/namespace.c:3812 [inline]
 __do_sys_mount fs/namespace.c:4020 [inline]
 __se_sys_mount fs/namespace.c:3997 [inline]
 __arm64_sys_mount+0x45c/0x5a8 fs/namespace.c:3997
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x1e0/0x23c 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:712
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598
Code: 97e25360 91010275 f90002df d343feb9 (38f86b28) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	97e25360 	bl	0xffffffffff894d80
   4:	91010275 	add	x21, x19, #0x40
   8:	f90002df 	str	xzr, [x22]
   c:	d343feb9 	lsr	x25, x21, #3
* 10:	38f86b28 	ldrsb	w8, [x25, x24] <-- trapping instruction