loop0: detected capacity change from 0 to 64
general protection fault, probably for non-canonical address 0xdffffc0000000008: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047]
CPU: 1 PID: 3628 Comm: syz-executor244 Not tainted 6.1.0-rc8-syzkaller-00164-g4cee37b3a4e6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:hfs_find_init+0x74/0x240 fs/hfs/bfind.c:21
Code: c1 ea 03 80 3c 02 00 0f 85 bc 01 00 00 4c 8d 6b 40 48 c7 45 18 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 6b 01 00 00 8b 43 40 be c0 0c
RSP: 0018:ffffc90003d0f528 EFLAGS: 00010212
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000008 RSI: ffffffff8245a0b5 RDI: ffffc90003d0f5a8
RBP: ffffc90003d0f590 R08: 0000000000000004 R09: 0000000000000004
R10: 0000000000000000 R11: 1ffffffff21154cb R12: 0000000000000004
R13: 0000000000000040 R14: ffff8880769c814a R15: ffffc90003d0f590
FS:  0000555556283300(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000005d84c8 CR3: 000000001d6df000 CR4: 0000000000350ee0
Call Trace:
 <TASK>
 hfs_ext_read_extent+0x18d/0xa20 fs/hfs/extent.c:200
 hfs_get_block+0x48d/0x820 fs/hfs/extent.c:366
 block_read_full_folio+0x35b/0x9d0 fs/buffer.c:2271
 filemap_read_folio+0xdb/0x2c0 mm/filemap.c:2407
 do_read_cache_folio+0x1df/0x510 mm/filemap.c:3534
 do_read_cache_page mm/filemap.c:3576 [inline]
 read_cache_page+0x5d/0x170 mm/filemap.c:3585
 read_mapping_page include/linux/pagemap.h:756 [inline]
 hfs_btree_open+0x78e/0xff0 fs/hfs/btree.c:78
 hfs_mdb_get+0x15b8/0x1f10 fs/hfs/mdb.c:199
 hfs_fill_super+0xa5f/0x1340 fs/hfs/super.c:406
 mount_bdev+0x351/0x410 fs/super.c:1401
 legacy_get_tree+0x109/0x220 fs/fs_context.c:610
 vfs_get_tree+0x8d/0x2f0 fs/super.c:1531
 do_new_mount fs/namespace.c:3040 [inline]
 path_mount+0x132a/0x1e20 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]
 __x64_sys_mount+0x283/0x300 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fd3fbca0b6a
Code: 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc837da638 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fd3fbca0b6a
RDX: 0000000020000240 RSI: 0000000020000280 RDI: 00007ffc837da640
RBP: 00007ffc837da640 R08: 00007ffc837da680 R09: 0000000000000258
R10: 0000000000000003 R11: 0000000000000286 R12: 0000000000000004
R13: 00005555562832c0 R14: 00007ffc837da680 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:hfs_find_init+0x74/0x240 fs/hfs/bfind.c:21
Code: c1 ea 03 80 3c 02 00 0f 85 bc 01 00 00 4c 8d 6b 40 48 c7 45 18 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 6b 01 00 00 8b 43 40 be c0 0c
RSP: 0018:ffffc90003d0f528 EFLAGS: 00010212
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000008 RSI: ffffffff8245a0b5 RDI: ffffc90003d0f5a8
RBP: ffffc90003d0f590 R08: 0000000000000004 R09: 0000000000000004
R10: 0000000000000000 R11: 1ffffffff21154cb R12: 0000000000000004
R13: 0000000000000040 R14: ffff8880769c814a R15: ffffc90003d0f590
FS:  0000555556283300(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd3fbc9f610 CR3: 000000001d6df000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
   0:	c1 ea 03             	shr    $0x3,%edx
   3:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   7:	0f 85 bc 01 00 00    	jne    0x1c9
   d:	4c 8d 6b 40          	lea    0x40(%rbx),%r13
  11:	48 c7 45 18 00 00 00 	movq   $0x0,0x18(%rbp)
  18:	00
  19:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  20:	fc ff df
  23:	4c 89 ea             	mov    %r13,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	0f b6 04 02          	movzbl (%rdx,%rax,1),%eax <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	74 08                	je     0x3a
  32:	3c 03                	cmp    $0x3,%al
  34:	0f 8e 6b 01 00 00    	jle    0x1a5
  3a:	8b 43 40             	mov    0x40(%rbx),%eax
  3d:	be                   	.byte 0xbe
  3e:	c0                   	.byte 0xc0
  3f:	0c                   	.byte 0xc