loop1: detected capacity change from 0 to 64
general protection fault, probably for non-canonical address 0xdffffc0000000008: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047]
CPU: 0 PID: 4230 Comm: syz-executor.1 Not tainted 6.8.0-rc7-syzkaller-00238-g005f6f34bd47 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
RIP: 0010:hfs_find_init+0x72/0x1f0 fs/hfs/bfind.c:21
Code: d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 b4 d6 79 ff 48 c7 03 00 00 00 00 48 89 2c 24 4c 8d 75 40 4d 89 f7 49 c1 ef 03 <43> 0f b6 04 2f 84 c0 0f 85 10 01 00 00 41 8b 06 8d 7c 00 04 be c0
RSP: 0018:ffffc9000a07f2a0 EFLAGS: 00010202
RAX: 1ffff9200140fe73 RBX: ffffc9000a07f398 RCX: 0000000000040000
RDX: ffffc9000a6fc000 RSI: 000000000000815f RDI: ffffc9000a07f390
RBP: 0000000000000000 R08: ffffffff8279a26f R09: 0000000000000000
R10: ffffc9000a07f380 R11: fffff5200140fe77 R12: ffffc9000a07f380
R13: dffffc0000000000 R14: 0000000000000040 R15: 0000000000000008
FS:  00007f01d3fe46c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007feb9ee1f000 CR3: 000000003530a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hfs_ext_read_extent fs/hfs/extent.c:200 [inline]
 hfs_get_block+0x4f4/0xb60 fs/hfs/extent.c:366
 block_read_full_folio+0x426/0xe20 fs/buffer.c:2382
 filemap_read_folio+0x1a0/0x790 mm/filemap.c:2324
 do_read_cache_folio+0x134/0x820 mm/filemap.c:3703
 do_read_cache_page+0x30/0x200 mm/filemap.c:3769
 read_mapping_page include/linux/pagemap.h:888 [inline]
 hfs_btree_open+0x50b/0xf30 fs/hfs/btree.c:78
 hfs_mdb_get+0x1443/0x21b0 fs/hfs/mdb.c:199
 hfs_fill_super+0x107d/0x1790 fs/hfs/super.c:406
 mount_bdev+0x20a/0x2d0 fs/super.c:1658
 legacy_get_tree+0xee/0x190 fs/fs_context.c:662
 vfs_get_tree+0x90/0x2a0 fs/super.c:1779
 do_new_mount+0x2be/0xb40 fs/namespace.c:3352
 do_mount fs/namespace.c:3692 [inline]
 __do_sys_mount fs/namespace.c:3898 [inline]
 __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3875
 do_syscall_64+0xf9/0x240
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f01d327f4aa
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f01d3fe3ef8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f01d3fe3f80 RCX: 00007f01d327f4aa
RDX: 0000000020000240 RSI: 0000000020000140 RDI: 00007f01d3fe3f40
RBP: 0000000020000240 R08: 00007f01d3fe3f80 R09: 0000000000004000
R10: 0000000000004000 R11: 0000000000000202 R12: 0000000020000140
R13: 00007f01d3fe3f40 R14: 0000000000000280 R15: 0000000020000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:hfs_find_init+0x72/0x1f0 fs/hfs/bfind.c:21
Code: d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 b4 d6 79 ff 48 c7 03 00 00 00 00 48 89 2c 24 4c 8d 75 40 4d 89 f7 49 c1 ef 03 <43> 0f b6 04 2f 84 c0 0f 85 10 01 00 00 41 8b 06 8d 7c 00 04 be c0
RSP: 0018:ffffc9000a07f2a0 EFLAGS: 00010202
RAX: 1ffff9200140fe73 RBX: ffffc9000a07f398 RCX: 0000000000040000
RDX: ffffc9000a6fc000 RSI: 000000000000815f RDI: ffffc9000a07f390
RBP: 0000000000000000 R08: ffffffff8279a26f R09: 0000000000000000
R10: ffffc9000a07f380 R11: fffff5200140fe77 R12: ffffc9000a07f380
R13: dffffc0000000000 R14: 0000000000000040 R15: 0000000000000008
FS:  00007f01d3fe46c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005645a3959e60 CR3: 000000003530a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	d8 48 c1             	fmuls  -0x3f(%rax)
   3:	e8 03 42 80 3c       	call   0x3c80420b
   8:	28 00                	sub    %al,(%rax)
   a:	74 08                	je     0x14
   c:	48 89 df             	mov    %rbx,%rdi
   f:	e8 b4 d6 79 ff       	call   0xff79d6c8
  14:	48 c7 03 00 00 00 00 	movq   $0x0,(%rbx)
  1b:	48 89 2c 24          	mov    %rbp,(%rsp)
  1f:	4c 8d 75 40          	lea    0x40(%rbp),%r14
  23:	4d 89 f7             	mov    %r14,%r15
  26:	49 c1 ef 03          	shr    $0x3,%r15
* 2a:	43 0f b6 04 2f       	movzbl (%r15,%r13,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 10 01 00 00    	jne    0x147
  37:	41 8b 06             	mov    (%r14),%eax
  3a:	8d 7c 00 04          	lea    0x4(%rax,%rax,1),%edi
  3e:	be                   	.byte 0xbe
  3f:	c0                   	.byte 0xc0