loop5: 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: 16454 Comm: syz-executor.5 Not tainted 5.15.140-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:hfs_find_init+0x6e/0x1e0 fs/hfs/bfind.c:21
Code: d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 48 d6 87 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 0c 01 00 00 41 8b 06 8d 7c 00 04 be c0
RSP: 0018:ffffc900106ff440 EFLAGS: 00010202
RAX: 1ffff920020dfea7 RBX: ffffc900106ff538 RCX: 0000000000040000
RDX: ffffc90002eb9000 RSI: 00000000000046da RDI: ffffc900106ff530
RBP: 0000000000000000 R08: ffffffff82433c6b R09: ffffc900106ff520
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc900106ff520
R13: dffffc0000000000 R14: 0000000000000040 R15: 0000000000000008
FS:  00007f757695e6c0(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff463573988 CR3: 00000000784bb000 CR4: 00000000003506e0
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+0x4f0/0xb60 fs/hfs/extent.c:366
 block_read_full_page+0x2f9/0xde0 fs/buffer.c:2290
 do_read_cache_page+0x752/0x1040
 read_mapping_page include/linux/pagemap.h:515 [inline]
 hfs_btree_open+0x509/0x1140 fs/hfs/btree.c:78
 hfs_mdb_get+0x1463/0x21d0 fs/hfs/mdb.c:199
 hfs_fill_super+0x100c/0x1730 fs/hfs/super.c:406
 mount_bdev+0x2c9/0x3f0 fs/super.c:1387
 legacy_get_tree+0xeb/0x180 fs/fs_context.c:611
 vfs_get_tree+0x88/0x270 fs/super.c:1517
 do_new_mount+0x28b/0xae0 fs/namespace.c:2994
 do_mount fs/namespace.c:3337 [inline]
 __do_sys_mount fs/namespace.c:3545 [inline]
 __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3522
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f75783de1ea
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:00007f757695dee8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f757695df80 RCX: 00007f75783de1ea
RDX: 0000000020000100 RSI: 00000000200000c0 RDI: 00007f757695df40
RBP: 0000000020000100 R08: 00007f757695df80 R09: 0000000000000410
R10: 0000000000000410 R11: 0000000000000202 R12: 00000000200000c0
R13: 00007f757695df40 R14: 00000000000002d0 R15: 0000000020000040
 </TASK>
Modules linked in:
---[ end trace 121872d8010d7c88 ]---
RIP: 0010:hfs_find_init+0x6e/0x1e0 fs/hfs/bfind.c:21
Code: d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 48 d6 87 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 0c 01 00 00 41 8b 06 8d 7c 00 04 be c0
RSP: 0018:ffffc900106ff440 EFLAGS: 00010202
RAX: 1ffff920020dfea7 RBX: ffffc900106ff538 RCX: 0000000000040000
RDX: ffffc90002eb9000 RSI: 00000000000046da RDI: ffffc900106ff530
RBP: 0000000000000000 R08: ffffffff82433c6b R09: ffffc900106ff520
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc900106ff520
R13: dffffc0000000000 R14: 0000000000000040 R15: 0000000000000008
FS:  00007f757695e6c0(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcc8a7eb000 CR3: 00000000784bb000 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 48 d6 87 ff       	call   0xff87d65c
  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 0c 01 00 00    	jne    0x143
  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