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BUG: KASAN: wild-memory-access in memcpy_from_page include/linux/highmem.h:423 [inline]
BUG: KASAN: wild-memory-access in hfsplus_bnode_read+0x100/0x240 fs/hfsplus/bnode.c:32
Read of size 1 at addr 0005088000000fff by task syz-executor.0/5521

CPU: 2 UID: 0 PID: 5521 Comm: syz-executor.0 Not tainted 6.11.0-syzkaller-g1868f9d0260e-dirty #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119
 kasan_report+0xd9/0x110 mm/kasan/report.c:601
 check_region_inline mm/kasan/generic.c:183 [inline]
 kasan_check_range+0xef/0x1a0 mm/kasan/generic.c:189
 __asan_memcpy+0x23/0x60 mm/kasan/shadow.c:105
 memcpy_from_page include/linux/highmem.h:423 [inline]
 hfsplus_bnode_read+0x100/0x240 fs/hfsplus/bnode.c:32
 hfsplus_bnode_read_u16 fs/hfsplus/bnode.c:45 [inline]
 hfsplus_bnode_find+0x860/0xcb0 fs/hfsplus/bnode.c:522
 hfsplus_bmap_alloc+0x10e/0x830 fs/hfsplus/btree.c:390
 hfs_btree_inc_height.isra.0+0x100/0x8c0 fs/hfsplus/brec.c:475
 hfsplus_brec_insert+0xa02/0xc50 fs/hfsplus/brec.c:75
 __hfsplus_ext_write_extent+0x4a0/0x5e0 fs/hfsplus/extents.c:107
 __hfsplus_ext_cache_extent+0x98/0x9d0 fs/hfsplus/extents.c:186
 hfsplus_ext_read_extent+0x200/0x250 fs/hfsplus/extents.c:218
 hfsplus_file_extend+0x699/0x1090 fs/hfsplus/extents.c:462
 hfsplus_get_block+0x1ae/0x9e0 fs/hfsplus/extents.c:245
 __block_write_begin_int+0x4fb/0x16e0 fs/buffer.c:2121
 block_write_begin+0x9a/0x1d0 fs/buffer.c:2231
 cont_write_begin+0x61d/0x950 fs/buffer.c:2582
 hfsplus_write_begin+0x64/0x120 fs/hfsplus/inode.c:46
 cont_expand_zero fs/buffer.c:2509 [inline]
 cont_write_begin+0x34e/0x950 fs/buffer.c:2572
 hfsplus_write_begin+0x64/0x120 fs/hfsplus/inode.c:46
 generic_cont_expand_simple+0x121/0x210 fs/buffer.c:2473
 hfsplus_setattr+0x250/0x320 fs/hfsplus/inode.c:258
 notify_change+0x6a6/0x1230 fs/attr.c:503
 do_truncate+0x15c/0x220 fs/open.c:65
 do_ftruncate+0x5d9/0x720 fs/open.c:181
 do_sys_ftruncate fs/open.c:199 [inline]
 __do_sys_ftruncate fs/open.c:207 [inline]
 __se_sys_ftruncate fs/open.c:205 [inline]
 __x64_sys_ftruncate+0xa9/0x110 fs/open.c:205
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f486f87dda9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f48705910c8 EFLAGS: 00000246 ORIG_RAX: 000000000000004d
RAX: ffffffffffffffda RBX: 00007f486f9abf80 RCX: 00007f486f87dda9
RDX: 0000000000000000 RSI: 0000000000048280 RDI: 0000000000000004
RBP: 00007f486f8ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f486f9abf80 R15: 00007fff0407f1d8
 </TASK>
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