syzbot

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BUG: KASAN: wild-memory-access in memcpy_from_page include/linux/highmem.h:417 [inline]
BUG: KASAN: wild-memory-access in hfsplus_bnode_read fs/hfsplus/bnode.c:32 [inline]
BUG: KASAN: wild-memory-access in hfsplus_bnode_read_u16+0x146/0x2c0 fs/hfsplus/bnode.c:45
Read of size 1 at addr 000508800000103f by task kworker/u8:4/61

CPU: 0 PID: 61 Comm: kworker/u8:4 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Workqueue: writeback wb_workfn (flush-7:0)
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
 print_report+0xe8/0x550 mm/kasan/report.c:491
 kasan_report+0x143/0x180 mm/kasan/report.c:601
 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189
 __asan_memcpy+0x29/0x70 mm/kasan/shadow.c:105
 memcpy_from_page include/linux/highmem.h:417 [inline]
 hfsplus_bnode_read fs/hfsplus/bnode.c:32 [inline]
 hfsplus_bnode_read_u16+0x146/0x2c0 fs/hfsplus/bnode.c:45
 hfsplus_bnode_find+0x76d/0x10c0 fs/hfsplus/bnode.c:522
 hfsplus_btree_write+0x24/0x4c0 fs/hfsplus/btree.c:289
 hfsplus_system_write_inode fs/hfsplus/super.c:136 [inline]
 hfsplus_write_inode+0x4c4/0x5e0 fs/hfsplus/super.c:162
 write_inode fs/fs-writeback.c:1498 [inline]
 __writeback_single_inode+0x6a1/0xfd0 fs/fs-writeback.c:1715
 writeback_sb_inodes+0x8e4/0x1220 fs/fs-writeback.c:1941
 wb_writeback+0x447/0xc70 fs/fs-writeback.c:2117
 wb_do_writeback fs/fs-writeback.c:2264 [inline]
 wb_workfn+0x400/0x1070 fs/fs-writeback.c:2304
 process_one_work kernel/workqueue.c:3254 [inline]
 process_scheduled_works+0xa02/0x1770 kernel/workqueue.c:3335
 worker_thread+0x86d/0xd70 kernel/workqueue.c:3416
 kthread+0x2f2/0x390 kernel/kthread.c:388
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
 </TASK>
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