Re: [PATCH v10 0/8] MR1628: ntdll: Implement Low Fragmentation Heap.

[Jinoh Kang (＠iamahuman)]

Jinoh Kang (@iamahuman) commented about dlls/ntdll/heap.c:
> err = "invalid block size";
>      else if (block->tail_size > block_get_size( block ) - sizeof(*block))
>          err = "invalid block unused size";
> -    else if ((next = next_block( subheap, block )) && (block_get_flags( next ) & BLOCK_FLAG_PREV_FREE))
> +    else if ((next = next_block( subheap, block )) && (block_get_flags( next ) & BLOCK_FLAG_PREV_FREE) &&
> +             /* LFH blocks do not use BLOCK_FLAG_PREV_FREE or back pointer */
> +             !(block_get_flags( block ) & BLOCK_FLAG_LFH))
>          err = "invalid next block flags";
>      else if (block_get_flags( block ) & BLOCK_FLAG_PREV_FREE)

```suggestion:-4+0
    else
    {
        /* LFH blocks do not use BLOCK_FLAG_PREV_FREE or back pointer */
        next = (block_get_flags( block ) & BLOCK_FLAG_LFH) ? NULL : next_block( subheap, block );
    }

    if (!err && next && (block_get_flags( next ) & BLOCK_FLAG_PREV_FREE))
        err = "invalid next block flags";

    if (!err && (block_get_flags( block ) & BLOCK_FLAG_PREV_FREE))
```

-- 
https://gitlab.winehq.org/wine/wine/-/merge_requests/1628#note_23838