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Storing a buffer into a buffer replaced it, length included. As in ACPICA, the source is now copied into the buffer, which keeps its length: the rest is zeroed, or the source cut. An empty buffer takes the source's length. Found on a Dell XPS 13 7390, whose _BIF stores each text into a buffer one byte longer, then sets that last byte for its null: it failed with IndexOutOfBounds, and the battery read nothing.
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Storing a buffer into a buffer replaced it, length included. As in ACPICA, the source is now copied into the buffer, which keeps its length: the rest is zeroed, or the source cut. An empty buffer takes the source's length.
Found on a Dell XPS 13 7390, whose _BIF stores each text into a buffer one byte longer, then sets that last byte for its null: it failed with IndexOutOfBounds, and the battery read nothing.