Re: [PATCH v15 07/13] ref-filter: add support for %(contents:lines=X)

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Eric Sunshine <sunshine@xxxxxxxxxxxxxx> writes:

> Also, if 'buf' is indeed unconditionally NUL-terminated, then the (sp
> <= buf + size) check is wasted code since the result of strstr() will
> always be either NULL or pointing somewhere within the NUL-terminated
> string.

A caller can give a buf that is NUL terminated but specify that the
only early part of the buffer to be used by giving you a shorter
size, no?  In such a case, strstr() is safe in the sense that it is
guaranteed not to go on forever, but you need to verify the location
of the string it found is within the bounds.
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