Function verify_buffer_safe

refs/packed-backend.c:492–506

* We want to be able to compare mmapped reference records quickly, * without totally parsing them. We can do so because the records are * LF-terminated, and the refname should start exactly (GIT_SHA1_HEXSZ * + 1) bytes past the beginning of the record. * * But what if the `packed-refs` file contains garbage? We're willing * to tolerate not detecting the problem, as long as we don't produce

 * these checks fails.
 */
static void verify_buffer_safe(struct snapshot *snapshot)
{
	const char *start = snapshot->start;
	const char *eof = snapshot->eof;
	const char *last_line;

	if (start == eof)
		return;

	last_line = find_start_of_record(start, eof - 1);
	if (*(eof - 1) != '\n' ||
	    eof - last_line < snapshot_hexsz(snapshot) + 2)
		die_invalid_line(snapshot->refs->path,
				 last_line, eof - last_line);
}

/*
 * When parsing the "packed-refs" file, we will parse it line by line.