commit 22531545514043e04633e1c015c7540b9de9dbe4
Author: Tim Kientzle <kientzle@acm.org>
Date:   Fri Mar 22 23:48:41 2013 -0700

    Limit write requests to at most INT_MAX.
    This prevents a certain common programming error (passing -1 to write)
    from leading to other problems deeper in the library.

diff --git a/libarchive/archive_write.c b/libarchive/archive_write.c
index eede5e0..be85621 100644
--- libarchive/archive_write.c
+++ libarchive/archive_write.c
@@ -673,8 +673,13 @@ static ssize_t
 _archive_write_data(struct archive *_a, const void *buff, size_t s)
 {
 	struct archive_write *a = (struct archive_write *)_a;
+	const size_t max_write = INT_MAX;
+
 	archive_check_magic(&a->archive, ARCHIVE_WRITE_MAGIC,
 	    ARCHIVE_STATE_DATA, "archive_write_data");
+	/* In particular, this catches attempts to pass negative values. */
+	if (s > max_write)
+		s = max_write;
 	archive_clear_error(&a->archive);
 	return ((a->format_write_data)(a, buff, s));
 }
