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-rw-r--r--lib/libarchive/archive_read.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/lib/libarchive/archive_read.c b/lib/libarchive/archive_read.c
index 9274d66..fd4f888 100644
--- a/lib/libarchive/archive_read.c
+++ b/lib/libarchive/archive_read.c
@@ -928,9 +928,12 @@ __archive_read_filter_ahead(struct archive_read_filter *filter,
for (;;) {
/*
- * If we can satisfy from the copy buffer, we're done.
+ * If we can satisfy from the copy buffer (and the
+ * copy buffer isn't empty), we're done. In particular,
+ * note that min == 0 is a perfectly well-defined
+ * request.
*/
- if (filter->avail >= min) {
+ if (filter->avail >= min && filter->avail > 0) {
if (avail != NULL)
*avail = filter->avail;
return (filter->next);
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