libarchive: Cherry-pick upstream 2c8c83b9

Relevant vendor changes:
  Fix issue #948: out-of-bounds read in lha_read_data_none()

admbugs:	877
Security:	CVE-2017-14503

1 files changed, 6 insertions, 0 deletions

diff --git a/libarchive/archive_read_support_format_lha.c b/libarchive/archive_read_support_format_lha.c
index b8ef4ae10ece..95c99bb1f31e 100644
--- a/libarchive/archive_read_support_format_lha.c
+++ b/libarchive/archive_read_support_format_lha.c
@@ -701,6 +701,12 @@ archive_read_format_lha_read_header(struct archive_read *a,
 	 * Prepare variables used to read a file content.
 	 */
 	lha->entry_bytes_remaining = lha->compsize;
+	if (lha->entry_bytes_remaining < 0) {
+		archive_set_error(&a->archive,
+		    ARCHIVE_ERRNO_FILE_FORMAT,
+		    "Invalid LHa entry size");
+		return (ARCHIVE_FATAL);
+	}
 	lha->entry_offset = 0;
 	lha->entry_crc_calculated = 0;