From 2c8c83b9731ff822fad6cc8c670ea5519c366a14 Mon Sep 17 00:00:00 2001
From: Joerg Sonnenberger <joerg@bec.de>
Date: Thu, 19 Jul 2018 21:14:53 +0200
Subject: [PATCH] Reject LHA archive entries with negative size.

---
 libarchive/archive_read_support_format_lha.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libarchive/archive_read_support_format_lha.c b/libarchive/archive_read_support_format_lha.c
index b8ef4ae10..95c99bb1f 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;