From 9411bde3e4a70a81ff3ffd256b71927b2d90dcbb Mon Sep 17 00:00:00 2001
From: jmoellers <josef.moellers@suse.com>
Date: Fri, 7 Sep 2018 11:32:04 +0200
Subject: [PATCH] Avoid memory leak from __zzip_parse_root_directory().

---
 test/test.zip | Bin 1361 -> 1361 bytes
 zzip/zip.c    |  36 ++++++++++++++++++++++++++++++++++--
 2 files changed, 34 insertions(+), 2 deletions(-)

diff --git a/zzip/zip.c b/zzip/zip.c
index 88b833b..a685280 100644
--- a/zzip/zip.c
+++ b/zzip/zip.c
@@ -475,9 +475,15 @@ __zzip_parse_root_directory(int fd,
         else
         {
             if (io->fd.seeks(fd, zz_rootseek + zz_offset, SEEK_SET) < 0)
+	    {
+	    	free(hdr0);
                 return ZZIP_DIR_SEEK;
+	    }
             if (io->fd.read(fd, &dirent, sizeof(dirent)) < __sizeof(dirent))
+	    {
+	    	free(hdr0);
                 return ZZIP_DIR_READ;
+	    }
             d = &dirent;
         }
 
@@ -577,12 +583,38 @@ __zzip_parse_root_directory(int fd,
 
         if (hdr_return)
             *hdr_return = hdr0;
+	else
+	{
+	    /* If it is not assigned to *hdr_return, it will never be free()'d */
+	    free(hdr0);
+	    /* Make sure we don't free it again in case of error */
+	    hdr0 = NULL;
+	}
     }                           /* else zero (sane) entries */
 #  ifndef ZZIP_ALLOW_MODULO_ENTRIES
-    return (entries != zz_entries ? ZZIP_CORRUPTED : 0);
+    if (entries != zz_entries)
+    {
+	/* If it was assigned to *hdr_return, undo assignment */
+	if (p_reclen && hdr_return)
+	    *hdr_return = NULL;
+	/* Free it, if it was not already free()'d */
+	if (hdr0 != NULL)
+	    free(hdr0);
+	return ZZIP_CORRUPTED;
+    }
 #  else
-    return ((entries & (unsigned)0xFFFF) != zz_entries ? ZZIP_CORRUPTED : 0);
+    if (((entries & (unsigned)0xFFFF) != zz_entries)
+    {
+	/* If it was assigned to *hdr_return, undo assignment */
+	if (p_reclen && hdr_return)
+	    *hdr_return = NULL;
+	/* Free it, if it was not already free()'d */
+	if (hdr0 != NULL)
+	    free(hdr0);
+	return ZZIP_CORRUPTED;
+    }
 #  endif
+    return 0;
 }
 
 /* ------------------------- high-level interface ------------------------- */