From: sms
Subject: Fix CVE-2014-8140: out-of-bounds write issue in test_compr_eb()
Bug-Debian: http://bugs.debian.org/773722

--- a/extract.c
+++ b/extract.c
@@ -2234,10 +2234,17 @@
     if (compr_offset < 4)                /* field is not compressed: */
         return PK_OK;                    /* do nothing and signal OK */
 
+    /* Return no/bad-data error status if any problem is found:
+     *    1. eb_size is too small to hold the uncompressed size
+     *       (eb_ucsize).  (Else extract eb_ucsize.)
+     *    2. eb_ucsize is zero (invalid).  2014-12-04 SMS.
+     *    3. eb_ucsize is positive, but eb_size is too small to hold
+     *       the compressed data header.
+     */
     if ((eb_size < (EB_UCSIZE_P + 4)) ||
-        ((eb_ucsize = makelong(eb+(EB_HEADSIZE+EB_UCSIZE_P))) > 0L &&
-         eb_size <= (compr_offset + EB_CMPRHEADLEN)))
-        return IZ_EF_TRUNC;               /* no compressed data! */
+     ((eb_ucsize = makelong( eb+ (EB_HEADSIZE+ EB_UCSIZE_P))) == 0L) ||
+     ((eb_ucsize > 0L) && (eb_size <= (compr_offset + EB_CMPRHEADLEN))))
+        return IZ_EF_TRUNC;             /* no/bad compressed data! */
 
     if (
 #ifdef INT_16BIT
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<div class='path'>path: <a href='/guix/log/?id=22a788d085ada0dcf8e5d701ce192c87d08e3734'>root</a>/<a href='/guix/log/tests?id=22a788d085ada0dcf8e5d701ce192c87d08e3734'>tests</a>/<a href='/guix/log/tests/import-git.scm?id=22a788d085ada0dcf8e5d701ce192c87d08e3734'>import-git.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/tests/import-git.scm?id=22a788d085ada0dcf8e5d701ce192c87d08e3734&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-09-18 19:37:45 +0200'>2021-09-18</span></td><td><a href='/guix/commit/tests/import-git.scm?id=59ee10754eddddb99e4a80b9e18aa12ed1b3d77a'>import: Add 'generic-git' updater.</a><span class='msg-avail'>...</span></td><td>Xinglu Chen</td></tr>