libmicrohttpd

commit e724878002ace7dfbd53e4ecdc8093e16ef353fe
parent 6c2f3cf24f4a03b1eb3689d7913c11c7671c948f
Author: Evgeny Grin (Karlson2k) <k2k@narod.ru>
Date:   Sun, 12 Sep 2021 18:11:28 +0300

postprocessor: do not call memcpy() / memmove() with zero size

Diffstat:
M
src/microhttpd/postprocessor.c
 | 
18
+++++++++++-------

1 file changed, 11 insertions(+), 7 deletions(-)
diff --git a/src/microhttpd/postprocessor.c b/src/microhttpd/postprocessor.c
@@ -360,9 +360,10 @@ process_value (struct MHD_PostProcessor *pp,
   mhd_assert ( (NULL != value_start) || (NULL == value_end) );
   mhd_assert ( (NULL == last_escape) || (NULL != value_start) );
   /* move remaining input from previous round into processing buffer */
-  memcpy (xbuf,
-          pp->xbuf,
-          pp->xbuf_pos);
+  if (0 != pp->xbuf_pos)
+    memcpy (xbuf,
+            pp->xbuf,
+            pp->xbuf_pos);
   xoff = pp->xbuf_pos;
   pp->xbuf_pos = 0;
   if ( (NULL != last_escape) &&
@@ -460,10 +461,13 @@ process_value (struct MHD_PostProcessor *pp,
     pp->value_offset += xoff;
     if (cut)
       break;
-    xbuf[delta] = '%';        /* undo 0-termination */
-    memmove (xbuf,
-             &xbuf[delta],
-             clen);
+    if (0 != clen)
+    {
+      xbuf[delta] = '%';        /* undo 0-termination */
+      memmove (xbuf,
+               &xbuf[delta],
+               clen);
+    }
     xoff = clen;
   }
 }