commit 8e1e46ebb505e6973860839e4dee8e89f575ee1f
author Gilles Peskine <Gilles.Peskine@arm.com> Mon Feb 08 22:02:12 2021 +0100
committer Gilles Peskine <Gilles.Peskine@arm.com> Tue Feb 16 15:46:06 2021 +0100
tree 9abdcb0c8bf823ed4579256ae4f4f3fed06c5791
parent 8133abd746950a06b06af1f34366d75e66442801

Fix the use of unitialized memory with MBEDTLS_TEST_NULL_ENTROPY

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>

library/entropy_poll.c

diff --git a/library/entropy_poll.c b/library/entropy_poll.c
index 5250a7b..27465f2 100644
--- a/library/entropy_poll.c
+++ b/library/entropy_poll.c
@@ -205,13 +205,13 @@
 {
     ((void) data);
     ((void) output);
-    *olen = 0;
 
+    *olen = 0;
     if( len < sizeof(unsigned char) )
         return( 0 );
 
+    output[0] = 0;
     *olen = sizeof(unsigned char);
-
     return( 0 );
 }
 #endif