commit 159c524df847edc5737f7740ed8c864d0f3ba9d2
author Manuel Pégourié-Gonnard <mpg@elzevir.fr> Thu Apr 30 11:15:22 2015 +0200
committer Manuel Pégourié-Gonnard <mpg@elzevir.fr> Thu Apr 30 11:21:18 2015 +0200
tree 0717085d4e99173a537d6b0afb5b8cb8cf380e9c
parent 7b12492c7704e3688c2f39ccd443ae2443a1264c

Fix undefined behaviour in x509

library/x509_crl.c

diff --git a/library/x509_crl.c b/library/x509_crl.c
index e2076a6..de2079f 100644
--- a/library/x509_crl.c
+++ b/library/x509_crl.c
@@ -462,7 +462,8 @@
     if( crl->sig_oid1.len != crl->sig_oid2.len ||
         memcmp( crl->sig_oid1.p, crl->sig_oid2.p, crl->sig_oid1.len ) != 0 ||
         sig_params1.len != sig_params2.len ||
-        memcmp( sig_params1.p, sig_params2.p, sig_params1.len ) != 0 )
+        ( sig_params1.len != 0 &&
+          memcmp( sig_params1.p, sig_params2.p, sig_params1.len ) != 0 ) )
     {
         x509_crl_free( crl );
         return( POLARSSL_ERR_X509_SIG_MISMATCH );