[tor-commits] [tor/master] Work around a false positive in Coverity.

[nickm at torproject.org]

commit 95af91565bd846be0b199fbc02d7197bf771e867
Author: Sebastian Hahn <sebastian at torproject.org>
Date:   Fri Dec 2 06:15:31 2011 +0100

    Work around a false positive in Coverity.
    
    Fixes cid 501 and 502.
---
 src/common/crypto.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/common/crypto.c b/src/common/crypto.c
index 62b0bce..2aa3fc9 100644
--- a/src/common/crypto.c
+++ b/src/common/crypto.c
@@ -1912,9 +1912,12 @@ crypto_get_stored_dynamic_dh_modulus(const char *fname)
   }
 
   /* 'fname' contains the DH parameters stored in base64-ed DER
-     format. We are only interested in the DH modulus. */
+   *  format. We are only interested in the DH modulus.
+   *  NOTE: We allocate more storage here than we need. Since we're already
+   *  doing that, we can also add 1 byte extra to appease Coverity's
+   *  scanner. */
 
-  cp = base64_decoded_dh = tor_malloc_zero(strlen(contents));
+  cp = base64_decoded_dh = tor_malloc_zero(strlen(contents) + 1);
   length = base64_decode((char *)base64_decoded_dh, strlen(contents),
                          contents, strlen(contents));
   if (length < 0) {