Re: [PATCH v2] Check RSA_generate_key_ex return value

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On 03/12/2014 03:22 PM, Christophe Fergeau wrote:
This commit will cause the client connection to fail but qemu won't
segfault.
---
Changes since v1:
- don't leak BIO when RSA_generate_key_ex fails

diff --git a/server/reds.c b/server/reds.c
index c38fa40..6706754 100644
--- a/server/reds.c
+++ b/server/reds.c
@@ -1368,8 +1368,15 @@ static int reds_send_link_ack(RedLinkInfo *link)
          return FALSE;
      }
- RSA_generate_key_ex(link->tiTicketing.rsa, SPICE_TICKET_KEY_PAIR_LENGTH, link->tiTicketing.bn,
-                        NULL);
+    if (RSA_generate_key_ex(link->tiTicketing.rsa,
+                            SPICE_TICKET_KEY_PAIR_LENGTH,
+                            link->tiTicketing.bn,
+                            NULL) != 1) {
+        spice_warning("Failed to generate %d bits RSA key: %s",
+                      SPICE_TICKET_KEY_PAIR_LENGTH,
+                      ERR_error_string(ERR_get_error(), NULL));
+        goto end;
+    }
      link->tiTicketing.rsa_size = RSA_size(link->tiTicketing.rsa);
i2d_RSA_PUBKEY_bio(bio, link->tiTicketing.rsa);
Ack.
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