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Fix memory leak cause by race condition when creating public keys.

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Thanks to Ivan Nestlerode <inestlerode@us.ibm.com> for reporting this bug.
This commit is contained in:
Dr. Stephen Henson 2012-02-28 14:47:16 +00:00
parent 5c2bfad9b4
commit 33a688e806
1 changed files with 10 additions and 1 deletions
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11
crypto/asn1/x_pubkey.c
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@ -171,7 +171,16 @@ EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key)
goto error;
}
key->pkey = ret;
/* Check to see if another thread set key->pkey first */
CRYPTO_w_lock(CRYPTO_LOCK_EVP_PKEY);
if (key->pkey)
{
EVP_PKEY_free(ret);
ret = key->pkey;
}
else
key->pkey = ret;
CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY);
CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_EVP_PKEY);
return ret;