crypto: af_alg - Fix socket double-free when accept fails

crypto: af_alg - Fix socket double-free when accept fails

Orabug: 23330749

[ Upstream commit a383292c86663bbc31ac62cc0c04fc77504636a6 ]

When we fail an accept(2) call we will end up freeing the socket
twice, once due to the direct sk_free call and once again through
newsock.

This patch fixes this by removing the sk_free call.

Cc: stable@vger.kernel.org
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
(cherry picked from commit fa988b35c2e40f38e57388a1a3f48de056e81dd3)

Signed-off-by: Dan Duval <dan.duval@oracle.com>