Fix potential NULL pointer dereference
In EC key generation, if allocation of struct ec_gen_ctx fails, values
provided by parameters are copied into the context at represented by a NULL
pointer. To fix this, prevent copy if allocation fails.
Signed-off-by: Juergen Christ <jchrist@linux.ibm.com>
Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/20055)
(cherry picked from commit
235ef96049dbe337a3c3c5d419dacbb5a81df1b3)