SM2算法存在内存泄漏问题

[Zak-Young]

在使用asan编译GmSSl后执行GmSSl命令，发现GmSSl的SM2算法存在内存泄漏。
执行 gmssl sm2utl -verify -in GRCh38.103.gtf -sigfile result.sign -pubin -inkey public.pem -passin pass:testgmssl -id "5"
本身这是一个构造的会失败的用例，其中GRCh38.103.gtf是一个大小超出SM2算法处理范围的压缩包。执行该命令暴露出如下地址消毒问题：

Direct leak of 112 byte(s) in 1 object(s) allocated from:
#0 0xffff93199404 in malloc (/usr/lib64/libasan.so.6+0xaa404)
#1 0xffff92eb5ac0 in CRYPTO_zalloc (/home/XXX/opt/gmssl/lib/libcrypto.so.1.1+0x14cac0)
#2 0xffff92e093d8 in BIO_new (/home/XXX/opt/gmssl/lib/libcrypto.so.1.1+0xa03d8)
#3 0xffff92e0df18 in BIO_new_file (/home/XXX/opt/gmssl/lib/libcrypto.so.1.1+0xa4f18)
#4 0x450b08 in sm2utl_main (/home/XXX/opt/gmssl/bin/gmssl+0x450b08)
#5 0x431370 in do_cmd (/home/XXX/opt/gmssl/bin/gmssl+0x431370)
#6 0x41c7bc in main (/home/XXX/opt/gmssl/bin/gmssl+0x41c7bc)
#7 0xffff92be4ffc (/usr/lib64/libc.so.6+0x2affc)
#8 0xffff92be50d4 in __libc_start_main (/usr/lib64/libc.so.6+0x2b0d4)
#9 0x41c82c in _start (/home/XXX/opt/gmssl/bin/gmssl+0x41c82c)

Direct leak of 112 byte(s) in 1 object(s) allocated from:
#0 0xffff93199404 in malloc (/usr/lib64/libasan.so.6+0xaa404)
#1 0xffff92eb5ac0 in CRYPTO_zalloc (/home/XXX/opt/gmssl/lib/libcrypto.so.1.1+0x14cac0)
#2 0xffff92e093d8 in BIO_new (/home/XXX/opt/gmssl/lib/libcrypto.so.1.1+0xa03d8)
#3 0xffff92e0df18 in BIO_new_file (/home/XXX/opt/gmssl/lib/libcrypto.so.1.1+0xa4f18)
#4 0x4213f8 in bio_open_default (/home/XXX/opt/gmssl/bin/gmssl+0x4213f8)
#5 0x450ad4 in sm2utl_main (/home/XXX/opt/gmssl/bin/gmssl+0x450ad4)
#6 0x431370 in do_cmd (/home/XXX/opt/gmssl/bin/gmssl+0x431370)
#7 0x41c7bc in main (/home/XXX/opt/gmssl/bin/gmssl+0x41c7bc)
#8 0xffff92be4ffc (/usr/lib64/libc.so.6+0x2affc)
#9 0xffff92be50d4 in __libc_start_main (/usr/lib64/libc.so.6+0x2b0d4)
#10 0x41c82c in _start (/home/XXX/opt/gmssl/bin/gmssl+0x41c82c)