crypto: hisilicon/hpre - fix memory leak in hpre_curve25519_src_init()

mainline inclusion
from mainline-v5.17-rc1
commit 51fa916b
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5AFY1
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=51fa916b81e5



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hpre_curve25519_src_init() allocates memory for 'ptr' before calling
memcmp(). If memcmp() returns 0, the function will return '-EINVAL'
without freeing memory.

Signed-off-by: Weili Qian <qianweili@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Jiangshui Yang <yangjiangshui@h-partners.com>
Reviewed-by: Yang Shen <shenyang39@huawei.com>
Acked-by: Xie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>