crypto: sm2 - Fix crash caused by uninitialized context
In sm2_compute_z_digest() function, the newly allocated structure
mpi_ec_ctx is used, but forget to initialize it, which will cause
a crash when performing subsequent operations.
Fixes: e5221fa6a3
("KEYS: asymmetric: Move sm2 code into x509_public_key")
Cc: stable@vger.kernel.org # v6.5
Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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0bb80ecc33
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@ -278,10 +278,14 @@ int sm2_compute_z_digest(struct shash_desc *desc,
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if (!ec)
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return -ENOMEM;
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err = __sm2_set_pub_key(ec, key, keylen);
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err = sm2_ec_ctx_init(ec);
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if (err)
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goto out_free_ec;
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err = __sm2_set_pub_key(ec, key, keylen);
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if (err)
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goto out_deinit_ec;
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bits_len = SM2_DEFAULT_USERID_LEN * 8;
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entl[0] = bits_len >> 8;
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entl[1] = bits_len & 0xff;
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