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crypto: testmgr - Use kmalloc memory for RSA input 

As akcipher uses an SG interface, you must not use vmalloc memory
as input for it.  This patch fixes testmgr to copy the vmalloc
test vectors to kmalloc memory before running the test.

This patch also removes a superfluous sg_virt call in do_test_rsa.

Cc: <stable@vger.kernel.org>
Reported-by: Anatoly Pugachev <matorola@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2016-05-05 16:42:49 +08:00
parent 58446fef57
commit df27b26f04
1 changed files with 22 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
crypto/testmgr.c
View File

@ -1776,6 +1776,7 @@ static int alg_test_drbg(const struct alg_test_desc *desc, const char *driver,
static int do_test_rsa(struct crypto_akcipher *tfm,
struct akcipher_testvec *vecs)
{
char *xbuf[XBUFSIZE];
struct akcipher_request *req;
void *outbuf_enc = NULL;
void *outbuf_dec = NULL;
@ -1784,9 +1785,12 @@ static int do_test_rsa(struct crypto_akcipher *tfm,
int err = -ENOMEM;
struct scatterlist src, dst, src_tab[2];
if (testmgr_alloc_buf(xbuf))
return err;
req = akcipher_request_alloc(tfm, GFP_KERNEL);
if (!req)
return err;
goto free_xbuf;
init_completion(&result.completion);
@ -1804,9 +1808,14 @@ static int do_test_rsa(struct crypto_akcipher *tfm,
if (!outbuf_enc)
goto free_req;
if (WARN_ON(vecs->m_size > PAGE_SIZE))
goto free_all;
memcpy(xbuf[0], vecs->m, vecs->m_size);
sg_init_table(src_tab, 2);
sg_set_buf(&src_tab[0], vecs->m, 8);
sg_set_buf(&src_tab[1], vecs->m + 8, vecs->m_size - 8);
sg_set_buf(&src_tab[0], xbuf[0], 8);
sg_set_buf(&src_tab[1], xbuf[0] + 8, vecs->m_size - 8);
sg_init_one(&dst, outbuf_enc, out_len_max);
akcipher_request_set_crypt(req, src_tab, &dst, vecs->m_size,
out_len_max);
@ -1825,7 +1834,7 @@ static int do_test_rsa(struct crypto_akcipher *tfm,
goto free_all;
}
/* verify that encrypted message is equal to expected */
if (memcmp(vecs->c, sg_virt(req->dst), vecs->c_size)) {
if (memcmp(vecs->c, outbuf_enc, vecs->c_size)) {
pr_err("alg: rsa: encrypt test failed. Invalid output\n");
err = -EINVAL;
goto free_all;
@ -1840,7 +1849,13 @@ static int do_test_rsa(struct crypto_akcipher *tfm,
err = -ENOMEM;
goto free_all;
}
sg_init_one(&src, vecs->c, vecs->c_size);
if (WARN_ON(vecs->c_size > PAGE_SIZE))
goto free_all;
memcpy(xbuf[0], vecs->c, vecs->c_size);
sg_init_one(&src, xbuf[0], vecs->c_size);
sg_init_one(&dst, outbuf_dec, out_len_max);
init_completion(&result.completion);
akcipher_request_set_crypt(req, &src, &dst, vecs->c_size, out_len_max);
@ -1867,6 +1882,8 @@ free_all:
kfree(outbuf_enc);
free_req:
akcipher_request_free(req);
free_xbuf:
testmgr_free_buf(xbuf);
return err;
}