This is a note to let you know that I've just added the patch titled
crypto: testmgr - Use kmalloc memory for RSA input
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
crypto-testmgr-use-kmalloc-memory-for-rsa-input.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From df27b26f04ed388ff4cc2b5d8cfdb5d97678816f Mon Sep 17 00:00:00 2001
From: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Date: Thu, 5 May 2016 16:42:49 +0800
Subject: crypto: testmgr - Use kmalloc memory for RSA input
From: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
commit df27b26f04ed388ff4cc2b5d8cfdb5d97678816f upstream.
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.
Reported-by: Anatoly Pugachev <matorola@xxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
crypto/testmgr.c | 27 ++++++++++++++++++++++-----
1 file changed, 22 insertions(+), 5 deletions(-)
--- a/crypto/testmgr.c
+++ b/crypto/testmgr.c
@@ -1849,6 +1849,7 @@ static int alg_test_drbg(const struct al
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;
@@ -1857,9 +1858,12 @@ static int do_test_rsa(struct crypto_akc
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);
@@ -1877,9 +1881,14 @@ static int do_test_rsa(struct crypto_akc
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);
@@ -1898,7 +1907,7 @@ static int do_test_rsa(struct crypto_akc
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;
@@ -1913,7 +1922,13 @@ static int do_test_rsa(struct crypto_akc
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);
@@ -1940,6 +1955,8 @@ free_all:
kfree(outbuf_enc);
free_req:
akcipher_request_free(req);
+free_xbuf:
+ testmgr_free_buf(xbuf);
return err;
}
Patches currently in stable-queue which might be from herbert@xxxxxxxxxxxxxxxxxxx are
queue-4.4/crypto-testmgr-use-kmalloc-memory-for-rsa-input.patch
queue-4.4/crypto-qat-fix-invalid-pf2vf_resp_wq-logic.patch
queue-4.4/crypto-hash-fix-page-length-clamping-in-hash-walk.patch
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