* [PATCH v2] virtio-crypto: fix memory-leak
@ 2022-08-16 9:43 Lei He
2022-08-24 8:38 ` PING: " Lei He
0 siblings, 1 reply; 3+ messages in thread
From: Lei He @ 2022-08-16 9:43 UTC (permalink / raw)
To: mst, herbert, arei.gonglei
Cc: virtualization, linux-crypto, linux-kernel, pizhenwei, lei he
From: lei he <helei.sig11@bytedance.com>
Fix memory-leak for virtio-crypto akcipher request, this problem is
introduced by 59ca6c93387d3(virtio-crypto: implement RSA algorithm).
The leak can be reproduced and tested with the following script
inside virtual machine:
#!/bin/bash
LOOP_TIMES=10000
# required module: pkcs8_key_parser, virtio_crypto
modprobe pkcs8_key_parser # if CONFIG_PKCS8_PRIVATE_KEY_PARSER=m
modprobe virtio_crypto # if CONFIG_CRYPTO_DEV_VIRTIO=m
rm -rf /tmp/data
dd if=/dev/random of=/tmp/data count=1 bs=230
# generate private key and self-signed cert
openssl req -nodes -x509 -newkey rsa:2048 -keyout key.pem \
-outform der -out cert.der \
-subj "/C=CN/ST=GD/L=SZ/O=vihoo/OU=dev/CN=always.com/emailAddress=yy@always.com"
# convert private key from pem to der
openssl pkcs8 -in key.pem -topk8 -nocrypt -outform DER -out key.der
# add key
PRIV_KEY_ID=`cat key.der | keyctl padd asymmetric test_priv_key @s`
echo "priv key id = "$PRIV_KEY_ID
PUB_KEY_ID=`cat cert.der | keyctl padd asymmetric test_pub_key @s`
echo "pub key id = "$PUB_KEY_ID
# query key
keyctl pkey_query $PRIV_KEY_ID 0
keyctl pkey_query $PUB_KEY_ID 0
# here we only run pkey_encrypt becasuse it is the fastest interface
function bench_pub() {
keyctl pkey_encrypt $PUB_KEY_ID 0 /tmp/data enc=pkcs1 >/tmp/enc.pub
}
# do bench_pub in loop to obtain the memory leak
for (( i = 0; i < ${LOOP_TIMES}; ++i )); do
bench_pub
done
Signed-off-by: lei he <helei.sig11@bytedance.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Gonglei <arei.gonglei@huawei.com>
---
drivers/crypto/virtio/virtio_crypto_akcipher_algs.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c b/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c
index 2a60d0525cde..168195672e2e 100644
--- a/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c
+++ b/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c
@@ -56,6 +56,10 @@ static void virtio_crypto_akcipher_finalize_req(
struct virtio_crypto_akcipher_request *vc_akcipher_req,
struct akcipher_request *req, int err)
{
+ kfree(vc_akcipher_req->src_buf);
+ kfree(vc_akcipher_req->dst_buf);
+ vc_akcipher_req->src_buf = NULL;
+ vc_akcipher_req->dst_buf = NULL;
virtcrypto_clear_request(&vc_akcipher_req->base);
crypto_finalize_akcipher_request(vc_akcipher_req->base.dataq->engine, req, err);
base-commit: 568035b01cfb107af8d2e4bd2fb9aea22cf5b868
--
2.20.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* PING: [PATCH v2] virtio-crypto: fix memory-leak
2022-08-16 9:43 [PATCH v2] virtio-crypto: fix memory-leak Lei He
@ 2022-08-24 8:38 ` Lei He
2022-09-02 2:44 ` Lei He
0 siblings, 1 reply; 3+ messages in thread
From: Lei He @ 2022-08-24 8:38 UTC (permalink / raw)
To: mst, herbert, arei.gonglei
Cc: helei.sig11, virtualization, linux-crypto, linux-kernel, pizhenwei
On 2022/8/16 下午5:43, Lei He wrote:
> From: lei he <helei.sig11@bytedance.com>
>
> Fix memory-leak for virtio-crypto akcipher request, this problem is
> introduced by 59ca6c93387d3(virtio-crypto: implement RSA algorithm).
> The leak can be reproduced and tested with the following script
> inside virtual machine:
>
> Signed-off-by: lei he <helei.sig11@bytedance.com>
> Acked-by: Michael S. Tsirkin <mst@redhat.com>
> Reviewed-by: Gonglei <arei.gonglei@huawei.com>
> ---
> drivers/crypto/virtio/virtio_crypto_akcipher_algs.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c b/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c
> index 2a60d0525cde..168195672e2e 100644
> --- a/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c
> +++ b/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c
> @@ -56,6 +56,10 @@ static void virtio_crypto_akcipher_finalize_req(
> struct virtio_crypto_akcipher_request *vc_akcipher_req,
> struct akcipher_request *req, int err)
> {
> + kfree(vc_akcipher_req->src_buf);
> + kfree(vc_akcipher_req->dst_buf);
> + vc_akcipher_req->src_buf = NULL;
> + vc_akcipher_req->dst_buf = NULL;
> virtcrypto_clear_request(&vc_akcipher_req->base);
>
> crypto_finalize_akcipher_request(vc_akcipher_req->base.dataq->engine, req, err);
>
> base-commit: 568035b01cfb107af8d2e4bd2fb9aea22cf5b868
PING.
Best regards,
Lei He
--
helei.sig11@bytedance.com
^ permalink raw reply [flat|nested] 3+ messages in thread
* PING: [PATCH v2] virtio-crypto: fix memory-leak
2022-08-24 8:38 ` PING: " Lei He
@ 2022-09-02 2:44 ` Lei He
0 siblings, 0 replies; 3+ messages in thread
From: Lei He @ 2022-09-02 2:44 UTC (permalink / raw)
To: mst, herbert, arei.gonglei
Cc: helei.sig11, virtualization, linux-crypto, linux-kernel, pizhenwei
On 2022/8/24 下午4:38, Lei He wrote:
> On 2022/8/16 下午5:43, Lei He wrote:
>> From: lei he <helei.sig11@bytedance.com>
>>
>> Fix memory-leak for virtio-crypto akcipher request, this problem is
>> introduced by 59ca6c93387d3(virtio-crypto: implement RSA algorithm).
>> The leak can be reproduced and tested with the following script
>> inside virtual machine:
PING
Best regards,
Lei He
--
helei.sig11@bytedance.com
^ permalink raw reply [flat|nested] 3+ messages in thread
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