hw/virtio/virtio-crypto.c | 20 +++++++++++--------- 1 file changed, 11 insertions(+), 9 deletions(-)
Ensure op_info is not NULL in case of QCRYPTODEV_BACKEND_ALG_SYM algtype.
Fixes: 0e660a6f90a ("crypto: Introduce RSA algorithm")
Signed-off-by: Mauro Matteo Cascella <mcascell@redhat.com>
Reported-by: Yiming Tao <taoym@zju.edu.cn>
---
v2:
- updated 'Fixes:' tag
hw/virtio/virtio-crypto.c | 20 +++++++++++---------
1 file changed, 11 insertions(+), 9 deletions(-)
diff --git a/hw/virtio/virtio-crypto.c b/hw/virtio/virtio-crypto.c
index 2fe804510f..c729a1f79e 100644
--- a/hw/virtio/virtio-crypto.c
+++ b/hw/virtio/virtio-crypto.c
@@ -476,15 +476,17 @@ static void virtio_crypto_free_request(VirtIOCryptoReq *req)
size_t max_len;
CryptoDevBackendSymOpInfo *op_info = req->op_info.u.sym_op_info;
- max_len = op_info->iv_len +
- op_info->aad_len +
- op_info->src_len +
- op_info->dst_len +
- op_info->digest_result_len;
-
- /* Zeroize and free request data structure */
- memset(op_info, 0, sizeof(*op_info) + max_len);
- g_free(op_info);
+ if (op_info) {
+ max_len = op_info->iv_len +
+ op_info->aad_len +
+ op_info->src_len +
+ op_info->dst_len +
+ op_info->digest_result_len;
+
+ /* Zeroize and free request data structure */
+ memset(op_info, 0, sizeof(*op_info) + max_len);
+ g_free(op_info);
+ }
} else if (req->flags == QCRYPTODEV_BACKEND_ALG_ASYM) {
CryptoDevBackendAsymOpInfo *op_info = req->op_info.u.asym_op_info;
if (op_info) {
--
2.40.1
LGTM. Thanks! Reviewed-by: zhenwei pi<pizhenwei@bytedance.com> On 5/9/23 15:53, Mauro Matteo Cascella wrote: > Ensure op_info is not NULL in case of QCRYPTODEV_BACKEND_ALG_SYM algtype. > > Fixes: 0e660a6f90a ("crypto: Introduce RSA algorithm") > Signed-off-by: Mauro Matteo Cascella <mcascell@redhat.com> > Reported-by: Yiming Tao <taoym@zju.edu.cn> > --- > v2: > - updated 'Fixes:' tag > > hw/virtio/virtio-crypto.c | 20 +++++++++++--------- > 1 file changed, 11 insertions(+), 9 deletions(-) > > diff --git a/hw/virtio/virtio-crypto.c b/hw/virtio/virtio-crypto.c > index 2fe804510f..c729a1f79e 100644 > --- a/hw/virtio/virtio-crypto.c > +++ b/hw/virtio/virtio-crypto.c > @@ -476,15 +476,17 @@ static void virtio_crypto_free_request(VirtIOCryptoReq *req) > size_t max_len; > CryptoDevBackendSymOpInfo *op_info = req->op_info.u.sym_op_info; > > - max_len = op_info->iv_len + > - op_info->aad_len + > - op_info->src_len + > - op_info->dst_len + > - op_info->digest_result_len; > - > - /* Zeroize and free request data structure */ > - memset(op_info, 0, sizeof(*op_info) + max_len); > - g_free(op_info); > + if (op_info) { > + max_len = op_info->iv_len + > + op_info->aad_len + > + op_info->src_len + > + op_info->dst_len + > + op_info->digest_result_len; > + > + /* Zeroize and free request data structure */ > + memset(op_info, 0, sizeof(*op_info) + max_len); > + g_free(op_info); > + } > } else if (req->flags == QCRYPTODEV_BACKEND_ALG_ASYM) { > CryptoDevBackendAsymOpInfo *op_info = req->op_info.u.asym_op_info; > if (op_info) { -- zhenwei pi
> -----Original Message----- > From: Mauro Matteo Cascella [mailto:mcascell@redhat.com] > Sent: Tuesday, May 9, 2023 3:53 PM > To: qemu-devel@nongnu.org > Cc: mst@redhat.com; Gonglei (Arei) <arei.gonglei@huawei.com>; > pizhenwei@bytedance.com; taoym@zju.edu.cn; mcascell@redhat.com > Subject: [PATCH v2] virtio-crypto: fix NULL pointer dereference in > virtio_crypto_free_request > > Ensure op_info is not NULL in case of QCRYPTODEV_BACKEND_ALG_SYM > algtype. > > Fixes: 0e660a6f90a ("crypto: Introduce RSA algorithm") > Signed-off-by: Mauro Matteo Cascella <mcascell@redhat.com> > Reported-by: Yiming Tao <taoym@zju.edu.cn> > --- > v2: > - updated 'Fixes:' tag > > hw/virtio/virtio-crypto.c | 20 +++++++++++--------- > 1 file changed, 11 insertions(+), 9 deletions(-) > Reviewed-by: Gonglei <arei.gonglei@huawei.com> Regards, -Gonglei > diff --git a/hw/virtio/virtio-crypto.c b/hw/virtio/virtio-crypto.c index > 2fe804510f..c729a1f79e 100644 > --- a/hw/virtio/virtio-crypto.c > +++ b/hw/virtio/virtio-crypto.c > @@ -476,15 +476,17 @@ static void > virtio_crypto_free_request(VirtIOCryptoReq *req) > size_t max_len; > CryptoDevBackendSymOpInfo *op_info = > req->op_info.u.sym_op_info; > > - max_len = op_info->iv_len + > - op_info->aad_len + > - op_info->src_len + > - op_info->dst_len + > - op_info->digest_result_len; > - > - /* Zeroize and free request data structure */ > - memset(op_info, 0, sizeof(*op_info) + max_len); > - g_free(op_info); > + if (op_info) { > + max_len = op_info->iv_len + > + op_info->aad_len + > + op_info->src_len + > + op_info->dst_len + > + op_info->digest_result_len; > + > + /* Zeroize and free request data structure */ > + memset(op_info, 0, sizeof(*op_info) + max_len); > + g_free(op_info); > + } > } else if (req->flags == QCRYPTODEV_BACKEND_ALG_ASYM) { > CryptoDevBackendAsymOpInfo *op_info = > req->op_info.u.asym_op_info; > if (op_info) { > -- > 2.40.1
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