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* [dpdk-stable] [PATCH v2] net/virtio: fix of untrusted scalar value
       [not found] <20170920091917.3929-1-danielx.t.mrzyglod@intel.com>
@ 2017-09-20 13:25 ` Daniel Mrzyglod
  2017-09-22 15:21   ` [dpdk-stable] [PATCH v3] " Daniel Mrzyglod
  0 siblings, 1 reply; 3+ messages in thread
From: Daniel Mrzyglod @ 2017-09-20 13:25 UTC (permalink / raw)
  To: yliu; +Cc: dev, Daniel Mrzyglod, jianfeng.tan, stable

The unscrutinized value may be incorrectly assumed to be within a certain
range by later operations.

In vhost_user_read: An unscrutinized value from an untrusted source used
in a trusted context - the value of sz_payload may be harmfull and we need
limit them to the max value of payload.

Coverity issue: 139601

Fixes: 6a84c37e3975 ("net/virtio-user: add vhost-user adapter layer")
Cc: jianfeng.tan@intel.com
Cc: stable@stable@dpdk.org

Signed-off-by: Daniel Mrzyglod <danielx.t.mrzyglod@intel.com>
---
v2:
* Add Cc for stable in gitlog massage
* Add Coverity line
* v1 was acked by Acked-by: Jianfeng Tan <jianfeng.tan@intel.com>

 drivers/net/virtio/virtio_user/vhost_user.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/virtio/virtio_user/vhost_user.c b/drivers/net/virtio/virtio_user/vhost_user.c
index 4ad7b21..b490336 100644
--- a/drivers/net/virtio/virtio_user/vhost_user.c
+++ b/drivers/net/virtio/virtio_user/vhost_user.c
@@ -130,6 +130,10 @@ vhost_user_read(int fd, struct vhost_user_msg *msg)
 	}
 
 	sz_payload = msg->size;
+
+	if (sz_payload > sizeof(msg->payload))
+		goto fail;
+
 	if (sz_payload) {
 		ret = recv(fd, (void *)((char *)msg + sz_hdr), sz_payload, 0);
 		if (ret < sz_payload) {
-- 
2.7.4

^ permalink raw reply	[flat|nested] 3+ messages in thread

* [dpdk-stable] [PATCH v3] net/virtio: fix of untrusted scalar value
  2017-09-20 13:25 ` [dpdk-stable] [PATCH v2] net/virtio: fix of untrusted scalar value Daniel Mrzyglod
@ 2017-09-22 15:21   ` Daniel Mrzyglod
  2017-09-27  9:25     ` Yuanhan Liu
  0 siblings, 1 reply; 3+ messages in thread
From: Daniel Mrzyglod @ 2017-09-22 15:21 UTC (permalink / raw)
  To: yliu; +Cc: dev, Daniel Mrzyglod, jianfeng.tan, stable

The unscrutinized value may be incorrectly assumed to be within a certain
range by later operations.

In vhost_user_read: An unscrutinized value from an untrusted source used
in a trusted context - the value of sz_payload may be harmfull and we need
limit them to the max value of payload.

Coverity issue: 139601

Fixes: 6a84c37e3975 ("net/virtio-user: add vhost-user adapter layer")
Cc: jianfeng.tan@intel.com
Cc: stable@dpdk.org

Signed-off-by: Daniel Mrzyglod <danielx.t.mrzyglod@intel.com>
---
v3:
* there were wrong v2 email adress for stable dpdk mailinglist
* fix compilation errors

v2:
* Add Cc for stable in gitlog massage
* Add Coverity line
* v1 was acked by Acked-by: Jianfeng Tan <jianfeng.tan@intel.com>


 drivers/net/virtio/virtio_user/vhost_user.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/virtio/virtio_user/vhost_user.c b/drivers/net/virtio/virtio_user/vhost_user.c
index 4ad7b21..97bd832 100644
--- a/drivers/net/virtio/virtio_user/vhost_user.c
+++ b/drivers/net/virtio/virtio_user/vhost_user.c
@@ -130,6 +130,10 @@ vhost_user_read(int fd, struct vhost_user_msg *msg)
 	}
 
 	sz_payload = msg->size;
+
+	if ((size_t)sz_payload > sizeof(msg->payload))
+		goto fail;
+
 	if (sz_payload) {
 		ret = recv(fd, (void *)((char *)msg + sz_hdr), sz_payload, 0);
 		if (ret < sz_payload) {
-- 
2.7.4

^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [dpdk-stable] [PATCH v3] net/virtio: fix of untrusted scalar value
  2017-09-22 15:21   ` [dpdk-stable] [PATCH v3] " Daniel Mrzyglod
@ 2017-09-27  9:25     ` Yuanhan Liu
  0 siblings, 0 replies; 3+ messages in thread
From: Yuanhan Liu @ 2017-09-27  9:25 UTC (permalink / raw)
  To: Daniel Mrzyglod; +Cc: dev, jianfeng.tan, stable

On Fri, Sep 22, 2017 at 05:21:49PM +0200, Daniel Mrzyglod wrote:
> The unscrutinized value may be incorrectly assumed to be within a certain
> range by later operations.
> 
> In vhost_user_read: An unscrutinized value from an untrusted source used
> in a trusted context - the value of sz_payload may be harmfull and we need
> limit them to the max value of payload.
> 
> Coverity issue: 139601
> 
> Fixes: 6a84c37e3975 ("net/virtio-user: add vhost-user adapter layer")
> Cc: jianfeng.tan@intel.com
> Cc: stable@dpdk.org
> 
> Signed-off-by: Daniel Mrzyglod <danielx.t.mrzyglod@intel.com>

FYI, you should put the Ack from Jianfeng here, so that it will be
there when I apply your patch. Otherwise, I have to add it back manually.

But never mind, I have done it this time. So, applied to dpdk-next-virtio.

Thanks.

	--yliu

> ---
> v3:
> * there were wrong v2 email adress for stable dpdk mailinglist
> * fix compilation errors
> 
> v2:
> * Add Cc for stable in gitlog massage
> * Add Coverity line
> * v1 was acked by Acked-by: Jianfeng Tan <jianfeng.tan@intel.com>
> 
> 
>  drivers/net/virtio/virtio_user/vhost_user.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/net/virtio/virtio_user/vhost_user.c b/drivers/net/virtio/virtio_user/vhost_user.c
> index 4ad7b21..97bd832 100644
> --- a/drivers/net/virtio/virtio_user/vhost_user.c
> +++ b/drivers/net/virtio/virtio_user/vhost_user.c
> @@ -130,6 +130,10 @@ vhost_user_read(int fd, struct vhost_user_msg *msg)
>  	}
>  
>  	sz_payload = msg->size;
> +
> +	if ((size_t)sz_payload > sizeof(msg->payload))
> +		goto fail;
> +
>  	if (sz_payload) {
>  		ret = recv(fd, (void *)((char *)msg + sz_hdr), sz_payload, 0);
>  		if (ret < sz_payload) {
> -- 
> 2.7.4

^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2017-09-27  9:25 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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     [not found] <20170920091917.3929-1-danielx.t.mrzyglod@intel.com>
2017-09-20 13:25 ` [dpdk-stable] [PATCH v2] net/virtio: fix of untrusted scalar value Daniel Mrzyglod
2017-09-22 15:21   ` [dpdk-stable] [PATCH v3] " Daniel Mrzyglod
2017-09-27  9:25     ` Yuanhan Liu

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