From: Jianfeng Tan <jianfeng.tan@intel.com>
To: dev@dpdk.org
Cc: yuanhan.liu@linux.intel.com, huawei.xie@intel.com,
michalx.k.jastrzebski@intel.com,
Jianfeng Tan <jianfeng.tan@intel.com>
Subject: [dpdk-dev] [PATCH] net/virtio: fix null pointer dereference
Date: Tue, 5 Jul 2016 11:42:59 +0000 [thread overview]
Message-ID: <1467718979-20904-1-git-send-email-jianfeng.tan@intel.com> (raw)
There is a logic bug in this code, that could lead to null pointer
dereference when cvq is NULL. Fix this problem by changing logic
_and_ to logic _or_.
>> CID 127480: Null pointer dereferences (FORWARD_NULL)
>> Dereferencing null pointer "cvq".
if (!cvq && !cvq->vq) {
...
}
Coverity issue: 127480
Fixes: 01ad44fd374f ("net/virtio: split Rx/Tx queue")
Signed-off-by: Jianfeng Tan <jianfeng.tan@intel.com>
---
drivers/net/virtio/virtio_ethdev.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index 480daa3..828afef 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -166,7 +166,7 @@ virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl,
ctrl->status = status;
- if (!cvq && !cvq->vq) {
+ if (!cvq || !cvq->vq) {
PMD_INIT_LOG(ERR, "Control queue is not supported.");
return -1;
}
--
2.1.4
next reply other threads:[~2016-07-05 11:43 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-05 11:42 Jianfeng Tan [this message]
2016-07-05 12:14 ` Yuanhan Liu
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