[dpdk-dev,v2] net/virtio: fix of untrusted scalar value
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Commit Message
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(+)
@@ -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) {