Fix: Potential Vulnerability in Cloned Function

[tabudz]

Description This PR fixes a security vulnerability in vq_endchains() that was cloned from acrn-hypervisor but did not receive the security patch. The original issue was reported and fixed under https://github.com/projectacrn/acrn-hypervisor/commit/154fe59531c12b82e26d1b24b5531f5066d224f5. This PR applies the same patch to eliminate the vulnerability.

References https://nvd.nist.gov/vuln/detail/CVE-2021-36143 https://github.com/projectacrn/acrn-hypervisor/commit/154fe59531c12b82e26d1b24b5531f5066d224f5