[LU-5633] not taking rq_lock when modify rq_resend

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.7.0
• Affects Version/s: Lustre 2.7.0
• Severity: 3
• Assignee: Niu Yawei (Inactive)
• Reporter: Niu Yawei (Inactive)

Description

In after_reply():

        /* retry indefinitely on EINPROGRESS */
        if (lustre_msg_get_status(req->rq_repmsg) == -EINPROGRESS &&
            ptlrpc_no_resend(req) == 0 && !req->rq_no_retry_einprogress) {
                time_t  now = cfs_time_current_sec();

                DEBUG_REQ(D_RPCTRACE, req, "Resending request on EINPROGRESS");
                req->rq_resend = 1;
                req->rq_nr_resend++;

rq_lock should be taken before modify rq_resend.