kernel: scsi: qla2xxx: Fix improper freeing of purex item

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Fix improper freeing of purex item In qla2xxxprocesspurlsiocb, an item is allocated via qla27xxcopymultiplepkt, which internally calls qla24xxallocpurexitem. The qla24xxallocpurexitem function may return a...