CVE-2021-47203

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> scsi: lpfc: Fix list_add() corruption in lpfc_drain_txq()<br /> <br /> When parsing the txq list in lpfc_drain_txq(), the driver attempts to pass<br /> the requests to the adapter. If such an attempt fails, a local "fail_msg"<br /> string is set and a log message output. The job is then added to a<br /> completions list for cancellation.<br /> <br /> Processing of any further jobs from the txq list continues, but since<br /> "fail_msg" remains set, jobs are added to the completions list regardless<br /> of whether a wqe was passed to the adapter. If successfully added to<br /> txcmplq, jobs are added to both lists resulting in list corruption.<br /> <br /> Fix by clearing the fail_msg string after adding a job to the completions<br /> list. This stops the subsequent jobs from being added to the completions<br /> list unless they had an appropriate failure.