CVE-2023-53755

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> dmaengine: ptdma: check for null desc before calling pt_cmd_callback<br /> <br /> Resolves a panic that can occur on AMD systems, typically during host<br /> shutdown, after the PTDMA driver had been exercised. The issue was<br /> the pt_issue_pending() function is mistakenly assuming that there will<br /> be at least one descriptor in the Submitted queue when the function<br /> is called. However, it is possible that both the Submitted and Issued<br /> queues could be empty, which could result in pt_cmd_callback() being<br /> mistakenly called with a NULL pointer.<br /> Ref: Bugzilla Bug 216856.