Linux Kernel Vulnerability in qla2xxx SCSI Driver Affects System Stability

CVE-2023-53322

What is CVE-2023-53322?

A vulnerability in the Linux kernel's qla2xxx SCSI driver can lead to system instability due to improper handling of I/O requests. Specifically, the terminate_rport_io function may conclude before ensuring that all I/O operations have returned, leaving the system at risk of resource mismanagement. This can occur particularly with FCP-2 devices, where I/Os may hang in hardware following a cable disconnection. The dev_loss_tmo timer triggers the terminate_rport_io call, which attempts final cleanup of resources without confirming the return of all outstanding I/Os first. It is essential to implement a wait mechanism for I/Os to return prior to resource release to mitigate system crashes and maintain stability.

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