CVE-2022-49730 Information

Description

In the Linux kernel the following vulnerability has been resolved:

scsi: lpfc: Resolve NULL ptr dereference after an ELS LOGO is aborted

A use-after-free crash can occur after an ELS LOGO is aborted.

Specifically a nodelist structure is freed and then ndlp->vport->cfg_log_verbose is dereferenced in lpfc_nlp_get() when the discovery state machine is mistakenly called a second time with NLP_EVT_DEVICE_RM argument.

Rework lpfc_cmpl_els_logo() to prevent the duplicate calls to release a nodelist structure.

Reference

https://git.kernel.org/stable/c/5e83869e29448958f8ae2c6911f350318f75e4fc https://git.kernel.org/stable/c/b1b3440f437b75fb2a9b0cfe58df461e40eca474 https://git.kernel.org/stable/c/eea34ce23dc3a595695856dc73bb132a9c5a2902