scsi: lpfc: Check for hdwq null ptr when cleaning up lpfc_vport structure

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: scsi: lpfc: Check for hdwq null ptr when cleaning up lpfc_vport structure If a call to lpfc_sli4_read_rev() from lpfc_sli4_hba_setup() fails, the resultant cleanup routine lpfc_sli4_vport_delete_fcp_xri_aborted() may occur before sli4_hba.hdwqs are allocated. This may result in a null pointer dereference when attempting to take the abts_io_buf_list_lock for the first hardware queue. Fix by adding a null ptr check on phba->sli4_hba.hdwq and early return because this situation means there must have been an error during port initialization.

References

• https://git.kernel.org/stable/c/6711ce7e9de4eb1a541ef30638df1294ea4267f8
• https://git.kernel.org/stable/c/74bdf54a847dab209d2a8f65852f59b7fa156175
• https://git.kernel.org/stable/c/5e25ee1ecec91c61a8acf938ad338399cad464de
• https://git.kernel.org/stable/c/add68606a01dcccf18837a53e85b85caf0693b4b
• https://git.kernel.org/stable/c/7925dd68807cc8fd755b04ca99e7e6f1c04392e8
• https://git.kernel.org/stable/c/571617f171f723b05f02d154a2e549a17eab4935
• https://git.kernel.org/stable/c/d3f55f46bb37a8ec73bfe3cfe36e3ecfa2945dfa
• https://git.kernel.org/stable/c/46a0602c24d7d425dd8e00c749cd64a934aac7ec
• https://git.kernel.org/stable/c/6698796282e828733cde3329c887b4ae9e5545e9