CVE-2023-53627

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

scsi: hisi_sas: Grab sas_dev lock when traversing the members of sas_dev.list

When freeing slots in function slot_complete_v3_hw(), it is possible that

sas_dev.list is being traversed elsewhere, and it may trigger a NULL

pointer exception, such as follows:

==>cq thread ==>scsi_eh_6

==>scsi_error_handler()

==>sas_eh_handle_sas_errors()

==>sas_scsi_find_task()

==>lldd_abort_task()

==>slot_complete_v3_hw() ==>hisi_sas_abort_task()

==>hisi_sas_slot_task_free() ==>dereg_device_v3_hw()

==>list_del_init() ==>list_for_each_entry_safe()

[ 7165.434918] sas: Enter sas_scsi_recover_host busy: 32 failed: 32

[ 7165.434926] sas: trying to find task 0x00000000769b5ba5

[ 7165.434927] sas: sas_scsi_find_task: aborting task 0x00000000769b5ba5

[ 7165.434940] hisi_sas_v3_hw 0000:b4:02.0: slot complete: task(00000000769b5ba5

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References