IBM Support

Platform dumps not saved on PowerVM based systems using BMC when initiating a platform dump to an LPAR

Flashes (Alerts)


Abstract

If a PowerVM-based system is managed by the Baseboard Management Controller (BMC) instead of the Hardware Management Console (HMC) and a platform dump is initiated and offloaded to a Linux logical partition (LPAR), then the platform dump does not get saved.

Content

Linux Releases Affected
SUSE Linux Enterprise Server (SLES) 15, Service Pack 3 and 4
Red Hat Enterprise Linux (RHEL) 8.6 and 9.0

IBM Systems Affected
All IBM Power Systems

Symptoms
This issue was caused by a regression introduced by CVE-2020-27777 that was meant to lock down RTAS calls from userspace exploit attempts. A special case was missing for the ibm,platform-dump RTAS call. As a result, offloaded dumps did not complete successfully. This issue is now corrected.

Workaround

None.

Fix Outlook

This fix is available for the following Linux releases:
SLES 15 SP3 (kernel 5.3.18-150300.59.81.1 and later)
SLES 15 SP4 (kernel 5.14.21-150400.24.11.1 and later)
This fix is not yet available for the following Linux releases:
RHEL 8.6
RHEL 9.0

Linux Grub changes to support Maximum Processor during CAS Negotiation are being worked on and will be included in future releases.

I/O Device Impacted

None.

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Document Information

Modified date:
12 September 2022

UID

ibm16614515

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