CVE-2026-72023: octeontx2-pf: fix SQB pointer leak on init failure

From: Greg Kroah-Hartman <[email protected]>

Description
===========

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

octeontx2-pf: fix SQB pointer leak on init failure

otx2_init_hw_resources() initializes SQ aura and pool resources before
several later setup steps. On failure, err_free_sq_ptrs only frees SQB
pages, leaving the per-SQ sqb_ptrs arrays behind.

Use otx2_free_sq_res() for the SQ unwind path and let it free sqb_ptrs
even when sq->sqe has not been allocated yet.

The bug was first flagged by an experimental analysis tool we are
developing for kernel memory-management bugs while analyzing
v6.13-rc1. The tool is still under development and is not yet publicly
available. Manual inspection confirms that the bug is still
present in v7.1.1.

An x86_64 allyesconfig build showed no new warnings. As we do not have an
OcteonTX2 PF device and the corresponding AF mailbox setup to test with,
no runtime testing was able to be performed.

The Linux kernel CVE team has assigned CVE-2026-72023 to this issue.


Affected and fixed versions
===========================

	Issue introduced in 5.6 with commit caa2da34fd25a37e9fd43343b6966fb9d730a6d5 and fixed in 6.6.148 with commit 148d7ec0a3a98839c320e6cdd112e2e88bfb091b
	Issue introduced in 5.6 with commit caa2da34fd25a37e9fd43343b6966fb9d730a6d5 and fixed in 6.12.101 with commit 5e023fe2569e630ba23b5558ebe4bf4837af4d16
	Issue introduced in 5.6 with commit caa2da34fd25a37e9fd43343b6966fb9d730a6d5 and fixed in 6.18.40 with commit 5df30f05db96552903680a17f858d250dfd9e86e
	Issue introduced in 5.6 with commit caa2da34fd25a37e9fd43343b6966fb9d730a6d5 and fixed in 7.1.5 with commit 23d917acd9c9a9fd999688ec3fdde7aa58ab8a14
	Issue introduced in 5.6 with commit caa2da34fd25a37e9fd43343b6966fb9d730a6d5 and fixed in 7.2-rc3 with commit 62e7df6d042aeebd5efb581074e28865c04477be

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2026-72023
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/148d7ec0a3a98839c320e6cdd112e2e88bfb091b
	https://git.kernel.org/stable/c/5e023fe2569e630ba23b5558ebe4bf4837af4d16
	https://git.kernel.org/stable/c/5df30f05db96552903680a17f858d250dfd9e86e
	https://git.kernel.org/stable/c/23d917acd9c9a9fd999688ec3fdde7aa58ab8a14
	https://git.kernel.org/stable/c/62e7df6d042aeebd5efb581074e28865c04477be