CVE-2026-72494: RDMA/irdma: Replace waitqueue and flag with completion

CVE-2026-72494: RDMA/irdma: Replace waitqueue and flag with completion

[Greg Kroah-Hartman]

From: Greg Kroah-Hartman <gregkh@kernel.org>

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

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

RDMA/irdma: Replace waitqueue and flag with completion

The driver previously used a waitqueue along with an explicit
request_done flag, but without proper barriers around request_done.

An earlier patch by Gui-Dong Han <hanguidong02@gmail.com> attempted
to fix this by adding the missing memory barriers. Rather than
adding the barriers, this patch replaces the waitqueue+flag with
a completion, which is designed for this exact purpose.

The Linux kernel CVE team has assigned CVE-2026-72494 to this issue.


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

	Issue introduced in 5.14 with commit 44d9e52977a1b90b0db1c7f8b197c218e9226520 and fixed in 7.1.5 with commit bde37aed0724c0139dea177f3aae8d989b6babb1
	Issue introduced in 5.14 with commit 44d9e52977a1b90b0db1c7f8b197c218e9226520 and fixed in 7.2-rc1 with commit d9c8c45e6d2f438a3c8e643ae78b59454fa0fadd

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-2026-72494
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/infiniband/hw/irdma/hw.c
	drivers/infiniband/hw/irdma/main.h
	drivers/infiniband/hw/irdma/utils.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/bde37aed0724c0139dea177f3aae8d989b6babb1
	https://git.kernel.org/stable/c/d9c8c45e6d2f438a3c8e643ae78b59454fa0fadd