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Message-ID: <2025061813-CVE-2022-50127-df59@gregkh>
Date: Wed, 18 Jun 2025 13:03:12 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2022-50127: RDMA/rxe: Fix error unwind in rxe_create_qp()

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

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

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

RDMA/rxe: Fix error unwind in rxe_create_qp()

In the function rxe_create_qp(), rxe_qp_from_init() is called to
initialize qp, internally things like the spin locks are not setup until
rxe_qp_init_req().

If an error occures before this point then the unwind will call
rxe_cleanup() and eventually to rxe_qp_do_cleanup()/rxe_cleanup_task()
which will oops when trying to access the uninitialized spinlock.

Move the spinlock initializations earlier before any failures.

The Linux kernel CVE team has assigned CVE-2022-50127 to this issue.


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

	Issue introduced in 4.8 with commit 8700e3e7c4857d28ebaa824509934556da0b3e76 and fixed in 4.14.291 with commit 3c838ca6fbdb173102780d7bdf18f2f7d9e30979
	Issue introduced in 4.8 with commit 8700e3e7c4857d28ebaa824509934556da0b3e76 and fixed in 4.19.256 with commit 1a63f24e724f677db1ab21251f4d0011ae0bb5b5
	Issue introduced in 4.8 with commit 8700e3e7c4857d28ebaa824509934556da0b3e76 and fixed in 5.4.211 with commit b348e204a53103f51070513a7494da7c62ecbdaa
	Issue introduced in 4.8 with commit 8700e3e7c4857d28ebaa824509934556da0b3e76 and fixed in 5.10.137 with commit 3ef491b26c720a87fcfbd78b7dc8eb83d9753fe6
	Issue introduced in 4.8 with commit 8700e3e7c4857d28ebaa824509934556da0b3e76 and fixed in 5.15.61 with commit 2ceeb04252e621c0b128ecc8fedbca922d11adba
	Issue introduced in 4.8 with commit 8700e3e7c4857d28ebaa824509934556da0b3e76 and fixed in 5.18.18 with commit db924bd8484c76558a4ac4c4b5aeb52e857f0341
	Issue introduced in 4.8 with commit 8700e3e7c4857d28ebaa824509934556da0b3e76 and fixed in 5.19.2 with commit f05b7cf02123aaf99db78abfe638efefdbe15555
	Issue introduced in 4.8 with commit 8700e3e7c4857d28ebaa824509934556da0b3e76 and fixed in 6.0 with commit fd5382c5805c4bcb50fd25b7246247d3f7114733

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-2022-50127
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/sw/rxe/rxe_qp.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/3c838ca6fbdb173102780d7bdf18f2f7d9e30979
	https://git.kernel.org/stable/c/1a63f24e724f677db1ab21251f4d0011ae0bb5b5
	https://git.kernel.org/stable/c/b348e204a53103f51070513a7494da7c62ecbdaa
	https://git.kernel.org/stable/c/3ef491b26c720a87fcfbd78b7dc8eb83d9753fe6
	https://git.kernel.org/stable/c/2ceeb04252e621c0b128ecc8fedbca922d11adba
	https://git.kernel.org/stable/c/db924bd8484c76558a4ac4c4b5aeb52e857f0341
	https://git.kernel.org/stable/c/f05b7cf02123aaf99db78abfe638efefdbe15555
	https://git.kernel.org/stable/c/fd5382c5805c4bcb50fd25b7246247d3f7114733

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