linux-cve-announce - CVE-2022-49931: IB/hfi1: Correctly move list in sc

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Message-ID: <2025050112-CVE-2022-49931-9e35@gregkh>
Date: Thu,  1 May 2025 16:12:01 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2022-49931: IB/hfi1: Correctly move list in sc_disable()

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

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

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

IB/hfi1: Correctly move list in sc_disable()

Commit 13bac861952a ("IB/hfi1: Fix abba locking issue with sc_disable()")
incorrectly tries to move a list from one list head to another.  The
result is a kernel crash.

The crash is triggered when a link goes down and there are waiters for a
send to complete.  The following signature is seen:

  BUG: kernel NULL pointer dereference, address: 0000000000000030
  [...]
  Call Trace:
   sc_disable+0x1ba/0x240 [hfi1]
   pio_freeze+0x3d/0x60 [hfi1]
   handle_freeze+0x27/0x1b0 [hfi1]
   process_one_work+0x1b0/0x380
   ? process_one_work+0x380/0x380
   worker_thread+0x30/0x360
   ? process_one_work+0x380/0x380
   kthread+0xd7/0x100
   ? kthread_complete_and_exit+0x20/0x20
   ret_from_fork+0x1f/0x30

The fix is to use the correct call to move the list.

The Linux kernel CVE team has assigned CVE-2022-49931 to this issue.


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

	Issue introduced in 5.4.157 with commit d997d4e4365f7e59cf6b59c70f966c56d704b64f and fixed in 5.4.224 with commit 25760a41e3802f54aadcc31385543665ab349b8e
	Issue introduced in 5.10.77 with commit d98883f6c33e0d960afedcecaa92fc2b61fec383 and fixed in 5.10.154 with commit 7c4260f8f188df32414a5ecad63e8b934c2aa3f0
	Issue introduced in 5.15 with commit 13bac861952a78664907a0f927d3e874e9a59034 and fixed in 5.15.78 with commit ba95409d6b580501ff6d78efd00064f7df669926
	Issue introduced in 5.15 with commit 13bac861952a78664907a0f927d3e874e9a59034 and fixed in 6.0.8 with commit b8bcff99b07cc175a6ee12a52db51cdd2229586c
	Issue introduced in 5.15 with commit 13bac861952a78664907a0f927d3e874e9a59034 and fixed in 6.1 with commit 1afac08b39d85437187bb2a92d89a741b1078f55
	Issue introduced in 5.14.16 with commit 5d33bd6b4d4d035e42733592899918a18f2540da

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-2022-49931
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/hfi1/pio.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/25760a41e3802f54aadcc31385543665ab349b8e
	https://git.kernel.org/stable/c/7c4260f8f188df32414a5ecad63e8b934c2aa3f0
	https://git.kernel.org/stable/c/ba95409d6b580501ff6d78efd00064f7df669926
	https://git.kernel.org/stable/c/b8bcff99b07cc175a6ee12a52db51cdd2229586c
	https://git.kernel.org/stable/c/1afac08b39d85437187bb2a92d89a741b1078f55