linux-cve-announce - CVE-2022-50532: scsi: mpt3sas: Fix possible resource leaks in mpt3sas_transport_port

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Message-ID: <2025100708-CVE-2022-50532-430b@gregkh>
Date: Tue,  7 Oct 2025 17:19:19 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2022-50532: scsi: mpt3sas: Fix possible resource leaks in mpt3sas_transport_port_add()

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

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

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

scsi: mpt3sas: Fix possible resource leaks in mpt3sas_transport_port_add()

In mpt3sas_transport_port_add(), if sas_rphy_add() returns error,
sas_rphy_free() needs be called to free the resource allocated in
sas_end_device_alloc(). Otherwise a kernel crash will happen:

Unable to handle kernel NULL pointer dereference at virtual address 0000000000000108
CPU: 45 PID: 37020 Comm: bash Kdump: loaded Tainted: G        W          6.1.0-rc1+ #189
pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : device_del+0x54/0x3d0
lr : device_del+0x37c/0x3d0
Call trace:
 device_del+0x54/0x3d0
 attribute_container_class_device_del+0x28/0x38
 transport_remove_classdev+0x6c/0x80
 attribute_container_device_trigger+0x108/0x110
 transport_remove_device+0x28/0x38
 sas_rphy_remove+0x50/0x78 [scsi_transport_sas]
 sas_port_delete+0x30/0x148 [scsi_transport_sas]
 do_sas_phy_delete+0x78/0x80 [scsi_transport_sas]
 device_for_each_child+0x68/0xb0
 sas_remove_children+0x30/0x50 [scsi_transport_sas]
 sas_rphy_remove+0x38/0x78 [scsi_transport_sas]
 sas_port_delete+0x30/0x148 [scsi_transport_sas]
 do_sas_phy_delete+0x78/0x80 [scsi_transport_sas]
 device_for_each_child+0x68/0xb0
 sas_remove_children+0x30/0x50 [scsi_transport_sas]
 sas_remove_host+0x20/0x38 [scsi_transport_sas]
 scsih_remove+0xd8/0x420 [mpt3sas]

Because transport_add_device() is not called when sas_rphy_add() fails, the
device is not added. When sas_rphy_remove() is subsequently called to
remove the device in the remove() path, a NULL pointer dereference happens.

The Linux kernel CVE team has assigned CVE-2022-50532 to this issue.


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

	Issue introduced in 3.8 with commit f92363d12359498f9a9960511de1a550f0ec41c2 and fixed in 5.4.229 with commit d60000cb1195a464080b0efb4949daf7594e0020
	Issue introduced in 3.8 with commit f92363d12359498f9a9960511de1a550f0ec41c2 and fixed in 5.10.163 with commit ce1a69cc85006b494353911b35171da195d79e25
	Issue introduced in 3.8 with commit f92363d12359498f9a9960511de1a550f0ec41c2 and fixed in 5.15.86 with commit 6a92129c8f999ff5b122c100ce7f625eb3e98c4b
	Issue introduced in 3.8 with commit f92363d12359498f9a9960511de1a550f0ec41c2 and fixed in 6.0.16 with commit 6f6768e2fc8638fabdd8802c2ef693d7aef01db1
	Issue introduced in 3.8 with commit f92363d12359498f9a9960511de1a550f0ec41c2 and fixed in 6.1.2 with commit d17bca3ddfe507874cb826d32721552da12e741f
	Issue introduced in 3.8 with commit f92363d12359498f9a9960511de1a550f0ec41c2 and fixed in 6.2 with commit 78316e9dfc24906dd474630928ed1d3c562b568e

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-2022-50532
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/scsi/mpt3sas/mpt3sas_transport.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/d60000cb1195a464080b0efb4949daf7594e0020
	https://git.kernel.org/stable/c/ce1a69cc85006b494353911b35171da195d79e25
	https://git.kernel.org/stable/c/6a92129c8f999ff5b122c100ce7f625eb3e98c4b
	https://git.kernel.org/stable/c/6f6768e2fc8638fabdd8802c2ef693d7aef01db1
	https://git.kernel.org/stable/c/d17bca3ddfe507874cb826d32721552da12e741f
	https://git.kernel.org/stable/c/78316e9dfc24906dd474630928ed1d3c562b568e