linux-cve-announce - CVE-2024-56620: scsi: ufs: qcom: Only free platform MSIs when ESI is enabled

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Message-ID: <2024122709-CVE-2024-56620-d1a8@gregkh>
Date: Fri, 27 Dec 2024 15:51:27 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-56620: scsi: ufs: qcom: Only free platform MSIs when ESI is enabled

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

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

scsi: ufs: qcom: Only free platform MSIs when ESI is enabled

Otherwise, it will result in a NULL pointer dereference as below:

Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008
Call trace:
 mutex_lock+0xc/0x54
 platform_device_msi_free_irqs_all+0x14/0x20
 ufs_qcom_remove+0x34/0x48 [ufs_qcom]
 platform_remove+0x28/0x44
 device_remove+0x4c/0x80
 device_release_driver_internal+0xd8/0x178
 driver_detach+0x50/0x9c
 bus_remove_driver+0x6c/0xbc
 driver_unregister+0x30/0x60
 platform_driver_unregister+0x14/0x20
 ufs_qcom_pltform_exit+0x18/0xb94 [ufs_qcom]
 __arm64_sys_delete_module+0x180/0x260
 invoke_syscall+0x44/0x100
 el0_svc_common.constprop.0+0xc0/0xe0
 do_el0_svc+0x1c/0x28
 el0_svc+0x34/0xdc
 el0t_64_sync_handler+0xc0/0xc4
 el0t_64_sync+0x190/0x194

The Linux kernel CVE team has assigned CVE-2024-56620 to this issue.


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

	Issue introduced in 6.3 with commit 519b6274a7775f5fe00a086f189efb8f063467d1 and fixed in 6.12.5 with commit f99cb5f6344ef93777fd3add7979ebf291a852df
	Issue introduced in 6.3 with commit 519b6274a7775f5fe00a086f189efb8f063467d1 and fixed in 6.13-rc2 with commit 64506b3d23a337e98a74b18dcb10c8619365f2bd

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-2024-56620
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/ufs/host/ufs-qcom.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/f99cb5f6344ef93777fd3add7979ebf291a852df
	https://git.kernel.org/stable/c/64506b3d23a337e98a74b18dcb10c8619365f2bd