1. 漏洞描述

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

media: qcom: camss: fix error path on configuration of power domains

There is a chance to meet runtime issues during configuration of CAMSS
power domains, because on the error path dev_pm_domain_detach() is
unexpectedly called with NULL or error pointer.

One of the simplest ways to reproduce the problem is to probe CAMSS
driver before registration of CAMSS power domains, for instance if
a platform CAMCC driver is simply not built.

Warning backtrace example:

Unable to handle kernel NULL pointer dereference at virtual address 00000000000001a2

<snip&gt;

pc : dev_pm_domain_detach+0x8/0x48
lr : camss_probe+0x374/0x9c0

<snip&gt;

Call trace:
dev_pm_domain_detach+0x8/0x48
platform_probe+0x70/0xf0
really_probe+0xc4/0x2a8
__driver_probe_device+0x80/0x140
driver_probe_device+0x48/0x170
__device_attach_driver+0xc0/0x148
bus_for_each_drv+0x88/0xf0
__device_attach+0xb0/0x1c0
device_initial_probe+0x1c/0x30
bus_probe_device+0xb4/0xc0
deferred_probe_work_func+0x90/0xd0
process_one_work+0x164/0x3e0
worker_thread+0x310/0x420
kthread+0x120/0x130
ret_from_fork+0x10/0x20

2. 影响范围

3. 影响组件

4. 修复版本

5. 修复方法

6. 下载链接