Public bug reported:
SRU Justification:
[Impact]
After syncing up the gpio-mlxbf3.c driver with the upstreamed version, we
dropped the use of the valid_mask variable because kernels greater or equal to
6.2.0 dont need it.
This is no longer needed in kernel versions >= 6.2.0 because valid_mask is
populated by core gpio code.
5.15 kernel doesnt support that feature so we still need to explicitly define
valid_mask like we did before.
This doesnt impact the functionality of the GPIO driver but it is a security
breach as it doesnt restrict the access to only gpios defined in the acpi table
by valid_mask.
[Fix]
* define valid_mask and init_valid_mask
[Test Case]
* Make sure that the user (libgpiod) cannot access any other gpio
besides 0->4 (gpiochip0) and 22-23 in gpiochip1.
[Regression Potential]
no known regression.
** Affects: linux-bluefield (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2038868
Title:
gpio-mlxbf3: support valid mask
Status in linux-bluefield package in Ubuntu:
New
Bug description:
SRU Justification:
[Impact]
After syncing up the gpio-mlxbf3.c driver with the upstreamed version, we
dropped the use of the valid_mask variable because kernels greater or equal to
6.2.0 dont need it.
This is no longer needed in kernel versions >= 6.2.0 because valid_mask is
populated by core gpio code.
5.15 kernel doesnt support that feature so we still need to explicitly define
valid_mask like we did before.
This doesnt impact the functionality of the GPIO driver but it is a security
breach as it doesnt restrict the access to only gpios defined in the acpi table
by valid_mask.
[Fix]
* define valid_mask and init_valid_mask
[Test Case]
* Make sure that the user (libgpiod) cannot access any other gpio
besides 0->4 (gpiochip0) and 22-23 in gpiochip1.
[Regression Potential]
no known regression.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-bluefield/+bug/2038868/+subscriptions
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