Vulnerability in Linux

[ Description ]Official description

In the Linux kernel, the following vulnerability has been resolved: gpio: xilinx: fix runtime PM leak on request error path pm_runtime_get_sync() leaves the usage counter incremented even when it fails, and xgpio_request() returns the error without dropping it. gpiolib does not call ->free() when ->request() fails, so xgpio_free(), which holds the only matching pm_runtime_put(), never runs. The reference is leaked and the controller can no longer runtime-suspend, so its clock stays enabled. Switch to pm_runtime_resume_and_get(), which only increments the usage counter on success.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• git.kernel.org/stable/c/2fd6ecda5d1f47cffcfadddb35ee49402162c724
• git.kernel.org/stable/c/a027e0d7765d1531ee39e4dae81951b04f32ba7b
• git.kernel.org/stable/c/b07b3925f676640103b3d74b93fc401b1c873d13
• git.kernel.org/stable/c/f73ee2bd2293f8cc340061c5229395ace71fc2eb
• git.kernel.org/stable/c/ff82fc3a4a1d417dee1229681cc5285986edb1fa