Vulnerability in Linux

[ Description ]Official description

In the Linux kernel, the following vulnerability has been resolved: gpio: zynq: fix runtime PM leak on request error path pm_runtime_get_sync() leaves the usage counter incremented even when it fails, and zynq_gpio_request() returns the error without dropping it. gpiolib does not call ->free() when ->request() fails, so zynq_gpio_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/25c08be2a5e7715f19a6e02bbe9b0e5f01c77aac
• git.kernel.org/stable/c/58a417a19d80141fff3abe6004e2e47285506e73
• git.kernel.org/stable/c/60a76cdd92e25f576dc58d756a565760dde1f7a1
• git.kernel.org/stable/c/6e05f1c614a57a5d4c364dd12e20c6fd012f9d3e
• git.kernel.org/stable/c/6e20dabffbcd7b222d8e7bb85a7d8e8325df7699
• git.kernel.org/stable/c/a3e9b7f7c9558f8c9592f8f817557bff98707bb3
• git.kernel.org/stable/c/e380fba02908b809f5bbef371259003cf5887bb4
• git.kernel.org/stable/c/e9438ab5328a177c9c0e5df87eb92a7162841e98