CVE-2020-36778 Information

Description

In the Linux kernel the following vulnerability has been resolved:

i2c: xiic: fix reference leak when pm_runtime_get_sync fails

The PM reference count is not expected to be incremented on return in xiic_xfer and xiic_i2c_remove.

However pm_runtime_get_sync will increment the PM reference count even failed. Forgetting to putting operation will result in a reference leak here.

Replace it with pm_runtime_resume_and_get to keep usage counter balanced.

Reference

https://git.kernel.org/stable/c/c977426db644ba476938125597947979e8aba725 https://git.kernel.org/stable/c/e2ba996577eaea423694dc69ae43d56f1410a22b https://git.kernel.org/stable/c/a42ac16e6573f19c78f556ea292f5b534fcc4514 https://git.kernel.org/stable/c/a85c5c7a3aa8041777ff691400b4046e56149fd3