CVE-2020-36779 Information

Description

In the Linux kernel the following vulnerability has been resolved:

i2c: stm32f7: fix reference leak when pm_runtime_get_sync fails

The PM reference count is not expected to be incremented on return in these stm32f7_i2c_xx serious functions.

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/c323b270a52a26aa8038a4d1fd9a850904a41166 https://git.kernel.org/stable/c/d791b90f5c5e5aa8ccf9e33386c16bd2b7e333a4 https://git.kernel.org/stable/c/c7ea772c9fcf711ed566814b92eecaffc0e2bfd0 https://git.kernel.org/stable/c/2c662660ce2bd3b09dae21a9a9ac9395e1e6c00b