CVE-2022-50246

Summary

In the Linux kernel, the following vulnerability has been resolved:

usb: typec: tcpci: fix of node refcount leak in tcpci_register_port()

I got the following report while doing device(mt6370-tcpc) load test with CONFIG_OF_UNITTEST and CONFIG_OF_DYNAMIC enabled:

OF: ERROR: memory leak, expected refcount 1 instead of 2, of_node_get()/of_node_put() unbalanced - destroy cset entry: attach overlay node /i2c/pmic@34/tcpc/connector

The 'fwnode' set in tcpci_parse_config() which is called in tcpci_register_port(), its node refcount is increased in device_get_named_child_node(). It needs be put while exiting, so call fwnode_handle_put() in the error path of tcpci_register_port() and in tcpci_unregister_port() to avoid leak.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux5e85a04c8c0d271d7561a770b85741f186398868 < 4f257e2eba419ab4cd880c822346450e4e7b2af3affected
LinuxLinux5e85a04c8c0d271d7561a770b85741f186398868 < d3b6c28a71f111a6c67ddc3238aab95910fd86cfaffected
LinuxLinux5e85a04c8c0d271d7561a770b85741f186398868 < ba75be6f0d9d028d20852564206565a4c03e3288affected
LinuxLinux5e85a04c8c0d271d7561a770b85741f186398868 < e75a324409715bd71348f79a49aa61b69dbeb676affected
LinuxLinux5e85a04c8c0d271d7561a770b85741f186398868 < 5f125507d2270035dfcf83fbff6cff5a143e200caffected
LinuxLinux5e85a04c8c0d271d7561a770b85741f186398868 < 0384e87e3fec735e47f1c133c796f32ef7a72a9baffected
LinuxLinux4.19affected
LinuxLinux0 < 4.19unaffected
LinuxLinux5.4.229 <= 5.4.*unaffected
LinuxLinux5.10.163 <= 5.10.*unaffected
LinuxLinux5.15.86 <= 5.15.*unaffected
LinuxLinux6.0.16 <= 6.0.*unaffected
LinuxLinux6.1.2 <= 6.1.*unaffected
LinuxLinux6.2 <= *unaffected

Weaknesses

References