CVE-2021-47514 Information

Description

In the Linux kernel the following vulnerability has been resolved:

devlink: fix netns refcount leak in devlink_nl_cmd_reload()

While preparing my patch series adding netns refcount tracking I spotted bugs in devlink_nl_cmd_reload()

Some error paths forgot to release a refcount on a netns.

To fix this we can reduce the scope of get_net()/put_net() section around the call to devlink_reload().

Reference

https://git.kernel.org/stable/c/4b7e90672af8e0c78205db006f1b0a20ebd07f5f https://git.kernel.org/stable/c/fe30b70ca84da9c4aca85c03ad86e7a9b89c5ded https://git.kernel.org/stable/c/4dbb0dad8e63fcd0b5a117c2861d2abe7ff5f186