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Change History

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

net: mana: fix use-after-free in add_adev() error path

If auxiliary_device_add() fails, add_adev() jumps to add_fail and calls
auxiliary_device_uninit(adev).

The auxiliary device has its release callback set to adev_release(),
which frees the containing struct mana_adev. Since adev is embedded in
struct mana_adev, the subsequent fall-through to init_fail and access
to adev->id may result in a use-after-free.

Fix this by saving the allocated auxiliary device id in a local
variable before calling auxiliary_device_add(), and use that saved id
in the cleanup path after auxiliary_device_uninit().

https://git.kernel.org/stable/c/43f5b19fd190fea20d052bc84741b28031d5baa9

https://git.kernel.org/stable/c/5f4061f8225d18695e5afe9bbf1cb7bd673d7872

https://git.kernel.org/stable/c/c4ea7d8907cf72b259bf70bd8c2e791e1c4ff70f

https://git.kernel.org/stable/c/d88541ffd56d62a61e77209080001eddd4d69815

https://git.kernel.org/stable/c/e5a75bf026c686b91a7dc6f9c5caf5016745d1fe