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

misc/libmasm/module: Fix two use after free in ibmasm_init_one

In ibmasm_init_one, it calls ibmasm_init_remote_input_dev().
Inside ibmasm_init_remote_input_dev, mouse_dev and keybd_dev are
allocated by input_allocate_device(), and assigned to
sp->remote.mouse_dev and sp->remote.keybd_dev respectively.

In the err_free_devices error branch of ibmasm_init_one,
mouse_dev and keybd_dev are freed by input_free_device(), and return
error. Then the execution runs into error_send_message error branch
of ibmasm_init_one, where ibmasm_free_remote_input_dev(sp) is called
to unregister the freed sp->remote.mouse_dev and sp->remote.keybd_dev.

My patch add a "error_init_remote" label to handle the error of
ibmasm_init_remote_input_dev(), to avoid the uaf bugs.

kernel.org https://git.kernel.org/stable/c/1512e7dc5eb08b7d92a12e2bfcd9cb8c4a1ec069 [No types assigned]

kernel.org https://git.kernel.org/stable/c/29ba8e2ba89ee2862a26d91204dd5fe77ceee25a [No types assigned]

kernel.org https://git.kernel.org/stable/c/38660031e80eaa6cc9370b031c180612f414b00d [No types assigned]

kernel.org https://git.kernel.org/stable/c/481a76d4749ee3a27f902ba213fdcbb4bb39720e [No types assigned]

kernel.org https://git.kernel.org/stable/c/5b06ca113bf197aab2ab61288f42506e0049fbab [No types assigned]

kernel.org https://git.kernel.org/stable/c/7272b591c4cb9327c43443f67b8fbae7657dd9ae [No types assigned]

kernel.org https://git.kernel.org/stable/c/a7268e8a227d5a4f0bd1584f556246b0224ab274 [No types assigned]

kernel.org https://git.kernel.org/stable/c/b9c87ce3bc6331f82811a8cf8e930423c22523a3 [No types assigned]

kernel.org https://git.kernel.org/stable/c/ef1067d2baa847d53c9988510d99fb494de4d12c [No types assigned]