[PATCH] afs: fix UAF caused by afs_put_call

[David Howells]

Guo Xuenan <guoxuenan at huawei.com> wrote:

> -	call->rxcall = NULL;
>  	afs_put_call(call);

That won't work.  It means that the call will drop too many references.

I've already pushed a fix to the net tree, though it hasn't made it upstream
yet:

	https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=0041cd5a50442db6e456b145892a0eaf2dff061f

Thanks,
David