CVE-2021-47001

In the Linux kernel, the following vulnerability has been resolved:
xprtrdma: Fix cwnd update ordering After a reconnect, the reply handler is
opening the cwnd (and thus enabling more RPC Calls to be sent) /before/
rpcrdma_post_recvs() can post enough Receive WRs to receive their replies.
This causes an RNR and the new connection is lost immediately. The race is
most clearly exposed when KASAN and disconnect injection are enabled. This
slows down rpcrdma_rep_create() enough to allow the send side to post a
bunch of RPC Calls before the Receive completion handler can invoke
ib_post_recv().