From: Ka-Cheong Poon <>
Date: Wed, 11 Apr 2018 00:57:25 -0700

> rds_sendmsg() calls rds_send_mprds_hash() to find a c_path to use to
> send a message.  Suppose the RDS connection is not yet up.  In
> rds_send_mprds_hash(), it does
>       if (conn->c_npaths == 0)
>               wait_event_interruptible(conn->c_hs_waitq,
>                                        (conn->c_npaths != 0));
> If it is interrupted before the connection is set up,
> rds_send_mprds_hash() will return a non-zero hash value.  Hence
> rds_sendmsg() will use a non-zero c_path to send the message.  But if
> the RDS connection ends up to be non-MP capable, the message will be
> lost as only the zero c_path can be used.
> Signed-off-by: Ka-Cheong Poon <>

Applied and queued up for -stable, thanks.

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