linux-kernel - Re: [PATCH net] RDS-TCP: Recover correctly from pskb_pull()/pksb_trim() failure in rds_tcp_data

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Message-Id: <20151027.194704.863557122432415853.davem@davemloft.net>
Date:	Tue, 27 Oct 2015 19:47:04 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	sowmini.varadhan@...cle.com
Cc:	rds-devel@....oracle.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, santosh.shilimkar@...cle.com
Subject: Re: [PATCH net] RDS-TCP: Recover correctly from
 pskb_pull()/pksb_trim() failure in rds_tcp_data_recv

From: Sowmini Varadhan <sowmini.varadhan@...cle.com>
Date: Mon, 26 Oct 2015 12:46:37 -0400

> Either of pskb_pull() or pskb_trim() may fail under low memory conditions.
> If rds_tcp_data_recv() ignores such failures, the application will
> receive corrupted data because the skb has not been correctly
> carved to the RDS datagram size.
> 
> Avoid this by handling pskb_pull/pskb_trim failure in the same
> manner as the skb_clone failure: bail out of rds_tcp_data_recv(), and
> retry via the deferred call to rds_send_worker() that gets set up on
> ENOMEM from rds_tcp_read_sock()
> 
> Signed-off-by: Sowmini Varadhan <sowmini.varadhan@...cle.com>

Applied and queued up for -stable, thanks.
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