Subject: Re: [PATCH net] RDS-TCP: Recover correctly from pskb_pull()/pksb_trim() failure in rds_tcp_data_recv

From: santosh shilimkar <[email-masked]>
Date: Mon, 26 Oct 2015 09:56:01 -0700

On 10/26/2015 9:46 AM, Sowmini Varadhan wrote:
>
> 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 <[email-masked]>
> ---
Good one. Probably we should get this fix in stable versions as
well. It seems to be applicable for all v2.6.32+ stable versions.

FWIW,
Acked-by: Santosh Shilimkar <[email-masked]>

Regards,
Santosh