netdev - Re: [PATCH net] net/tls: don't leak IV and record seq when offload fails

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Date:   Sat, 20 Apr 2019 20:39:00 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     jakub.kicinski@...ronome.com
Cc:     netdev@...r.kernel.org, oss-drivers@...ronome.com,
        alexei.starovoitov@...il.com, davejwatson@...com,
        borisp@...lanox.com, aviadye@...lanox.com,
        dirk.vandermerwe@...ronome.com
Subject: Re: [PATCH net] net/tls: don't leak IV and record seq when offload
 fails

From: Jakub Kicinski <jakub.kicinski@...ronome.com>
Date: Fri, 19 Apr 2019 16:52:19 -0700

> When device refuses the offload in tls_set_device_offload_rx()
> it calls tls_sw_free_resources_rx() to clean up software context
> state.
> 
> Unfortunately, tls_sw_free_resources_rx() does not free all
> the state tls_set_sw_offload() allocated - it leaks IV and
> sequence number buffers.  All other code paths which lead to
> tls_sw_release_resources_rx() (which tls_sw_free_resources_rx()
> calls) free those right before the call.
> 
> Avoid the leak by moving freeing of iv and rec_seq into
> tls_sw_release_resources_rx().
> 
> Fixes: 4799ac81e52a ("tls: Add rx inline crypto offload")
> Signed-off-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
> Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@...ronome.com>

Also applied and queued up for -stable, thanks.