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From: "Zhang, Qi Z" <qi.z.zhang@intel.com>
To: Tudor Cornea <tudor.cornea@gmail.com>,
	"Wu, Jingjing" <jingjing.wu@intel.com>,
	"Xing, Beilei" <beilei.xing@intel.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH] net/iavf: fix overflow in maximum packet length config
Date: Mon, 30 Aug 2021 01:04:37 +0000	[thread overview]
Message-ID: <8f48fc483a784502b124b69d6a1dd916@intel.com> (raw)
In-Reply-To: <1628163323-87134-1-git-send-email-tudor.cornea@gmail.com>



> -----Original Message-----
> From: Tudor Cornea <tudor.cornea@gmail.com>
> Sent: Thursday, August 5, 2021 7:35 PM
> To: Wu, Jingjing <jingjing.wu@intel.com>; Xing, Beilei <beilei.xing@intel.com>
> Cc: Zhang, Qi Z <qi.z.zhang@intel.com>; dev@dpdk.org; Tudor Cornea
> <tudor.cornea@gmail.com>
> Subject: [PATCH] net/iavf: fix overflow in maximum packet length config
> 
> The len variable, used in the computation of max_pkt_len could overflow, if
> used to store the result of the following computation:
> 
> rxq->rx_buf_len * IAVF_MAX_CHAINED_RX_BUFFERS
> 
> Since, we could define the mbuf size to have a large value (i.e 13312), and
> IAVF_MAX_CHAINED_RX_BUFFERS is defined as 5, the computation mentioned
> above could potentially result in a value which might be bigger than
> MAX_USHORT.
> 
> The result will be that Jumbo Frames will not work properly
> 
> A similar fix was submitted for the ice driver

Fixes: 69dd4c3d0898 ("net/avf: enable queue and device")
Cc: stable@dpdk.org

> 
> Signed-off-by: Tudor Cornea <tudor.cornea@gmail.com>

Acked-by: Qi Zhang <qi.z.zhang@intel.com>

Applied to dpdk-next-net-intel.

Thanks
Qi


      reply	other threads:[~2021-08-30  1:04 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-05 11:35 [dpdk-dev] [PATCH] net/iavf: fix overflow in maximum packet length config Tudor Cornea
2021-08-30  1:04 ` Zhang, Qi Z [this message]

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