From: David Miller <davem@davemloft.net>
To: eric.dumazet@gmail.com
Cc: netdev@vger.kernel.org, herbert@gondor.apana.org.au,
slavash@mellanox.com, willemb@google.com, edumazet@google.com
Subject: Re: [PATCH net] gro: Enter slow-path if there is no tailroom
Date: Tue, 10 Jan 2017 21:29:11 -0500 (EST) [thread overview]
Message-ID: <20170110.212911.71346127320993214.davem@davemloft.net> (raw)
In-Reply-To: <1484079841.21472.35.camel@edumazet-glaptop3.roam.corp.google.com>
From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Tue, 10 Jan 2017 12:24:01 -0800
> From: Herbert Xu <herbert@gondor.apana.org.au>
>
> The GRO path has a fast-path where we avoid calling pskb_may_pull
> and pskb_expand by directly accessing frag0. However, this should
> only be done if we have enough tailroom in the skb as otherwise
> we'll have to expand it later anyway.
>
> This patch adds the check by capping frag0_len with the skb tailroom.
>
> Fixes: cb18978cbf45 ("gro: Open-code final pskb_may_pull")
> Reported-by: Slava Shwartsman <slavash@mellanox.com>
> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
> Signed-off-by: Eric Dumazet <edumazet@google.com>
Applied and queued up for -stable.
next prev parent reply other threads:[~2017-01-11 2:29 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-10 20:24 [PATCH net] gro: Enter slow-path if there is no tailroom Eric Dumazet
2017-01-11 2:29 ` David Miller [this message]
2017-01-11 3:52 ` [PATCH net] gro: use min_t() in skb_gro_reset_offset() Eric Dumazet
2017-01-11 13:16 ` David Miller
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