]> git.proxmox.com Git - mirror_ubuntu-disco-kernel.git/commit
gro: Enter slow-path if there is no tailroom
authorHerbert Xu <herbert@gondor.apana.org.au>
Tue, 10 Jan 2017 20:24:01 +0000 (12:24 -0800)
committerDavid S. Miller <davem@davemloft.net>
Wed, 11 Jan 2017 02:26:12 +0000 (21:26 -0500)
commit1272ce87fa017ca4cf32920764d879656b7a005a
tree77213de2de22ae61ead334aaaaab20fc37c2b93c
parent9f9b74ef896792399dc7b5121896b9c963db80fb
gro: Enter slow-path if there is no tailroom

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>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/core/dev.c