summaryrefslogtreecommitdiff
path: root/net
diff options
context:
space:
mode:
authorEric Dumazet <edumazet@google.com>2023-01-06 17:25:23 +0300
committerDavid S. Miller <davem@davemloft.net>2023-01-09 10:37:07 +0300
commit7871f54e3deed68a27111dda162c4fe9b9c65f8f (patch)
treee4f5c38ed70c2c5ead9514590fcfacf8193582df /net
parent9dab880d675b9d0dd56c6428e4e8352a3339371d (diff)
downloadlinux-7871f54e3deed68a27111dda162c4fe9b9c65f8f.tar.xz
gro: take care of DODGY packets
Jaroslav reported a recent throughput regression with virtio_net caused by blamed commit. It is unclear if DODGY GSO packets coming from user space can be accepted by GRO engine in the future with minimal changes, and if there is any expected gain from it. In the meantime, make sure to detect and flush DODGY packets. Fixes: 5eddb24901ee ("gro: add support of (hw)gro packets to gro stack") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-and-bisected-by: Jaroslav Pulchart <jaroslav.pulchart@gooddata.com> Cc: Coco Li <lixiaoyan@google.com> Cc: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/core/gro.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/net/core/gro.c b/net/core/gro.c
index fd8c6a7e8d3e..506f83d715f8 100644
--- a/net/core/gro.c
+++ b/net/core/gro.c
@@ -505,8 +505,9 @@ found_ptype:
NAPI_GRO_CB(skb)->count = 1;
if (unlikely(skb_is_gso(skb))) {
NAPI_GRO_CB(skb)->count = skb_shinfo(skb)->gso_segs;
- /* Only support TCP at the moment. */
- if (!skb_is_gso_tcp(skb))
+ /* Only support TCP and non DODGY users. */
+ if (!skb_is_gso_tcp(skb) ||
+ (skb_shinfo(skb)->gso_type & SKB_GSO_DODGY))
NAPI_GRO_CB(skb)->flush = 1;
}