diff options
| author | Sabrina Dubroca <sd@queasysnail.net> | 2018-06-30 17:38:55 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-07-02 20:34:04 +0900 |
| commit | 603d4cf8fe095b1ee78f423d514427be507fb513 (patch) | |
| tree | a4051b67f31ba061752f8c5326fa9c6aab528e7f /drivers/net/vxlan.c | |
| parent | 1236f22fbae15df3736ab4a984c64c0c6ee6254c (diff) | |
| download | lwn-603d4cf8fe095b1ee78f423d514427be507fb513.tar.gz lwn-603d4cf8fe095b1ee78f423d514427be507fb513.zip | |
net: fix use-after-free in GRO with ESP
Since the addition of GRO for ESP, gro_receive can consume the skb and
return -EINPROGRESS. In that case, the lower layer GRO handler cannot
touch the skb anymore.
Commit 5f114163f2f5 ("net: Add a skb_gro_flush_final helper.") converted
some of the gro_receive handlers that can lead to ESP's gro_receive so
that they wouldn't access the skb when -EINPROGRESS is returned, but
missed other spots, mainly in tunneling protocols.
This patch finishes the conversion to using skb_gro_flush_final(), and
adds a new helper, skb_gro_flush_final_remcsum(), used in VXLAN and
GUE.
Fixes: 5f114163f2f5 ("net: Add a skb_gro_flush_final helper.")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Reviewed-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/vxlan.c')
| -rw-r--r-- | drivers/net/vxlan.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c index aee0e60471f1..f6bb1d54d4bd 100644 --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -623,9 +623,7 @@ static struct sk_buff **vxlan_gro_receive(struct sock *sk, flush = 0; out: - skb_gro_remcsum_cleanup(skb, &grc); - skb->remcsum_offload = 0; - NAPI_GRO_CB(skb)->flush |= flush; + skb_gro_flush_final_remcsum(skb, pp, flush, &grc); return pp; } |