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| author | Florian Westphal <fw@strlen.de> | 2014-10-20 13:49:17 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-10-20 12:38:13 -0400 |
| commit | 330966e501ffe282d7184fde4518d5e0c24bc7f8 (patch) | |
| tree | 59951ec61922bcdbb674b63f114cfdf52d1203ef /net/openvswitch/datapath.c | |
| parent | 1e16aa3ddf863c6b9f37eddf52503230a62dedb3 (diff) | |
| download | linux-stable-330966e501ffe282d7184fde4518d5e0c24bc7f8.tar.gz linux-stable-330966e501ffe282d7184fde4518d5e0c24bc7f8.tar.bz2 linux-stable-330966e501ffe282d7184fde4518d5e0c24bc7f8.zip | |
net: make skb_gso_segment error handling more robust
skb_gso_segment has three possible return values:
1. a pointer to the first segmented skb
2. an errno value (IS_ERR())
3. NULL. This can happen when GSO is used for header verification.
However, several callers currently test IS_ERR instead of IS_ERR_OR_NULL
and would oops when NULL is returned.
Note that these call sites should never actually see such a NULL return
value; all callers mask out the GSO bits in the feature argument.
However, there have been issues with some protocol handlers erronously not
respecting the specified feature mask in some cases.
It is preferable to get 'have to turn off hw offloading, else slow' reports
rather than 'kernel crashes'.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/openvswitch/datapath.c')
| -rw-r--r-- | net/openvswitch/datapath.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c index 2e31d9e7f4dc..e6d7255183eb 100644 --- a/net/openvswitch/datapath.c +++ b/net/openvswitch/datapath.c @@ -324,6 +324,8 @@ static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb, segs = __skb_gso_segment(skb, NETIF_F_SG, false); if (IS_ERR(segs)) return PTR_ERR(segs); + if (segs == NULL) + return -EINVAL; /* Queue all of the segments. */ skb = segs; |