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-rw-r--r--net/sched/cls_u32.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/net/sched/cls_u32.c b/net/sched/cls_u32.c
index 4f522143811e..7416a5c73b2a 100644
--- a/net/sched/cls_u32.c
+++ b/net/sched/cls_u32.c
@@ -134,10 +134,12 @@ next_knode:
#endif
for (i = n->sel.nkeys; i>0; i--, key++) {
- unsigned int toff;
+ int toff = off + key->off + (off2 & key->offmask);
__be32 *data, _data;
- toff = off + key->off + (off2 & key->offmask);
+ if (skb_headroom(skb) + toff < 0)
+ goto out;
+
data = skb_header_pointer(skb, toff, 4, &_data);
if (!data)
goto out;