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ipv4: ip_check_defrag should correctly check return value of skb_copy_bits
[firefly-linux-kernel-4.4.55.git]
/
net
/
ipv4
/
ip_fragment.c
diff --git
a/net/ipv4/ip_fragment.c
b/net/ipv4/ip_fragment.c
index b66910aaef4d633977d2e983f2c63b419da38f77..5fff3d466e90d3e37d6b560c1938c2f55a3cb845 100644
(file)
--- a/
net/ipv4/ip_fragment.c
+++ b/
net/ipv4/ip_fragment.c
@@
-683,7
+683,7
@@
struct sk_buff *ip_check_defrag(struct sk_buff *skb, u32 user)
if (skb->protocol != htons(ETH_P_IP))
return skb;
- if (
!skb_copy_bits(skb, 0, &iph, sizeof(iph))
)
+ if (
skb_copy_bits(skb, 0, &iph, sizeof(iph)) < 0
)
return skb;
if (iph.ihl < 5 || iph.version != 4)