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| author | Alexander Drozdov <al.drozdov@gmail.com> | 2015-02-17 13:33:46 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-03-18 13:22:26 +0100 |
| commit | e3569bbff393a7a89a42d72ac240a09b8f21ee4f (patch) | |
| tree | b635386c6a9eee0362d9419ce834792c354291ae /net | |
| parent | 54c7f8978bfe00fdc80e44a0451a1f8f8b8de638 (diff) | |
| download | lwn-e3569bbff393a7a89a42d72ac240a09b8f21ee4f.tar.gz lwn-e3569bbff393a7a89a42d72ac240a09b8f21ee4f.zip | |
ipv4: ip_check_defrag should correctly check return value of skb_copy_bits
[ Upstream commit fba04a9e0c869498889b6445fd06cbe7da9bb834 ]
skb_copy_bits() returns zero on success and negative value on error,
so it is needed to invert the condition in ip_check_defrag().
Fixes: 1bf3751ec90c ("ipv4: ip_check_defrag must not modify skb before unsharing")
Signed-off-by: Alexander Drozdov <al.drozdov@gmail.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/ip_fragment.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c index b66910aaef4d..5fff3d466e90 100644 --- 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) |