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| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2022-01-05 16:09:57 +0100 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2022-01-06 10:43:23 +0100 |
| commit | 4e1860a3863707e8177329c006d10f9e37e097a8 (patch) | |
| tree | c79eb1919de9ee6c97544aae1e9e6224f845ed0f /net | |
| parent | selftests: netfilter: switch to socat for tests using -q option (diff) | |
| download | linux-4e1860a3863707e8177329c006d10f9e37e097a8.tar.xz linux-4e1860a3863707e8177329c006d10f9e37e097a8.zip | |
netfilter: nft_payload: do not update layer 4 checksum when mangling fragments
IP fragments do not come with the transport header, hence skip bogus
layer 4 checksum updates.
Fixes: 1814096980bb ("netfilter: nft_payload: layer 4 checksum adjustment for pseudoheader fields")
Reported-and-tested-by: Steffen Weinreich <steve@weinreich.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/netfilter/nft_payload.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/netfilter/nft_payload.c b/net/netfilter/nft_payload.c index bd689938a2e0..58e96a0fe0b4 100644 --- a/net/netfilter/nft_payload.c +++ b/net/netfilter/nft_payload.c @@ -546,6 +546,9 @@ static int nft_payload_l4csum_offset(const struct nft_pktinfo *pkt, struct sk_buff *skb, unsigned int *l4csum_offset) { + if (pkt->fragoff) + return -1; + switch (pkt->tprot) { case IPPROTO_TCP: *l4csum_offset = offsetof(struct tcphdr, check); |