diff options
| -rw-r--r-- | net/netfilter/nft_exthdr.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/net/netfilter/nft_exthdr.c b/net/netfilter/nft_exthdr.c index c308920b194c..d212a85d2f33 100644 --- a/net/netfilter/nft_exthdr.c +++ b/net/netfilter/nft_exthdr.c @@ -98,14 +98,21 @@ static void nft_exthdr_tcp_eval(const struct nft_expr *expr, goto err; offset = i + priv->offset; - dest[priv->len / NFT_REG32_SIZE] = 0; - memcpy(dest, opt + offset, priv->len); + if (priv->flags & NFT_EXTHDR_F_PRESENT) { + *dest = 1; + } else { + dest[priv->len / NFT_REG32_SIZE] = 0; + memcpy(dest, opt + offset, priv->len); + } return; } err: - regs->verdict.code = NFT_BREAK; + if (priv->flags & NFT_EXTHDR_F_PRESENT) + *dest = 0; + else + regs->verdict.code = NFT_BREAK; } static const struct nla_policy nft_exthdr_policy[NFTA_EXTHDR_MAX + 1] = { |