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netfilter: bitwise: only offload boolean operations.

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Only boolean operations supports offloading, so check the type of the
operation and return an error for other types.

Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Jeremy Sowden 2020-01-15 20:05:55 +00:00 committed by Pablo Neira Ayuso
parent 4d57ca2be1
commit ed991d4363
1 changed files with 3 additions and 0 deletions
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3
net/netfilter/nft_bitwise.c
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@ -189,6 +189,9 @@ static int nft_bitwise_offload(struct nft_offload_ctx *ctx,
const struct nft_bitwise *priv = nft_expr_priv(expr);
struct nft_offload_reg *reg = &ctx->regs[priv->dreg];
if (priv->op != NFT_BITWISE_BOOL)
return -EOPNOTSUPP;
if (memcmp(&priv->xor, &zero, sizeof(priv->xor)) ||
priv->sreg != priv->dreg || priv->len != reg->len)
return -EOPNOTSUPP;