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Commit 49cdc4c7 authored by Liping Zhang's avatar Liping Zhang Committed by Pablo Neira Ayuso
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netfilter: nft_range: add the missing NULL pointer check 



Otherwise, kernel panic will happen if the user does not specify
the related attributes.

Fixes: 0f3cd9b3 ("netfilter: nf_tables: add range expression")
Signed-off-by: default avatarLiping Zhang <zlpnobody@gmail.com>
Signed-off-by: default avatarPablo Neira Ayuso <pablo@netfilter.org>
parent d3e2a111

net/netfilter/nft_range.c

+6 −0
Original line number Diff line number Diff line
@@ -59,6 +59,12 @@ static int nft_range_init(const struct nft_ctx *ctx, const struct nft_expr *expr 
	int err;

	u32 op;



	if (!tb[NFTA_RANGE_SREG]      ||

	    !tb[NFTA_RANGE_OP]	      ||

	    !tb[NFTA_RANGE_FROM_DATA] ||

	    !tb[NFTA_RANGE_TO_DATA])

		return -EINVAL;



	err = nft_data_init(NULL, &priv->data_from, sizeof(priv->data_from),

			    &desc_from, tb[NFTA_RANGE_FROM_DATA]);

	if (err < 0)