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Commit 88791b79 authored by Pablo Neira Ayuso's avatar Pablo Neira Ayuso Committed by Greg Kroah-Hartman
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netfilter: nf_tables: initialize registers in nft_do_chain() 



commit 4c905f6740a365464e91467aa50916555b28213d upstream.

Initialize registers to avoid stack leak into userspace.

Fixes: 96518518 ("netfilter: add nftables")
Signed-off-by: default avatarPablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ea0bc620

net/netfilter/nf_tables_core.c

+1 −1
Original line number Diff line number Diff line
@@ -144,7 +144,7 @@ nft_do_chain(struct nft_pktinfo *pkt, void *priv) 
	struct nft_rule *const *rules;

	const struct nft_rule *rule;

	const struct nft_expr *expr, *last;

	struct nft_regs regs;

	struct nft_regs regs = {};

	unsigned int stackptr = 0;

	struct nft_jumpstack jumpstack[NFT_JUMP_STACK_SIZE];

	bool genbit = READ_ONCE(net->nft.gencursor);