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Date: Fri, 25 Mar 2022 16:14:35 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Pablo Neira Ayuso <pablo@...filter.org> Subject: [PATCH 5.17 20/39] netfilter: nf_tables: initialize registers in nft_do_chain() From: Pablo Neira Ayuso <pablo@...filter.org> commit 4c905f6740a365464e91467aa50916555b28213d upstream. Initialize registers to avoid stack leak into userspace. Fixes: 96518518cc41 ("netfilter: add nftables") Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- net/netfilter/nf_tables_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/net/netfilter/nf_tables_core.c +++ b/net/netfilter/nf_tables_core.c @@ -201,7 +201,7 @@ nft_do_chain(struct nft_pktinfo *pkt, vo const struct nft_rule_dp *rule, *last_rule; const struct net *net = nft_net(pkt); 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);
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