From: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx> commit 4c905f6740a365464e91467aa50916555b28213d upstream. Initialize registers to avoid stack leak into userspace. Fixes: 96518518cc41 ("netfilter: add nftables") Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- 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 @@ -127,7 +127,7 @@ nft_do_chain(struct nft_pktinfo *pkt, vo const struct net *net = pkt->net; 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]; struct nft_stats *stats; Patches currently in stable-queue which might be from pablo@xxxxxxxxxxxxx are queue-4.9/netfilter-nf_tables-initialize-registers-in-nft_do_chain.patch