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netfilter: nf_tables: initialize registers in nft_do_chain() 

Initialize registers to avoid stack leak into userspace.

Fixes: 96518518cc ("netfilter: add nftables")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Pablo Neira Ayuso 2022-03-17 12:04:42 +01:00
parent 6e1acfa387
commit 4c905f6740
1 changed files with 1 additions and 1 deletions
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2
net/netfilter/nf_tables_core.c
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@ -201,7 +201,7 @@ nft_do_chain(struct nft_pktinfo *pkt, void *priv)
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);