diff mbox series

[5.17,20/39] netfilter: nf_tables: initialize registers in nft_do_chain()

Message ID 20220325150420.822067034@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg KH March 25, 2022, 3:14 p.m. UTC 
From: Pablo Neira Ayuso <pablo@netfilter.org>

commit 4c905f6740a365464e91467aa50916555b28213d upstream.

Initialize registers to avoid stack leak into userspace.

Fixes: 96518518cc41 ("netfilter: add nftables")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/netfilter/nf_tables_core.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

--- 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);