diff mbox series

[SRU,Focal/Jammy,1/1] netfilter: nf_tables: initialize registers in nft_do_chain()

Message ID 20220407141913.363116-2-cascardo@canonical.com
State New
Headers show
Series CVE-2022-1016 | expand

Commit Message

Thadeu Lima de Souza Cascardo April 7, 2022, 2:19 p.m. UTC 
From: Pablo Neira Ayuso <pablo@netfilter.org>

Initialize registers to avoid stack leak into userspace.

Fixes: 96518518cc41 ("netfilter: add nftables")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
(cherry picked from commit 4c905f6740a365464e91467aa50916555b28213d)
CVE-2022-1016
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
---
 net/netfilter/nf_tables_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/net/netfilter/nf_tables_core.c b/net/netfilter/nf_tables_core.c
index 866cfba04d6c..907e848dbc17 100644
--- a/net/netfilter/nf_tables_core.c
+++ b/net/netfilter/nf_tables_core.c
@@ -162,7 +162,7 @@  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);