netfilter: nf_tables: use kzalloc for hook allocation

[ Upstream commit 195e5f88c2e48330ba5483e0bad2de3b3fad484f ]

KMSAN reports unitialized variable when registering the hook,
   reg->hook_ops_type == NF_HOOK_OP_BPF)
        ~~~~~~~~~~~ undefined

This is a small structure, just use kzalloc to make sure this
won't happen again when new fields get added to nf_hook_ops.

Fixes: 7b4b2fa37587 ("netfilter: annotate nf_tables base hook ops")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 36fdce00bdab4975bcf142c4e0dc3dc975959952..8808d78d652358cd9d02802098a70f6b36c19355 100644 (file)
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -2084,7 +2084,7 @@ static struct nft_hook *nft_netdev_hook_alloc(struct net *net,
        struct nft_hook *hook;
        int err;
 
-       hook = kmalloc(sizeof(struct nft_hook), GFP_KERNEL_ACCOUNT);
+       hook = kzalloc(sizeof(struct nft_hook), GFP_KERNEL_ACCOUNT);
        if (!hook) {
                err = -ENOMEM;
                goto err_hook_alloc;