linux-kernel - [PATCH 5.17 106/219] netfilter: nf_tables: nft_parse

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Date:   Mon, 18 Apr 2022 14:11:15 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Antoine Tenart <atenart@...nel.org>,
        Pablo Neira Ayuso <pablo@...filter.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.17 106/219] netfilter: nf_tables: nft_parse_register can return a negative value

From: Antoine Tenart <atenart@...nel.org>

[ Upstream commit 6c6f9f31ecd47dce1d0dafca4bec8805f9bc97cd ]

Since commit 6e1acfa387b9 ("netfilter: nf_tables: validate registers
coming from userspace.") nft_parse_register can return a negative value,
but the function prototype is still returning an unsigned int.

Fixes: 6e1acfa387b9 ("netfilter: nf_tables: validate registers coming from userspace.")
Signed-off-by: Antoine Tenart <atenart@...nel.org>
Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 net/netfilter/nf_tables_api.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 1f5a0eece0d1..30d29d038d09 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -9275,7 +9275,7 @@ int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest)
 }
 EXPORT_SYMBOL_GPL(nft_parse_u32_check);
 
-static unsigned int nft_parse_register(const struct nlattr *attr, u32 *preg)
+static int nft_parse_register(const struct nlattr *attr, u32 *preg)
 {
 	unsigned int reg;
 
-- 
2.35.1