netdev - [PATCH nf] netfilter: nf_tables: nft_parse_register can return a negative value

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Date:   Tue, 12 Apr 2022 10:14:59 +0200
From:   Antoine Tenart <atenart@...nel.org>
To:     pablo@...filter.org, kadlec@...filter.org, fw@...len.de
Cc:     Antoine Tenart <atenart@...nel.org>,
        netfilter-devel@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH nf] netfilter: nf_tables: nft_parse_register can return a negative value

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.")
Cc: Pablo Neira Ayuso <pablo@...filter.org>
Signed-off-by: Antoine Tenart <atenart@...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 128ee3b300d6..16c3a39689f4 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -9363,7 +9363,7 @@ 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