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Message-ID: <202507060106.A5xgr1Rs-lkp@intel.com>
Date: Sun, 6 Jul 2025 01:33:21 +0800
From: kernel test robot <lkp@...el.com>
To: Eric Woudstra <ericwouds@...il.com>,
Pablo Neira Ayuso <pablo@...filter.org>,
Jozsef Kadlecsik <kadlec@...filter.org>,
Nikolay Aleksandrov <razor@...ckwall.org>,
Ido Schimmel <idosch@...dia.com>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
Simon Horman <horms@...nel.org>
Cc: oe-kbuild-all@...ts.linux.dev, netdev@...r.kernel.org,
netfilter-devel@...r.kernel.org, bridge@...ts.linux.dev,
Eric Woudstra <ericwouds@...il.com>
Subject: Re: [PATCH v13 nf-next 1/3] netfilter: utils: nf_checksum(_partial)
correct data!=networkheader
Hi Eric,
kernel test robot noticed the following build warnings:
[auto build test WARNING on netfilter-nf/main]
[also build test WARNING on horms-ipvs/master linus/master v6.16-rc4 next-20250704]
[cannot apply to nf-next/master]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Eric-Woudstra/netfilter-utils-nf_checksum-_partial-correct-data-networkheader/20250705-031418
base: https://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git main
patch link: https://lore.kernel.org/r/20250704191135.1815969-2-ericwouds%40gmail.com
patch subject: [PATCH v13 nf-next 1/3] netfilter: utils: nf_checksum(_partial) correct data!=networkheader
config: x86_64-randconfig-121-20250705 (https://download.01.org/0day-ci/archive/20250706/202507060106.A5xgr1Rs-lkp@intel.com/config)
compiler: clang version 20.1.7 (https://github.com/llvm/llvm-project 6146a88f60492b520a36f8f8f3231e15f3cc6082)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250706/202507060106.A5xgr1Rs-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202507060106.A5xgr1Rs-lkp@intel.com/
sparse warnings: (new ones prefixed by >>)
>> net/netfilter/utils.c:131:24: sparse: sparse: incorrect type in return expression (different base types) @@ expected restricted __sum16 @@ got int @@
net/netfilter/utils.c:131:24: sparse: expected restricted __sum16
net/netfilter/utils.c:131:24: sparse: got int
net/netfilter/utils.c:155:24: sparse: sparse: incorrect type in return expression (different base types) @@ expected restricted __sum16 @@ got int @@
net/netfilter/utils.c:155:24: sparse: expected restricted __sum16
net/netfilter/utils.c:155:24: sparse: got int
vim +131 net/netfilter/utils.c
122
123 __sum16 nf_checksum(struct sk_buff *skb, unsigned int hook,
124 unsigned int dataoff, u8 protocol,
125 unsigned short family)
126 {
127 unsigned int nhpull = skb_network_header(skb) - skb->data;
128 __sum16 csum = 0;
129
130 if (!pskb_may_pull(skb, nhpull))
> 131 return -ENOMEM;
132 __skb_pull(skb, nhpull);
133 switch (family) {
134 case AF_INET:
135 csum = nf_ip_checksum(skb, hook, dataoff - nhpull, protocol);
136 break;
137 case AF_INET6:
138 csum = nf_ip6_checksum(skb, hook, dataoff - nhpull, protocol);
139 break;
140 }
141 __skb_push(skb, nhpull);
142
143 return csum;
144 }
145 EXPORT_SYMBOL_GPL(nf_checksum);
146
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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