Re: [PATCH net-next] netfilter: conntrack: add a new NF_CT_EXT_EXPAND extension

From: kbuild test robot
Date: Tue Jun 27 2017 - 06:07:45 EST

Hi Lin,

[auto build test ERROR on net-next/master]

url: https://github.com/0day-ci/linux/commits/Lin-Zhang/netfilter-conntrack-add-a-new-NF_CT_EXT_EXPAND-extension/20170627-000844
config: i386-allyesconfig (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
# save the attached .config to linux build tree
make ARCH=i386

All errors (new ones prefixed by >>):

In function 'total_extension_size',
inlined from 'nf_conntrack_init_start' at net//netfilter/nf_conntrack_core.c:1893:25:
>> net//netfilter/nf_conntrack_core.c:1859:171: error: call to '__compiletime_assert_1859' declared with attribute error: BUILD_BUG_ON failed: NF_CT_EXT_NUM > 9
BUILD_BUG_ON(NF_CT_EXT_NUM > 9);
^

vim +/__compiletime_assert_1859 +1859 net//netfilter/nf_conntrack_core.c

fae718dda Patrick McHardy 2007-12-24 1853 module_param_call(hashsize, nf_conntrack_set_hashsize, param_get_uint,
9fb9cbb10 Yasuyuki Kozakai 2005-11-09 1854 &nf_conntrack_htable_size, 0600);
9fb9cbb10 Yasuyuki Kozakai 2005-11-09 1855
ab71632c4 Geert Uytterhoeven 2017-05-03 1856 static __always_inline unsigned int total_extension_size(void)
b3a5db109 Florian Westphal 2017-04-16 1857 {
b3a5db109 Florian Westphal 2017-04-16 1858 /* remember to add new extensions below */
b3a5db109 Florian Westphal 2017-04-16 @1859 BUILD_BUG_ON(NF_CT_EXT_NUM > 9);
b3a5db109 Florian Westphal 2017-04-16 1860
b3a5db109 Florian Westphal 2017-04-16 1861 return sizeof(struct nf_ct_ext) +
b3a5db109 Florian Westphal 2017-04-16 1862 sizeof(struct nf_conn_help)
b3a5db109 Florian Westphal 2017-04-16 1863 #if IS_ENABLED(CONFIG_NF_NAT)
b3a5db109 Florian Westphal 2017-04-16 1864 + sizeof(struct nf_conn_nat)
b3a5db109 Florian Westphal 2017-04-16 1865 #endif
b3a5db109 Florian Westphal 2017-04-16 1866 + sizeof(struct nf_conn_seqadj)
b3a5db109 Florian Westphal 2017-04-16 1867 + sizeof(struct nf_conn_acct)
b3a5db109 Florian Westphal 2017-04-16 1868 #ifdef CONFIG_NF_CONNTRACK_EVENTS
b3a5db109 Florian Westphal 2017-04-16 1869 + sizeof(struct nf_conntrack_ecache)
b3a5db109 Florian Westphal 2017-04-16 1870 #endif
b3a5db109 Florian Westphal 2017-04-16 1871 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
b3a5db109 Florian Westphal 2017-04-16 1872 + sizeof(struct nf_conn_tstamp)
b3a5db109 Florian Westphal 2017-04-16 1873 #endif
b3a5db109 Florian Westphal 2017-04-16 1874 #ifdef CONFIG_NF_CONNTRACK_TIMEOUT
b3a5db109 Florian Westphal 2017-04-16 1875 + sizeof(struct nf_conn_timeout)
b3a5db109 Florian Westphal 2017-04-16 1876 #endif
b3a5db109 Florian Westphal 2017-04-16 1877 #ifdef CONFIG_NF_CONNTRACK_LABELS
b3a5db109 Florian Westphal 2017-04-16 1878 + sizeof(struct nf_conn_labels)
b3a5db109 Florian Westphal 2017-04-16 1879 #endif
b3a5db109 Florian Westphal 2017-04-16 1880 #if IS_ENABLED(CONFIG_NETFILTER_SYNPROXY)
b3a5db109 Florian Westphal 2017-04-16 1881 + sizeof(struct nf_conn_synproxy)
b3a5db109 Florian Westphal 2017-04-16 1882 #endif
b3a5db109 Florian Westphal 2017-04-16 1883 ;
b3a5db109 Florian Westphal 2017-04-16 1884 };
b3a5db109 Florian Westphal 2017-04-16 1885
f94161c1b Gao feng 2013-01-21 1886 int nf_conntrack_init_start(void)
9fb9cbb10 Yasuyuki Kozakai 2005-11-09 1887 {
f205c5e0c Patrick McHardy 2007-07-07 1888 int max_factor = 8;
0c5366b3a Florian Westphal 2016-05-09 1889 int ret = -ENOMEM;
cc41c84b7 Florian Westphal 2017-04-14 1890 int i;
93bb0ceb7 Jesper Dangaard Brouer 2014-03-03 1891
b3a5db109 Florian Westphal 2017-04-16 1892 /* struct nf_ct_ext uses u8 to store offsets/size */
b3a5db109 Florian Westphal 2017-04-16 @1893 BUILD_BUG_ON(total_extension_size() > 255u);
b3a5db109 Florian Westphal 2017-04-16 1894
a3efd8120 Florian Westphal 2016-04-18 1895 seqcount_init(&nf_conntrack_generation);
a3efd8120 Florian Westphal 2016-04-18 1896

:::::: The code at line 1859 was first introduced by commit
:::::: b3a5db109e0670d6d168e9cd9de4d272a68f7c35 netfilter: conntrack: use u8 for extension sizes again

:::::: TO: Florian Westphal <fw@xxxxxxxxx>
:::::: CC: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>

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