tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 5d9f4cf36721aba199975a9be7863a3ff5cd4b59 commit: 161eba50e183ed4ca20f6d8dec19bdc526d2b2b9 mctp: Add initial test structure and fragmentation test date: 7 weeks ago config: powerpc64-randconfig-r023-20211124 (https://download.01.org/0day-ci/archive/20211124/202111242036.yDuA29vn-lk...) compiler: powerpc64-linux-gcc (GCC) 11.2.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 161eba50e183ed4ca20f6d8dec19bdc526d2b2b9 # save the config file to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=powerpc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): In file included from net/mctp/route.c:1234: net/mctp/test/route-test.c: In function 'mctp_test_fragment': 186 | } | ^ vim +186 net/mctp/test/route-test.c 101 102 static void mctp_test_fragment(struct kunit *test) 103 { 104 const struct mctp_frag_test *params; 105 int rc, i, n, mtu, msgsize; 106 struct mctp_test_route *rt; 107 struct sk_buff *skb; 108 struct mctp_hdr hdr; 109 u8 seq; 110 111 params = test->param_value; 112 mtu = params->mtu; 113 msgsize = params->msgsize; 114 115 hdr.ver = 1; 116 hdr.src = 8; 117 hdr.dest = 10; 118 hdr.flags_seq_tag = MCTP_HDR_FLAG_TO; 119 120 skb = mctp_test_create_skb(&hdr, msgsize); 121 KUNIT_ASSERT_TRUE(test, skb); 122 123 rt = mctp_test_create_route(&init_net, 10, mtu); 124 KUNIT_ASSERT_TRUE(test, rt); 125 126 /* The refcount would usually be incremented as part of a route lookup, 127 * but we're setting the route directly here. 128 */ 129 refcount_inc(&rt->rt.refs); 130 131 rc = mctp_do_fragment_route(&rt->rt, skb, mtu, MCTP_TAG_OWNER); 132 KUNIT_EXPECT_FALSE(test, rc); 133 134 n = rt->pkts.qlen; 135 136 KUNIT_EXPECT_EQ(test, n, params->n_frags); 137 138 for (i = 0;; i++) { 139 struct mctp_hdr *hdr2; 140 struct sk_buff *skb2; 141 u8 tag_mask, seq2; 142 bool first, last; 143 144 first = i == 0; 145 last = i == (n - 1); 146 147 skb2 = skb_dequeue(&rt->pkts); 148 149 if (!skb2) 150 break; 151 152 hdr2 = mctp_hdr(skb2); 153 154 tag_mask = MCTP_HDR_TAG_MASK | MCTP_HDR_FLAG_TO; 155 156 KUNIT_EXPECT_EQ(test, hdr2->ver, hdr.ver); 157 KUNIT_EXPECT_EQ(test, hdr2->src, hdr.src); 158 KUNIT_EXPECT_EQ(test, hdr2->dest, hdr.dest); 159 KUNIT_EXPECT_EQ(test, hdr2->flags_seq_tag & tag_mask, 160 hdr.flags_seq_tag & tag_mask); 161 162 KUNIT_EXPECT_EQ(test, 163 !!(hdr2->flags_seq_tag & MCTP_HDR_FLAG_SOM), first); 164 KUNIT_EXPECT_EQ(test, 165 !!(hdr2->flags_seq_tag & MCTP_HDR_FLAG_EOM), last); 166 167 seq2 = (hdr2->flags_seq_tag >> MCTP_HDR_SEQ_SHIFT) & 168 MCTP_HDR_SEQ_MASK; 169 170 if (first) { 171 seq = seq2; 172 } else { 173 seq++; 174 KUNIT_EXPECT_EQ(test, seq2, seq & MCTP_HDR_SEQ_MASK); 175 } 176 177 if (!last) 178 KUNIT_EXPECT_EQ(test, skb2->len, mtu); 179 else 180 KUNIT_EXPECT_LE(test, skb2->len, mtu); 181 182 kfree_skb(skb2); 183 } 184 185 mctp_test_route_destroy(test, rt); 187 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org