tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: db503865b9ba6284edfee3825846a464cc4f4c61 commit: 8550ff8d8c75416e984d9c4b082845e57e560984 [845/1131] skbuff: Release nfct refcount on napi stolen or re-used skbs config: um-x86_64_defconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=8550ff8d8c75416e984d9c4b082845e57e560984 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 8550ff8d8c75416e984d9c4b082845e57e560984 # save the attached .config to linux build tree make W=1 ARCH=um SUBARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> Note: the linux-next/master HEAD db503865b9ba6284edfee3825846a464cc4f4c61 builds fine. It may have been fixed somewhere. All errors (new ones prefixed by >>): net/core/dev.c: In function 'gro_list_prepare': >> net/core/dev.c:6015:33: error: implicit declaration of function 'skb_ext_find'; did you mean 'skb_ext_copy'? [-Werror=implicit-function-declaration] 6015 | struct tc_skb_ext *skb_ext = skb_ext_find(skb, TC_SKB_EXT); | ^~~~~~~~~~~~ | skb_ext_copy net/core/dev.c:6015:51: error: 'TC_SKB_EXT' undeclared (first use in this function) 6015 | struct tc_skb_ext *skb_ext = skb_ext_find(skb, TC_SKB_EXT); | ^~~~~~~~~~ net/core/dev.c:6015:51: note: each undeclared identifier is reported only once for each function it appears in net/core/dev.c:6020:19: error: dereferencing pointer to incomplete type 'struct tc_skb_ext' 6020 | diffs |= p_ext->chain ^ skb_ext->chain; | ^~ cc1: some warnings being treated as errors vim +6015 net/core/dev.c 5980 5981 static void gro_list_prepare(const struct list_head *head, 5982 const struct sk_buff *skb) 5983 { 5984 unsigned int maclen = skb->dev->hard_header_len; 5985 u32 hash = skb_get_hash_raw(skb); 5986 struct sk_buff *p; 5987 5988 list_for_each_entry(p, head, list) { 5989 unsigned long diffs; 5990 5991 NAPI_GRO_CB(p)->flush = 0; 5992 5993 if (hash != skb_get_hash_raw(p)) { 5994 NAPI_GRO_CB(p)->same_flow = 0; 5995 continue; 5996 } 5997 5998 diffs = (unsigned long)p->dev ^ (unsigned long)skb->dev; 5999 diffs |= skb_vlan_tag_present(p) ^ skb_vlan_tag_present(skb); 6000 if (skb_vlan_tag_present(p)) 6001 diffs |= skb_vlan_tag_get(p) ^ skb_vlan_tag_get(skb); 6002 diffs |= skb_metadata_dst_cmp(p, skb); 6003 diffs |= skb_metadata_differs(p, skb); 6004 if (maclen == ETH_HLEN) 6005 diffs |= compare_ether_header(skb_mac_header(p), 6006 skb_mac_header(skb)); 6007 else if (!diffs) 6008 diffs = memcmp(skb_mac_header(p), 6009 skb_mac_header(skb), 6010 maclen); 6011 6012 diffs |= skb_get_nfct(p) ^ skb_get_nfct(skb); 6013 6014 if (!diffs) { > 6015 struct tc_skb_ext *skb_ext = skb_ext_find(skb, TC_SKB_EXT); 6016 struct tc_skb_ext *p_ext = skb_ext_find(p, TC_SKB_EXT); 6017 6018 diffs |= (!!p_ext) ^ (!!skb_ext); 6019 if (!diffs && unlikely(skb_ext)) 6020 diffs |= p_ext->chain ^ skb_ext->chain; 6021 } 6022 6023 NAPI_GRO_CB(p)->same_flow = !diffs; 6024 } 6025 } 6026 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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