Hi Liu, Thank you for the patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on v5.15-rc1 next-20210915] [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] url: https://github.com/0day-ci/linux/commits/Liu-Jian/skmsg-lose-offset-info-... base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 3ca706c189db861b2ca2019a0901b94050ca49d8 config: h8300-randconfig-r031-20210916 (attached as .config) compiler: h8300-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://github.com/0day-ci/linux/commit/7736d12e30a2ff3579225cc593898ef1a... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Liu-Jian/skmsg-lose-offset-info-in-sk_psock_skb_ingress/20210915-220839 git checkout 7736d12e30a2ff3579225cc593898ef1a24dc7aa # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=h8300 SHELL=/bin/bash net/core/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from include/linux/kernel.h:11, from include/linux/list.h:9, from include/linux/timer.h:5, from include/linux/workqueue.h:9, from include/linux/bpf.h:9, from include/linux/skmsg.h:7, from net/core/skmsg.c:4: include/linux/scatterlist.h: In function 'sg_set_buf': include/asm-generic/page.h:89:51: warning: ordered comparison of pointer with null pointer [-Wextra] 89 | #define virt_addr_valid(kaddr) (((void *)(kaddr) >= (void *)PAGE_OFFSET) && \ | ^~ include/linux/compiler.h:78:45: note: in definition of macro 'unlikely' 78 | # define unlikely(x) __builtin_expect(!!(x), 0) | ^ include/linux/scatterlist.h:143:9: note: in expansion of macro 'BUG_ON' 143 | BUG_ON(!virt_addr_valid(buf)); | ^~~~~~ include/linux/scatterlist.h:143:17: note: in expansion of macro 'virt_addr_valid' 143 | BUG_ON(!virt_addr_valid(buf)); | ^~~~~~~~~~~~~~~ net/core/skmsg.c: In function 'sk_psock_verdict_apply': 972 | len = skb->len; | ^~~ net/core/skmsg.c:972:25: note: each undeclared identifier is reported only once for each function it appears in 973 | off = 0; | ^~~ net/core/skmsg.c: At top level: net/core/skmsg.c:12:13: warning: 'sk_psock_strp_data_ready' declared 'static' but never defined [-Wunused-function] 12 | static void sk_psock_strp_data_ready(struct sock *sk); | ^~~~~~~~~~~~~~~~~~~~~~~~ vim +/len +972 net/core/skmsg.c 953 954 switch (verdict) { 955 case __SK_PASS: 956 err = -EIO; 957 sk_other = psock->sk; 958 if (sock_flag(sk_other, SOCK_DEAD) || 959 !sk_psock_test_state(psock, SK_PSOCK_TX_ENABLED)) { 960 goto out_free; 961 } 962 963 skb_bpf_set_ingress(skb); 964 965 /* If the queue is empty then we can submit directly 966 * into the msg queue. If its not empty we have to 967 * queue work otherwise we may get OOO data. Otherwise, 968 * if sk_psock_skb_ingress errors will be handled by 969 * retrying later from workqueue. 970 */ 971 if (skb_queue_empty(&psock->ingress_skb)) { 974 #if IS_ENABLED(CONFIG_BPF_STREAM_PARSER) 975 if (psock->sk->sk_data_ready == sk_psock_strp_data_ready) { 976 stm = strp_msg(skb); 977 off = stm->offset; 978 len = stm->full_len; 979 } 980 #endif 981 err = sk_psock_skb_ingress_self(psock, skb, off, len); 982 } 983 if (err < 0) { 984 spin_lock_bh(&psock->ingress_lock); 985 if (sk_psock_test_state(psock, SK_PSOCK_TX_ENABLED)) { 986 skb_queue_tail(&psock->ingress_skb, skb); 987 schedule_work(&psock->work); 988 err = 0; 989 } 990 spin_unlock_bh(&psock->ingress_lock); 991 if (err < 0) { 992 skb_bpf_redirect_clear(skb); 993 goto out_free; 994 } 995 } 996 break; 997 case __SK_REDIRECT: 998 err = sk_psock_skb_redirect(psock, skb); 999 break; 1000 case __SK_DROP: 1001 default: 1002 out_free: 1003 sock_drop(psock->sk, skb); 1004 } 1005 1006 return err; 1007 } 1008 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org