Hi John, I love your patch! Perhaps something to improve: [auto build test WARNING on bpf-next/master] url: https://github.com/0day-ci/linux/commits/John-Fastabend/sockmap-sk_skb-program-memory-acct-fixes/20201009-124625 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master config: riscv-allyesconfig (attached as .config) compiler: riscv64-linux-gcc (GCC) 9.3.0 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/3a8d6f22c5f47a013278031170cb559d1f6d1e69 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review John-Fastabend/sockmap-sk_skb-program-memory-acct-fixes/20201009-124625 git checkout 3a8d6f22c5f47a013278031170cb559d1f6d1e69 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=riscv If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): net/core/skmsg.c: In function 'sk_psock_skb_redirect': >> net/core/skmsg.c:714:7: warning: variable 'ingress' set but not used [-Wunused-but-set-variable] 714 | bool ingress; | ^~~~~~~ vim +/ingress +714 net/core/skmsg.c 604326b41a6fb9 Daniel Borkmann 2018-10-13 709 93dd5f185916b0 John Fastabend 2020-06-25 710 static void sk_psock_skb_redirect(struct sk_buff *skb) 604326b41a6fb9 Daniel Borkmann 2018-10-13 711 { 604326b41a6fb9 Daniel Borkmann 2018-10-13 712 struct sk_psock *psock_other; 604326b41a6fb9 Daniel Borkmann 2018-10-13 713 struct sock *sk_other; 604326b41a6fb9 Daniel Borkmann 2018-10-13 @714 bool ingress; 604326b41a6fb9 Daniel Borkmann 2018-10-13 715 ca2f5f21dbbd5e John Fastabend 2020-05-29 716 sk_other = tcp_skb_bpf_redirect_fetch(skb); 3a8d6f22c5f47a John Fastabend 2020-10-08 717 /* This error is a buggy BPF program, it returned a redirect 3a8d6f22c5f47a John Fastabend 2020-10-08 718 * return code, but then didn't set a redirect interface. 3a8d6f22c5f47a John Fastabend 2020-10-08 719 */ ca2f5f21dbbd5e John Fastabend 2020-05-29 720 if (unlikely(!sk_other)) { ca2f5f21dbbd5e John Fastabend 2020-05-29 721 kfree_skb(skb); ca2f5f21dbbd5e John Fastabend 2020-05-29 722 return; ca2f5f21dbbd5e John Fastabend 2020-05-29 723 } ca2f5f21dbbd5e John Fastabend 2020-05-29 724 psock_other = sk_psock(sk_other); 3a8d6f22c5f47a John Fastabend 2020-10-08 725 /* This error indicates the socket is being torn down or had another 3a8d6f22c5f47a John Fastabend 2020-10-08 726 * error that caused the pipe to break. We can't send a packet on 3a8d6f22c5f47a John Fastabend 2020-10-08 727 * a socket that is in this state so we drop the skb. 3a8d6f22c5f47a John Fastabend 2020-10-08 728 */ ca2f5f21dbbd5e John Fastabend 2020-05-29 729 if (!psock_other || sock_flag(sk_other, SOCK_DEAD) || ca2f5f21dbbd5e John Fastabend 2020-05-29 730 !sk_psock_test_state(psock_other, SK_PSOCK_TX_ENABLED)) { ca2f5f21dbbd5e John Fastabend 2020-05-29 731 kfree_skb(skb); ca2f5f21dbbd5e John Fastabend 2020-05-29 732 return; ca2f5f21dbbd5e John Fastabend 2020-05-29 733 } ca2f5f21dbbd5e John Fastabend 2020-05-29 734 ca2f5f21dbbd5e John Fastabend 2020-05-29 735 ingress = tcp_skb_bpf_ingress(skb); ca2f5f21dbbd5e John Fastabend 2020-05-29 736 skb_queue_tail(&psock_other->ingress_skb, skb); ca2f5f21dbbd5e John Fastabend 2020-05-29 737 schedule_work(&psock_other->work); ca2f5f21dbbd5e John Fastabend 2020-05-29 738 } ca2f5f21dbbd5e John Fastabend 2020-05-29 739 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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