Hi Nikolay, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on net/master] url: https://github.com/0day-ci/linux/commits/Nikolay-Aleksandrov/net-ipv6-mak... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git 2191b1dfef7d45f44b5008d2148676d9f2c82874 config: x86_64-randconfig-s032-20211128 (https://download.01.org/0day-ci/archive/20211130/202111300910.7HWZTGBF-lk...) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.4-dirty # https://github.com/0day-ci/linux/commit/2db1685345b4a1aecadba0a8197c79f5e... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Nikolay-Aleksandrov/net-ipv6-make-fib6_nh_init-properly-clean-after-itself-on-error/20211130-001132 git checkout 2db1685345b4a1aecadba0a8197c79f5e49da8ec # save the config file to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) net/ipv4/nexthop.c: note: in included file (through include/linux/sysctl.h, include/net/net_namespace.h, include/linux/netdevice.h, ...): include/linux/rbtree.h:74:9: sparse: sparse: incompatible types in comparison expression (different address spaces): include/linux/rbtree.h:74:9: sparse: struct rb_node [noderef] __rcu * include/linux/rbtree.h:74:9: sparse: struct rb_node * vim +/out +2570 net/ipv4/nexthop.c 597cfe4fc3390a David Ahern 2019-05-24 2544 53010f991a9f5e David Ahern 2019-05-24 2545 static int nh_create_ipv6(struct net *net, struct nexthop *nh, 53010f991a9f5e David Ahern 2019-05-24 2546 struct nh_info *nhi, struct nh_config *cfg, 53010f991a9f5e David Ahern 2019-05-24 2547 struct netlink_ext_ack *extack) 53010f991a9f5e David Ahern 2019-05-24 2548 { 53010f991a9f5e David Ahern 2019-05-24 2549 struct fib6_nh *fib6_nh = &nhi->fib6_nh; 53010f991a9f5e David Ahern 2019-05-24 2550 struct fib6_config fib6_cfg = { 53010f991a9f5e David Ahern 2019-05-24 2551 .fc_table = l3mdev_fib_table(cfg->dev), 53010f991a9f5e David Ahern 2019-05-24 2552 .fc_ifindex = cfg->nh_ifindex, 53010f991a9f5e David Ahern 2019-05-24 2553 .fc_gateway = cfg->gw.ipv6, 53010f991a9f5e David Ahern 2019-05-24 2554 .fc_flags = cfg->nh_flags, 9aca491e0dccf8 Ryoga Saito 2021-09-02 2555 .fc_nlinfo = cfg->nlinfo, b513bd035f4044 David Ahern 2019-05-24 2556 .fc_encap = cfg->nh_encap, b513bd035f4044 David Ahern 2019-05-24 2557 .fc_encap_type = cfg->nh_encap_type, 38428d68719c45 Roopa Prabhu 2020-05-21 2558 .fc_is_fdb = cfg->nh_fdb, 53010f991a9f5e David Ahern 2019-05-24 2559 }; 6f43e5252833f3 Colin Ian King 2019-05-30 2560 int err; 53010f991a9f5e David Ahern 2019-05-24 2561 53010f991a9f5e David Ahern 2019-05-24 2562 if (!ipv6_addr_any(&cfg->gw.ipv6)) 53010f991a9f5e David Ahern 2019-05-24 2563 fib6_cfg.fc_flags |= RTF_GATEWAY; 53010f991a9f5e David Ahern 2019-05-24 2564 53010f991a9f5e David Ahern 2019-05-24 2565 /* sets nh_dev if successful */ 53010f991a9f5e David Ahern 2019-05-24 2566 err = ipv6_stub->fib6_nh_init(net, fib6_nh, &fib6_cfg, GFP_KERNEL, 53010f991a9f5e David Ahern 2019-05-24 2567 extack); 2db1685345b4a1 Nikolay Aleksandrov 2021-11-29 2568 if (!err) 53010f991a9f5e David Ahern 2019-05-24 2569 nh->nh_flags = fib6_nh->fib_nh_flags; 1c743127cc54b1 Nikolay Aleksandrov 2021-11-23 @2570 out: 53010f991a9f5e David Ahern 2019-05-24 2571 return err; 53010f991a9f5e David Ahern 2019-05-24 2572 } 53010f991a9f5e David Ahern 2019-05-24 2573 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org