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Message-ID: <202012120122.2HjKvTAN-lkp@intel.com>
Date: Sat, 12 Dec 2020 01:25:57 +0800
From: kernel test robot <lkp@...el.com>
To: Jonas Bonn <jonas@...rbonn.se>, netdev@...r.kernel.org
Cc: kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
pablo@...filter.org, laforge@...monks.org,
Jonas Bonn <jonas@...rbonn.se>
Subject: Re: [PATCH net-next v2 12/12] gtp: add dst_cache to tunnels
Hi Jonas,
I love your patch! Yet something to improve:
[auto build test ERROR on net-next/master]
url: https://github.com/0day-ci/linux/commits/Jonas-Bonn/gtp-IPv6-support/20201211-203639
base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 91163f82143630a9629a8bf0227d49173697c69c
config: mips-randconfig-r026-20201209 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 5ff35356f1af2bb92785b38c657463924d9ec386)
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
# install mips cross compiling tool for clang build
# apt-get install binutils-mips-linux-gnu
# https://github.com/0day-ci/linux/commit/a8ea47bc0c1903be018f4d566bb96146c156ddce
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Jonas-Bonn/gtp-IPv6-support/20201211-203639
git checkout a8ea47bc0c1903be018f4d566bb96146c156ddce
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=mips
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
All error/warnings (new ones prefixed by >>):
drivers/net/gtp.c:471:2: warning: variable 'err' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized]
if (!ptype)
^~~~~~~~~~~
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:58:30: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/gtp.c:482:9: note: uninitialized use occurs here
return err;
^~~
drivers/net/gtp.c:471:2: note: remove the 'if' if its condition is always false
if (!ptype)
^~~~~~~~~~~
include/linux/compiler.h:56:23: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
drivers/net/gtp.c:465:2: warning: variable 'err' is used uninitialized whenever switch default is taken [-Wsometimes-uninitialized]
default:
^~~~~~~
drivers/net/gtp.c:482:9: note: uninitialized use occurs here
return err;
^~~
drivers/net/gtp.c:441:9: note: initialize the variable 'err' to silence this warning
int err;
^
= 0
>> drivers/net/gtp.c:627:8: error: implicit declaration of function 'dst_cache_get_ip6' [-Werror,-Wimplicit-function-declaration]
dst = dst_cache_get_ip6(dst_cache, saddr);
^
drivers/net/gtp.c:627:8: note: did you mean 'dst_cache_get_ip4'?
include/net/dst_cache.h:33:16: note: 'dst_cache_get_ip4' declared here
struct rtable *dst_cache_get_ip4(struct dst_cache *dst_cache, __be32 *saddr);
^
>> drivers/net/gtp.c:627:6: warning: incompatible integer to pointer conversion assigning to 'struct dst_entry *' from 'int' [-Wint-conversion]
dst = dst_cache_get_ip6(dst_cache, saddr);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/net/gtp.c:649:2: error: implicit declaration of function 'dst_cache_set_ip6' [-Werror,-Wimplicit-function-declaration]
dst_cache_set_ip6(dst_cache, dst, saddr);
^
3 warnings and 2 errors generated.
vim +/dst_cache_get_ip6 +627 drivers/net/gtp.c
615
616 static struct dst_entry *gtp_get_v6_dst(struct sk_buff *skb,
617 struct net_device *dev,
618 struct pdp_ctx *pctx,
619 struct in6_addr *saddr)
620 {
621 const struct sock *sk = pctx->sk;
622 struct dst_entry *dst = NULL;
623 struct dst_cache *dst_cache;
624 struct flowi6 fl6;
625
626 dst_cache = (struct dst_cache *)&pctx->dst_cache;
> 627 dst = dst_cache_get_ip6(dst_cache, saddr);
628 if (dst)
629 return dst;
630
631 memset(&fl6, 0, sizeof(fl6));
632 fl6.flowi6_mark = skb->mark;
633 fl6.flowi6_proto = IPPROTO_UDP;
634 fl6.daddr = pctx->peer_addr;
635
636 dst = ipv6_stub->ipv6_dst_lookup_flow(sock_net(sk), sk, &fl6, NULL);
637 if (IS_ERR(dst)) {
638 netdev_dbg(pctx->dev, "no route to %pI6\n", &fl6.daddr);
639 return ERR_PTR(-ENETUNREACH);
640 }
641 if (dst->dev == pctx->dev) {
642 netdev_dbg(pctx->dev, "circular route to %pI6\n", &fl6.daddr);
643 dst_release(dst);
644 return ERR_PTR(-ELOOP);
645 }
646
647 *saddr = fl6.saddr;
648
> 649 dst_cache_set_ip6(dst_cache, dst, saddr);
650
651 return dst;
652 }
653
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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