* Re: [PATCH net v2] net: ipv6: fix TCP GSO segmentation with NAT
[not found] <20250310112121.73654-1-nbd@nbd.name>
@ 2025-03-11 19:01 ` kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2025-03-11 19:01 UTC (permalink / raw)
To: Felix Fietkau, netdev, Eric Dumazet, Neal Cardwell,
Kuniyuki Iwashima, David S. Miller, David Ahern, Jakub Kicinski,
Paolo Abeni, Simon Horman, Willem de Bruijn
Cc: llvm, oe-kbuild-all, linux-kernel
Hi Felix,
kernel test robot noticed the following build warnings:
[auto build test WARNING on net/main]
url: https://github.com/intel-lab-lkp/linux/commits/Felix-Fietkau/net-ipv6-fix-TCP-GSO-segmentation-with-NAT/20250310-192256
base: net/main
patch link: https://lore.kernel.org/r/20250310112121.73654-1-nbd%40nbd.name
patch subject: [PATCH net v2] net: ipv6: fix TCP GSO segmentation with NAT
config: s390-randconfig-001-20250312 (https://download.01.org/0day-ci/archive/20250312/202503120224.LbO66Ztw-lkp@intel.com/config)
compiler: clang version 15.0.7 (https://github.com/llvm/llvm-project 8dfdcc7b7bf66834a761bd8de445840ef68e4d1a)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250312/202503120224.LbO66Ztw-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202503120224.LbO66Ztw-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> net/ipv6/tcpv6_offload.c:104:30: warning: variable 'th' is uninitialized when used here [-Wuninitialized]
inet_proto_csum_replace16(&th->check, seg,
^~
net/ipv6/tcpv6_offload.c:101:19: note: initialize the variable 'th' to silence this warning
struct tcphdr *th;
^
= NULL
1 warning generated.
vim +/th +104 net/ipv6/tcpv6_offload.c
95
96 static void __tcpv6_gso_segment_csum(struct sk_buff *seg,
97 struct in6_addr *oldip,
98 const struct in6_addr *newip,
99 __be16 *oldport, __be16 newport)
100 {
101 struct tcphdr *th;
102
103 if (!ipv6_addr_equal(oldip, newip)) {
> 104 inet_proto_csum_replace16(&th->check, seg,
105 oldip->s6_addr32,
106 newip->s6_addr32,
107 true);
108 *oldip = *newip;
109 }
110
111 if (*oldport == newport)
112 return;
113
114 th = tcp_hdr(seg);
115 inet_proto_csum_replace2(&th->check, seg, *oldport, newport, false);
116 *oldport = newport;
117 }
118
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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