Hi K, Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on ipsec/master] [also build test WARNING on ipsec-next/master sparc-next/master net-next/master net/master v5.8-rc6 next-20200724] [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/B-K-Karthik/net-ipv6-fix-use-after-free-Read-in-__xfrm6_tunnel_spi_lookup/20200726-111019 base: https://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec.git master config: x86_64-randconfig-a001-20200726 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 8bf4c1f4fb257774f66c8cda07adc6c5e8668326) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <l...@intel.com> All warnings (new ones prefixed by >>): >> net/ipv6/xfrm6_tunnel.c:106:43: warning: cast to 'const xfrm_address_t *' >> from smaller integer type 'u32' (aka 'unsigned int') [-Wint-to-pointer-cast] int index = xfrm6_tunnel_spi_hash_byaddr((const xfrm_address_t *)spi); ^~~~~~~~~~~~~~~~~~~~~~~~~~~ net/ipv6/xfrm6_tunnel.c:69:28: warning: unused function 'xfrm6_tunnel_spi_hash_byspi' [-Wunused-function] static inline unsigned int xfrm6_tunnel_spi_hash_byspi(u32 spi) ^ 2 warnings generated. vim +106 net/ipv6/xfrm6_tunnel.c 101 102 static int __xfrm6_tunnel_spi_check(struct net *net, u32 spi) 103 { 104 struct xfrm6_tunnel_net *xfrm6_tn = xfrm6_tunnel_pernet(net); 105 struct xfrm6_tunnel_spi *x6spi; > 106 int index = xfrm6_tunnel_spi_hash_byaddr((const xfrm_address_t > *)spi); 107 108 hlist_for_each_entry(x6spi, 109 &xfrm6_tn->spi_byaddr[index], 110 list_byspi) { 111 if (x6spi->spi == spi) 112 return -1; 113 } 114 return index; 115 } 116 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-...@lists.01.org
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