tree: https://git.kernel.org/pub/scm/linux/kernel/git/leon/linux-rdma.git rdma-next head: 773349feb182515e85e5ecfa7745dcd6c37cfc91 commit: 2bba7a3cc66fbfe94a3a1955f8fe5b983bf0a183 [32/55] RDMA/core: Update write interface to use automatic object lifetime compiler: gcc-9 (Debian 9.3.0-14) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; cppcheck warnings: (new ones prefixed by >>) uobj->object = mw; ^ drivers/infiniband/core/uverbs_cmd.c:893:15: note: Variable 'uobj->object' is reassigned a value before the old one has been used. uobj->object = mw; ^ drivers/infiniband/core/uverbs_cmd.c:895:15: note: Variable 'uobj->object' is reassigned a value before the old one has been used. uobj->object = mw; ^ drivers/infiniband/core/uverbs_cmd.c:1066:6: warning: Variable 'ret' is reassigned a value before the old one has been used. [redundantAssignment] ret = uverbs_request(attrs, &cmd, sizeof(cmd)); ^ drivers/infiniband/core/uverbs_cmd.c:1064:0: note: Variable 'ret' is reassigned a value before the old one has been used. int ret = -EINVAL; ^ drivers/infiniband/core/uverbs_cmd.c:1066:6: note: Variable 'ret' is reassigned a value before the old one has been used. ret = uverbs_request(attrs, &cmd, sizeof(cmd)); ^ drivers/infiniband/core/uverbs_cmd.c:1897:47: warning: Shifting signed 32-bit value by 31 bits is undefined behaviour [shiftTooManyBitsSigned] BUILD_BUG_ON(IB_USER_LAST_QP_ATTR_MASK == (1 << 31)); ^ vim +895 drivers/infiniband/core/uverbs_cmd.c 852 853 static int ib_uverbs_alloc_mw(struct uverbs_attr_bundle *attrs) 854 { 855 struct ib_uverbs_alloc_mw cmd; 856 struct ib_uverbs_alloc_mw_resp resp; 857 struct ib_uobject *uobj; 858 struct ib_pd *pd; 859 struct ib_mw *mw; 860 int ret; 861 struct ib_device *ib_dev; 862 863 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 864 if (ret) 865 return ret; 866 867 uobj = uobj_alloc(UVERBS_OBJECT_MW, attrs, &ib_dev); 868 if (IS_ERR(uobj)) 869 return PTR_ERR(uobj); 870 871 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 872 if (!pd) { 873 ret = -EINVAL; 874 goto err_free; 875 } 876 877 if (cmd.mw_type != IB_MW_TYPE_1 && cmd.mw_type != IB_MW_TYPE_2) { 878 ret = -EINVAL; 879 goto err_put; 880 } 881 882 mw = pd->device->ops.alloc_mw(pd, cmd.mw_type, &attrs->driver_udata); 883 if (IS_ERR(mw)) { 884 ret = PTR_ERR(mw); 885 goto err_put; 886 } 887 888 mw->device = pd->device; 889 mw->pd = pd; 890 mw->uobject = uobj; 891 atomic_inc(&pd->usecnt); 892 893 uobj->object = mw; 894 896 uobj_put_obj_read(pd); 897 uobj_finalize_uobj_create(uobj, attrs); 898 899 resp.rkey = mw->rkey; 900 resp.mw_handle = uobj->id; 901 return uverbs_response(attrs, &resp, sizeof(resp)); 902 903 err_put: 904 uobj_put_obj_read(pd); 905 err_free: 906 uobj_alloc_abort(uobj, attrs); 907 return ret; 908 } 909 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org