tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 805c6d3c19210c90c109107d189744e960eae025 commit: eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5 KVM: SVM: Move SEV code to separate file date: 6 months ago config: x86_64-randconfig-s022-20200922 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.2-201-g24bdaac6-dirty git checkout eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5 # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <[email protected]> sparse warnings: (new ones prefixed by >>) >> arch/x86/kvm/svm/sev.c:672:60: sparse: sparse: dereference of noderef >> expression >> arch/x86/kvm/svm/sev.c:672:60: sparse: sparse: dereference of noderef >> expression arch/x86/kvm/svm/sev.c:695:14: sparse: sparse: dereference of noderef expression arch/x86/kvm/svm/sev.c:701:59: sparse: sparse: dereference of noderef expression arch/x86/kvm/svm/sev.c:701:59: sparse: sparse: dereference of noderef expression arch/x86/kvm/svm/sev.c:715:14: sparse: sparse: dereference of noderef expression arch/x86/kvm/svm/sev.c:740:70: sparse: sparse: dereference of noderef expression arch/x86/kvm/svm/sev.c:740:70: sparse: sparse: dereference of noderef expression # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5 vim +672 arch/x86/kvm/svm/sev.c 646 647 static int __sev_dbg_decrypt_user(struct kvm *kvm, unsigned long paddr, 648 unsigned long __user dst_uaddr, 649 unsigned long dst_paddr, 650 int size, int *err) 651 { 652 struct page *tpage = NULL; 653 int ret, offset; 654 655 /* if inputs are not 16-byte then use intermediate buffer */ 656 if (!IS_ALIGNED(dst_paddr, 16) || 657 !IS_ALIGNED(paddr, 16) || 658 !IS_ALIGNED(size, 16)) { 659 tpage = (void *)alloc_page(GFP_KERNEL); 660 if (!tpage) 661 return -ENOMEM; 662 663 dst_paddr = __sme_page_pa(tpage); 664 } 665 666 ret = __sev_dbg_decrypt(kvm, paddr, dst_paddr, size, err); 667 if (ret) 668 goto e_free; 669 670 if (tpage) { 671 offset = paddr & 15; > 672 if (copy_to_user((void __user *)(uintptr_t)dst_uaddr, 673 page_address(tpage) + offset, size)) 674 ret = -EFAULT; 675 } 676 677 e_free: 678 if (tpage) 679 __free_page(tpage); 680 681 return ret; 682 } 683 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/[email protected]
.config.gz
Description: application/gzip
