tree: https://github.com/meghadey/crypto gcm_vaes head: 170448f9b4611af0d2d219a0888173f0ab9b290b commit: 170448f9b4611af0d2d219a0888173f0ab9b290b [3/3] working reproduce: # apt-get install sparse # sparse version: v0.6.1-193-gb8fad4bc-dirty git checkout 170448f9b4611af0d2d219a0888173f0ab9b290b make ARCH=x86_64 allmodconfig make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): arch/x86/crypto/aesni-intel_glue.c: In function 'gcmaes_crypt_by_sg': printk("Megha KeyLength %lx left %lxn", ctx->key_length, left); ~~^ ~~~~~~~~~~~~~~~ %x vim +813 arch/x86/crypto/aesni-intel_glue.c 718 719 static int gcmaes_crypt_by_sg(bool enc, struct aead_request *req, 720 unsigned int assoclen, u8 *hash_subkey, 721 u8 *iv, void *aes_ctx) 722 { 723 struct crypto_aead *tfm = crypto_aead_reqtfm(req); 724 unsigned long auth_tag_len = crypto_aead_authsize(tfm); 725 const struct aesni_gcm_tfm_s *gcm_tfm = aesni_gcm_tfm; 726 struct gcm_context_data data AESNI_ALIGN_ATTR; 727 struct scatter_walk dst_sg_walk = {}; 728 unsigned long left = req->cryptlen; 729 unsigned long len, srclen, dstlen; 730 struct scatter_walk assoc_sg_walk; 731 struct scatter_walk src_sg_walk; 732 struct scatterlist src_start[2]; 733 struct scatterlist dst_start[2]; 734 struct scatterlist *src_sg; 735 struct scatterlist *dst_sg; 736 u8 *src, *dst, *assoc; 737 u8 *assocmem = NULL; 738 u8 authTag[16]; 739 int i; 740 struct crypto_aes_ctx *ctx; 741 742 if (!enc) 743 left -= auth_tag_len; 744 745 if (left < AVX_GEN4_OPTSIZE && gcm_tfm == &aesni_gcm_tfm_avx_gen4) 746 gcm_tfm = &aesni_gcm_tfm_avx_gen2; 747 if (left < AVX_GEN2_OPTSIZE && gcm_tfm == &aesni_gcm_tfm_avx_gen2) 748 gcm_tfm = &aesni_gcm_tfm_sse; 749 750 /* Linearize assoc, if not already linear */ 751 if (req->src->length >= assoclen && req->src->length && 752 (!PageHighMem(sg_page(req->src)) || 753 req->src->offset + req->src->length <= PAGE_SIZE)) { 754 scatterwalk_start(&assoc_sg_walk, req->src); 755 assoc = scatterwalk_map(&assoc_sg_walk); 756 } else { 757 /* assoc can be any length, so must be on heap */ 758 assocmem = kmalloc(assoclen, GFP_ATOMIC); 759 if (unlikely(!assocmem)) 760 return -ENOMEM; 761 assoc = assocmem; 762 763 scatterwalk_map_and_copy(assoc, req->src, 0, assoclen, 0); 764 } 765 766 if (left) { 767 src_sg = scatterwalk_ffwd(src_start, req->src, req->assoclen); 768 scatterwalk_start(&src_sg_walk, src_sg); 769 if (req->src != req->dst) { 770 dst_sg = scatterwalk_ffwd(dst_start, req->dst, 771 req->assoclen); 772 scatterwalk_start(&dst_sg_walk, dst_sg); 773 } 774 } 775 776 kernel_fpu_begin(); 777 ctx = (struct crypto_aes_ctx*) aes_ctx; 778 memcpy(data.hash_keys , hash_subkey, 16*48); 779 gcm_tfm->init(aes_ctx, &data, iv, 780 hash_subkey, assoc, assoclen); 781 if (req->src != req->dst) { 782 while (left) { 783 src = scatterwalk_map(&src_sg_walk); 784 dst = scatterwalk_map(&dst_sg_walk); 785 srclen = scatterwalk_clamp(&src_sg_walk, left); 786 dstlen = scatterwalk_clamp(&dst_sg_walk, left); 787 len = min(srclen, dstlen); 788 if (len) { 789 if (enc) { 790 gcm_tfm->enc_update(aes_ctx, &data, 791 dst, src, len); 792 } else 793 gcm_tfm->dec_update(aes_ctx, &data, 794 dst, src, len); 795 } 796 left -= len; 797 798 scatterwalk_unmap(src); 799 scatterwalk_unmap(dst); 800 scatterwalk_advance(&src_sg_walk, len); 801 scatterwalk_advance(&dst_sg_walk, len); 802 scatterwalk_done(&src_sg_walk, 0, left); 803 scatterwalk_done(&dst_sg_walk, 1, left); 804 } 805 } else { 806 while (left) { 807 dst = src = scatterwalk_map(&src_sg_walk); 808 len = scatterwalk_clamp(&src_sg_walk, left); 809 if (len) { 810 if (enc) { 811 gcm_tfm->enc_update(aes_ctx, &data, 812 src, src, len); 814 printk("Megha cipher:\n"); 815 for(i=0;i<8;i++) 816 printk("%lx ", *(unsigned long*)(src + (i*8))); 817 printk("\n"); 818 } else { 819 gcm_tfm->dec_update(aes_ctx, &data, 820 src, src, len); 821 printk("Megha plaintext:\n"); 822 for(i=0;i<8;i++) 823 printk("%lx ", *(unsigned long*)(src + (i*8))); 824 printk("\n"); 825 } 826 } 827 left -= len; 828 scatterwalk_unmap(src); 829 scatterwalk_advance(&src_sg_walk, len); 830 scatterwalk_done(&src_sg_walk, 1, left); 831 } 832 } 833 gcm_tfm->finalize(aes_ctx, &data, authTag, auth_tag_len); 834 printk("Megha tag:\n"); 835 for(i=0;i<2;i++) 836 printk("%lx ", *(unsigned long*)(authTag + (i*8))); 837 printk("\n"); 838 kernel_fpu_end(); 839 840 if (!assocmem) 841 scatterwalk_unmap(assoc); 842 else 843 kfree(assocmem); 844 845 if (!enc) { 846 u8 authTagMsg[16]; 847 848 /* Copy out original authTag */ 849 scatterwalk_map_and_copy(authTagMsg, req->src, 850 req->assoclen + req->cryptlen - 851 auth_tag_len, 852 auth_tag_len, 0); 853 854 /* Compare generated tag with passed in tag. */ 855 return crypto_memneq(authTagMsg, authTag, auth_tag_len) ? 856 -EBADMSG : 0; 857 } 858 859 /* Copy in the authTag */ 860 scatterwalk_map_and_copy(authTag, req->dst, 861 req->assoclen + req->cryptlen, 862 auth_tag_len, 1); 863 864 return 0; 865 } 866 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org