Hi Kees, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 467f8165a2b0e6accf3d0dd9c8089b1dbde29f7f commit: d0a3ac549f389c1511a4df0d7638536305205d20 ubsan: enable for all*config builds date: 4 days ago config: powerpc-randconfig-r021-20201219 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project cee1e7d14f4628d6174b33640d502bff3b54ae45) 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 powerpc cross compiling tool for clang build # apt-get install binutils-powerpc-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d0a3ac549f389c1511a4df0d7638536305205d20 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout d0a3ac549f389c1511a4df0d7638536305205d20 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> crypto/blake2b_generic.c:98:13: warning: stack frame size of 9520 bytes in function 'blake2b_compress' [-Wframe-larger-than=] static void blake2b_compress(struct blake2b_state *S, ^ 1 warning generated. -- >> drivers/net/ethernet/intel/e1000/e1000_main.c:3590:6: warning: stack frame size of 1088 bytes in function 'e1000_update_stats' [-Wframe-larger-than=] void e1000_update_stats(struct e1000_adapter *adapter) ^ 1 warning generated. -- >> drivers/net/ethernet/intel/igb/igb_main.c:6551:6: warning: stack frame size of 1408 bytes in function 'igb_update_stats' [-Wframe-larger-than=] void igb_update_stats(struct igb_adapter *adapter) ^ 1 warning generated. -- >> drivers/net/ethernet/intel/igc/igc_main.c:3608:6: warning: stack frame size of 1184 bytes in function 'igc_update_stats' [-Wframe-larger-than=] void igc_update_stats(struct igc_adapter *adapter) ^ 1 warning generated. -- >> drivers/net/ethernet/intel/ixgbe/ixgbe_main.c:7022:6: warning: stack frame size of 1456 bytes in function 'ixgbe_update_stats' [-Wframe-larger-than=] void ixgbe_update_stats(struct ixgbe_adapter *adapter) ^ 1 warning generated. vim +/blake2b_compress +98 crypto/blake2b_generic.c 91d689337fe8b77 David Sterba 2019-10-24 73 91d689337fe8b77 David Sterba 2019-10-24 74 #define G(r,i,a,b,c,d) \ 91d689337fe8b77 David Sterba 2019-10-24 75 do { \ 91d689337fe8b77 David Sterba 2019-10-24 76 a = a + b + m[blake2b_sigma[r][2*i+0]]; \ 91d689337fe8b77 David Sterba 2019-10-24 77 d = ror64(d ^ a, 32); \ 91d689337fe8b77 David Sterba 2019-10-24 78 c = c + d; \ 91d689337fe8b77 David Sterba 2019-10-24 79 b = ror64(b ^ c, 24); \ 91d689337fe8b77 David Sterba 2019-10-24 80 a = a + b + m[blake2b_sigma[r][2*i+1]]; \ 91d689337fe8b77 David Sterba 2019-10-24 81 d = ror64(d ^ a, 16); \ 91d689337fe8b77 David Sterba 2019-10-24 82 c = c + d; \ 91d689337fe8b77 David Sterba 2019-10-24 83 b = ror64(b ^ c, 63); \ 91d689337fe8b77 David Sterba 2019-10-24 84 } while (0) 91d689337fe8b77 David Sterba 2019-10-24 85 91d689337fe8b77 David Sterba 2019-10-24 86 #define ROUND(r) \ 91d689337fe8b77 David Sterba 2019-10-24 87 do { \ 91d689337fe8b77 David Sterba 2019-10-24 88 G(r,0,v[ 0],v[ 4],v[ 8],v[12]); \ 91d689337fe8b77 David Sterba 2019-10-24 89 G(r,1,v[ 1],v[ 5],v[ 9],v[13]); \ 91d689337fe8b77 David Sterba 2019-10-24 90 G(r,2,v[ 2],v[ 6],v[10],v[14]); \ 91d689337fe8b77 David Sterba 2019-10-24 91 G(r,3,v[ 3],v[ 7],v[11],v[15]); \ 91d689337fe8b77 David Sterba 2019-10-24 92 G(r,4,v[ 0],v[ 5],v[10],v[15]); \ 91d689337fe8b77 David Sterba 2019-10-24 93 G(r,5,v[ 1],v[ 6],v[11],v[12]); \ 91d689337fe8b77 David Sterba 2019-10-24 94 G(r,6,v[ 2],v[ 7],v[ 8],v[13]); \ 91d689337fe8b77 David Sterba 2019-10-24 95 G(r,7,v[ 3],v[ 4],v[ 9],v[14]); \ 91d689337fe8b77 David Sterba 2019-10-24 96 } while (0) 91d689337fe8b77 David Sterba 2019-10-24 97 91d689337fe8b77 David Sterba 2019-10-24 @98 static void blake2b_compress(struct blake2b_state *S, 91d689337fe8b77 David Sterba 2019-10-24 99 const u8 block[BLAKE2B_BLOCKBYTES]) 91d689337fe8b77 David Sterba 2019-10-24 100 { 91d689337fe8b77 David Sterba 2019-10-24 101 u64 m[16]; 91d689337fe8b77 David Sterba 2019-10-24 102 u64 v[16]; 91d689337fe8b77 David Sterba 2019-10-24 103 size_t i; 91d689337fe8b77 David Sterba 2019-10-24 104 91d689337fe8b77 David Sterba 2019-10-24 105 for (i = 0; i < 16; ++i) 91d689337fe8b77 David Sterba 2019-10-24 106 m[i] = get_unaligned_le64(block + i * sizeof(m[i])); 91d689337fe8b77 David Sterba 2019-10-24 107 91d689337fe8b77 David Sterba 2019-10-24 108 for (i = 0; i < 8; ++i) 91d689337fe8b77 David Sterba 2019-10-24 109 v[i] = S->h[i]; 91d689337fe8b77 David Sterba 2019-10-24 110 91d689337fe8b77 David Sterba 2019-10-24 111 v[ 8] = blake2b_IV[0]; 91d689337fe8b77 David Sterba 2019-10-24 112 v[ 9] = blake2b_IV[1]; 91d689337fe8b77 David Sterba 2019-10-24 113 v[10] = blake2b_IV[2]; 91d689337fe8b77 David Sterba 2019-10-24 114 v[11] = blake2b_IV[3]; 91d689337fe8b77 David Sterba 2019-10-24 115 v[12] = blake2b_IV[4] ^ S->t[0]; 91d689337fe8b77 David Sterba 2019-10-24 116 v[13] = blake2b_IV[5] ^ S->t[1]; 91d689337fe8b77 David Sterba 2019-10-24 117 v[14] = blake2b_IV[6] ^ S->f[0]; 91d689337fe8b77 David Sterba 2019-10-24 118 v[15] = blake2b_IV[7] ^ S->f[1]; 91d689337fe8b77 David Sterba 2019-10-24 119 91d689337fe8b77 David Sterba 2019-10-24 120 ROUND(0); 91d689337fe8b77 David Sterba 2019-10-24 121 ROUND(1); 91d689337fe8b77 David Sterba 2019-10-24 122 ROUND(2); 91d689337fe8b77 David Sterba 2019-10-24 123 ROUND(3); 91d689337fe8b77 David Sterba 2019-10-24 124 ROUND(4); 91d689337fe8b77 David Sterba 2019-10-24 125 ROUND(5); 91d689337fe8b77 David Sterba 2019-10-24 126 ROUND(6); 91d689337fe8b77 David Sterba 2019-10-24 127 ROUND(7); 91d689337fe8b77 David Sterba 2019-10-24 128 ROUND(8); 91d689337fe8b77 David Sterba 2019-10-24 129 ROUND(9); 91d689337fe8b77 David Sterba 2019-10-24 130 ROUND(10); 91d689337fe8b77 David Sterba 2019-10-24 131 ROUND(11); 0c0408e86dbe8f4 Arnd Bergmann 2020-05-05 132 #ifdef CONFIG_CC_IS_CLANG 0c0408e86dbe8f4 Arnd Bergmann 2020-05-05 133 #pragma nounroll /* https://bugs.llvm.org/show_bug.cgi?id=45803 */ 0c0408e86dbe8f4 Arnd Bergmann 2020-05-05 134 #endif 91d689337fe8b77 David Sterba 2019-10-24 135 for (i = 0; i < 8; ++i) 91d689337fe8b77 David Sterba 2019-10-24 136 S->h[i] = S->h[i] ^ v[i] ^ v[i + 8]; 91d689337fe8b77 David Sterba 2019-10-24 137 } 91d689337fe8b77 David Sterba 2019-10-24 138 :::::: The code at line 98 was first introduced by commit :::::: 91d689337fe8b7703608a2ec39aae700b99f3933 crypto: blake2b - add blake2b generic implementation :::::: TO: David Sterba <dsterba@xxxxxxxx> :::::: CC: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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