Hi Christophe, kernel test robot noticed the following build warnings:
[auto build test WARNING on powerpc/next] [also build test WARNING on powerpc/fixes masahiroy-kbuild/for-next masahiroy-kbuild/fixes linus/master v6.4-rc7] [cannot apply to next-20230622] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Christophe-Leroy/powerpc-kuap-Avoid-unnecessary-reads-of-MD_AP/20230622-185950 base: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next patch link: https://lore.kernel.org/r/be282f27ad808418c7475b51a00b4cb035f89a95.1687430631.git.christophe.leroy%40csgroup.eu patch subject: [PATCH v2 14/14] powerpc: Implement UACCESS validation on PPC32 config: powerpc-randconfig-r025-20230622 (https://download.01.org/0day-ci/archive/20230623/202306230353.ipqv57lk-...@intel.com/config) compiler: powerpc-linux-gcc (GCC) 12.3.0 reproduce: (https://download.01.org/0day-ci/archive/20230623/202306230353.ipqv57lk-...@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <l...@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202306230353.ipqv57lk-...@intel.com/ All warnings (new ones prefixed by >>): lib/ubsan.c:307:6: warning: no previous prototype for '__ubsan_handle_type_mismatch' [-Wmissing-prototypes] 307 | void __ubsan_handle_type_mismatch(struct type_mismatch_data *data, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ >> lib/ubsan.o: warning: objtool: ubsan_type_mismatch_common+0x24: UACCESS-safe >> disables UACCESS lib/ubsan.o: warning: objtool: __ubsan_handle_type_mismatch+0x54: call to _restgpr_30_x() with UACCESS enabled lib/ubsan.o: warning: objtool: __ubsan_handle_type_mismatch_v1+0x5c: call to _restgpr_30_x() with UACCESS enabled lib/ubsan.o: warning: objtool: __ubsan_handle_load_invalid_value+0x28: call to memset() with UACCESS enabled lib/ubsan.o: warning: objtool: __ubsan_handle_shift_out_of_bounds+0x34: call to memset() with UACCESS enabled -- >> arch/powerpc/kernel/ptrace/ptrace-view.o: warning: objtool: >> gpr32_set_common+0x2b8: redundant UACCESS disable objdump-func vmlinux.o ubsan_type_mismatch_common: 0000 00000000 <ubsan_type_mismatch_common>: 0000 0: 94 21 ff e0 stwu r1,-32(r1) 0004 4: 7c 08 02 a6 mflr r0 0008 8: bf 61 00 0c stmw r27,12(r1) 000c c: 7c 7f 1b 78 mr r31,r3 0010 10: 90 01 00 24 stw r0,36(r1) 0014 14: 7c 9e 23 78 mr r30,r4 0018 18: 48 00 00 01 bl 18 <ubsan_type_mismatch_common+0x18> 18: R_PPC_REL24 __sanitizer_cov_trace_pc 001c 1c: 7f 90 0a a6 mfpid r28 0020 20: 39 20 00 00 li r9,0 0024 24: 7d 30 0b a6 mtpid r9 0028 28: 4c 00 01 2c isync 002c 2c: 2c 1e 00 00 cmpwi r30,0 0030 30: 40 e2 00 58 bne+ 88 <ubsan_type_mismatch_common+0x88> 0034 34: 48 00 00 01 bl 34 <ubsan_type_mismatch_common+0x34> 34: R_PPC_REL24 __sanitizer_cov_trace_pc 0038 38: 80 7f 00 00 lwz r3,0(r31) 003c 3c: 48 00 00 01 bl 3c <ubsan_type_mismatch_common+0x3c> 3c: R_PPC_REL24 .text.suppress_report 0040 40: 2c 03 00 00 cmpwi r3,0 0044 44: 40 e2 01 30 bne+ 174 <ubsan_type_mismatch_common+0x174> 0048 48: 48 00 00 01 bl 48 <ubsan_type_mismatch_common+0x48> 48: R_PPC_REL24 __sanitizer_cov_trace_pc 004c 4c: 80 7f 00 00 lwz r3,0(r31) 0050 50: 3c 80 00 00 lis r4,0 52: R_PPC_ADDR16_HA .rodata.ubsan_type_mismatch_common.str1.1 0054 54: 38 84 00 00 addi r4,r4,0 56: R_PPC_ADDR16_LO .rodata.ubsan_type_mismatch_common.str1.1 0058 58: 48 00 00 01 bl 58 <ubsan_type_mismatch_common+0x58> 58: R_PPC_REL24 .text.unlikely.ubsan_prologue 005c 5c: 89 3f 00 0c lbz r9,12(r31) 0060 60: 3d 40 00 00 lis r10,0 62: R_PPC_ADDR16_HA .rodata.type_check_kinds 0064 64: 80 bf 00 04 lwz r5,4(r31) 0068 68: 39 4a 00 00 addi r10,r10,0 6a: R_PPC_ADDR16_LO .rodata.type_check_kinds 006c 6c: 55 29 10 3a slwi r9,r9,2 0070 70: 7c 8a 48 2e lwzx r4,r10,r9 0074 74: 3c 60 00 00 lis r3,0 76: R_PPC_ADDR16_HA .rodata.ubsan_type_mismatch_common.str1.1+0xf 0078 78: 38 a5 00 04 addi r5,r5,4 007c 7c: 38 63 00 00 addi r3,r3,0 7e: R_PPC_ADDR16_LO .rodata.ubsan_type_mismatch_common.str1.1+0xf 0080 80: 48 00 00 01 bl 80 <ubsan_type_mismatch_common+0x80> 80: R_PPC_REL24 _printk 0084 84: 48 00 00 ec b 170 <ubsan_type_mismatch_common+0x170> 0088 88: 48 00 00 01 bl 88 <ubsan_type_mismatch_common+0x88> 88: R_PPC_REL24 __sanitizer_cov_trace_pc 008c 8c: 83 bf 00 08 lwz r29,8(r31) 0090 90: 83 7f 00 00 lwz r27,0(r31) 0094 94: 2c 1d 00 00 cmpwi r29,0 0098 98: 41 c2 00 78 beq- 110 <ubsan_type_mismatch_common+0x110> 009c 9c: 3b bd ff ff addi r29,r29,-1 00a0 a0: 48 00 00 01 bl a0 <ubsan_type_mismatch_common+0xa0> a0: R_PPC_REL24 __sanitizer_cov_trace_pc 00a4 a4: 7f bd f0 39 and. r29,r29,r30 00a8 a8: 41 e2 00 68 beq+ 110 <ubsan_type_mismatch_common+0x110> 00ac ac: 48 00 00 01 bl ac <ubsan_type_mismatch_common+0xac> ac: R_PPC_REL24 __sanitizer_cov_trace_pc 00b0 b0: 7f 63 db 78 mr r3,r27 00b4 b4: 48 00 00 01 bl b4 <ubsan_type_mismatch_common+0xb4> b4: R_PPC_REL24 .text.suppress_report 00b8 b8: 2c 03 00 00 cmpwi r3,0 00bc bc: 40 e2 00 b8 bne+ 174 <ubsan_type_mismatch_common+0x174> 00c0 c0: 48 00 00 01 bl c0 <ubsan_type_mismatch_common+0xc0> c0: R_PPC_REL24 __sanitizer_cov_trace_pc 00c4 c4: 80 7f 00 00 lwz r3,0(r31) 00c8 c8: 3c 80 00 00 lis r4,0 ca: R_PPC_ADDR16_HA .rodata.ubsan_type_mismatch_common.str1.1+0x2d 00cc cc: 38 84 00 00 addi r4,r4,0 ce: R_PPC_ADDR16_LO .rodata.ubsan_type_mismatch_common.str1.1+0x2d 00d0 d0: 48 00 00 01 bl d0 <ubsan_type_mismatch_common+0xd0> d0: R_PPC_REL24 .text.unlikely.ubsan_prologue 00d4 d4: 89 3f 00 0c lbz r9,12(r31) 00d8 d8: 3d 40 00 00 lis r10,0 da: R_PPC_ADDR16_HA .rodata.type_check_kinds 00dc dc: 80 df 00 04 lwz r6,4(r31) 00e0 e0: 39 4a 00 00 addi r10,r10,0 e2: R_PPC_ADDR16_LO .rodata.type_check_kinds 00e4 e4: 55 29 10 3a slwi r9,r9,2 00e8 e8: 7c 8a 48 2e lwzx r4,r10,r9 00ec ec: 3c 60 00 00 lis r3,0 ee: R_PPC_ADDR16_HA .rodata.ubsan_type_mismatch_common.str1.1+0x3f 00f0 f0: 38 c6 00 04 addi r6,r6,4 00f4 f4: 7f c5 f3 78 mr r5,r30 00f8 f8: 38 63 00 00 addi r3,r3,0 fa: R_PPC_ADDR16_LO .rodata.ubsan_type_mismatch_common.str1.1+0x3f 00fc fc: 48 00 00 01 bl fc <ubsan_type_mismatch_common+0xfc> fc: R_PPC_REL24 _printk 0100 100: 3c 60 00 00 lis r3,0 102: R_PPC_ADDR16_HA .rodata.ubsan_type_mismatch_common.str1.1+0x67 0104 104: 80 9f 00 08 lwz r4,8(r31) 0108 108: 38 63 00 00 addi r3,r3,0 10a: R_PPC_ADDR16_LO .rodata.ubsan_type_mismatch_common.str1.1+0x67 010c 10c: 48 00 00 60 b 16c <ubsan_type_mismatch_common+0x16c> 0110 110: 48 00 00 01 bl 110 <ubsan_type_mismatch_common+0x110> 110: R_PPC_REL24 __sanitizer_cov_trace_pc 0114 114: 7f 63 db 78 mr r3,r27 0118 118: 48 00 00 01 bl 118 <ubsan_type_mismatch_common+0x118> 118: R_PPC_REL24 .text.suppress_report 011c 11c: 2c 03 00 00 cmpwi r3,0 0120 120: 40 e2 00 54 bne+ 174 <ubsan_type_mismatch_common+0x174> 0124 124: 48 00 00 01 bl 124 <ubsan_type_mismatch_common+0x124> 124: R_PPC_REL24 __sanitizer_cov_trace_pc 0128 128: 80 7f 00 00 lwz r3,0(r31) 012c 12c: 3c 80 00 00 lis r4,0 12e: R_PPC_ADDR16_HA .rodata.ubsan_type_mismatch_common.str1.1+0x8c 0130 130: 38 84 00 00 addi r4,r4,0 132: R_PPC_ADDR16_LO .rodata.ubsan_type_mismatch_common.str1.1+0x8c 0134 134: 48 00 00 01 bl 134 <ubsan_type_mismatch_common+0x134> 134: R_PPC_REL24 .text.unlikely.ubsan_prologue 0138 138: 89 3f 00 0c lbz r9,12(r31) 013c 13c: 3d 40 00 00 lis r10,0 13e: R_PPC_ADDR16_HA .rodata.type_check_kinds 0140 140: 39 4a 00 00 addi r10,r10,0 142: R_PPC_ADDR16_LO .rodata.type_check_kinds 0144 144: 55 29 10 3a slwi r9,r9,2 0148 148: 3c 60 00 00 lis r3,0 14a: R_PPC_ADDR16_HA .rodata.ubsan_type_mismatch_common.str1.1+0xa1 014c 14c: 7c 8a 48 2e lwzx r4,r10,r9 0150 150: 7f c5 f3 78 mr r5,r30 0154 154: 38 63 00 00 addi r3,r3,0 156: R_PPC_ADDR16_LO .rodata.ubsan_type_mismatch_common.str1.1+0xa1 0158 158: 48 00 00 01 bl 158 <ubsan_type_mismatch_common+0x158> 158: R_PPC_REL24 _printk 015c 15c: 80 9f 00 04 lwz r4,4(r31) 0160 160: 3c 60 00 00 lis r3,0 162: R_PPC_ADDR16_HA .rodata.ubsan_type_mismatch_common.str1.1+0xca 0164 164: 38 63 00 00 addi r3,r3,0 166: R_PPC_ADDR16_LO .rodata.ubsan_type_mismatch_common.str1.1+0xca 0168 168: 38 84 00 04 addi r4,r4,4 016c 16c: 48 00 00 01 bl 16c <ubsan_type_mismatch_common+0x16c> 16c: R_PPC_REL24 _printk 0170 170: 48 00 00 01 bl 170 <ubsan_type_mismatch_common+0x170> 170: R_PPC_REL24 .text.unlikely.ubsan_epilogue 0174 174: 48 00 00 01 bl 174 <ubsan_type_mismatch_common+0x174> 174: R_PPC_REL24 __sanitizer_cov_trace_pc 0178 178: 2c 1c 00 00 cmpwi r28,0 017c 17c: 41 e2 00 14 beq+ 190 <ubsan_type_mismatch_common+0x190> 0180 180: 48 00 00 01 bl 180 <ubsan_type_mismatch_common+0x180> 180: R_PPC_REL24 __sanitizer_cov_trace_pc 0184 184: 81 22 0e b4 lwz r9,3764(r2) 0188 188: 7d 30 0b a6 mtpid r9 018c 18c: 4c 00 01 2c isync 0190 190: 80 01 00 24 lwz r0,36(r1) 0194 194: 83 61 00 0c lwz r27,12(r1) 0198 198: 83 81 00 10 lwz r28,16(r1) 019c 19c: 83 a1 00 14 lwz r29,20(r1) 01a0 1a0: 7c 08 03 a6 mtlr r0 01a4 1a4: 83 c1 00 18 lwz r30,24(r1) 01a8 1a8: 83 e1 00 1c lwz r31,28(r1) 01ac 1ac: 38 21 00 20 addi r1,r1,32 01b0 1b0: 48 00 00 00 b 1b0 <ubsan_type_mismatch_common+0x1b0> 1b0: R_PPC_REL24 __sanitizer_cov_trace_pc -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
