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Date: Wed, 23 Feb 2022 20:47:53 +0800
From: kernel test robot <lkp@...el.com>
To: Liam Howlett <liam.howlett@...cle.com>,
"broonie@...nel.org" <broonie@...nel.org>
Cc: kbuild-all@...ts.01.org,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Linux Next Mailing List <linux-next@...r.kernel.org>,
Catalin Marinas <catalin.marinas@....com>,
Will Deacon <will@...nel.org>
Subject: Re: [PATCH] arm64: Change elfcore for_each_mte_vma() to use VMA
iterator
Hi Liam,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on arm64/for-next/core]
[also build test ERROR on next-20220222]
[cannot apply to linux/master linus/master v5.17-rc5]
[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]
url: https://github.com/0day-ci/linux/commits/Liam-Howlett/arm64-Change-elfcore-for_each_mte_vma-to-use-VMA-iterator/20220223-104149
base: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core
config: arm64-randconfig-r033-20220221 (https://download.01.org/0day-ci/archive/20220223/202202231935.aUY0YIgf-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 11.2.0
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
# https://github.com/0day-ci/linux/commit/e416e64fe4e04c43daa48131e564c9f2f64ec333
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Liam-Howlett/arm64-Change-elfcore-for_each_mte_vma-to-use-VMA-iterator/20220223-104149
git checkout e416e64fe4e04c43daa48131e564c9f2f64ec333
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arm64 SHELL=/bin/bash
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
All errors (new ones prefixed by >>):
arch/arm64/kernel/elfcore.c: In function 'elf_core_extra_phdrs':
arch/arm64/kernel/elfcore.c:68:9: error: implicit declaration of function 'VMA_ITERATOR' [-Werror=implicit-function-declaration]
68 | VMA_ITERATOR(vmi, current->mm, 0);
| ^~~~~~~~~~~~
arch/arm64/kernel/elfcore.c:68:22: error: 'vmi' undeclared (first use in this function); did you mean 'vma'?
68 | VMA_ITERATOR(vmi, current->mm, 0);
| ^~~
| vma
arch/arm64/kernel/elfcore.c:68:22: note: each undeclared identifier is reported only once for each function it appears in
arch/arm64/kernel/elfcore.c:13:17: error: implicit declaration of function 'for_each_vma'; did you mean 'for_each_cpu'? [-Werror=implicit-function-declaration]
13 | for_each_vma(vmi, vma) \
| ^~~~~~~~~~~~
arch/arm64/kernel/elfcore.c:70:9: note: in expansion of macro 'for_each_mte_vma'
70 | for_each_mte_vma(vmi, vma)
| ^~~~~~~~~~~~~~~~
>> arch/arm64/kernel/elfcore.c:14:25: error: expected ';' before 'if'
14 | if (vma->vm_flags & VM_MTE)
| ^~
arch/arm64/kernel/elfcore.c:70:9: note: in expansion of macro 'for_each_mte_vma'
70 | for_each_mte_vma(vmi, vma)
| ^~~~~~~~~~~~~~~~
arch/arm64/kernel/elfcore.c: In function 'elf_core_write_extra_phdrs':
arch/arm64/kernel/elfcore.c:79:22: error: 'vmi' undeclared (first use in this function); did you mean 'vma'?
79 | VMA_ITERATOR(vmi, current->mm, 0);
| ^~~
| vma
>> arch/arm64/kernel/elfcore.c:14:25: error: expected ';' before 'if'
14 | if (vma->vm_flags & VM_MTE)
| ^~
arch/arm64/kernel/elfcore.c:81:9: note: in expansion of macro 'for_each_mte_vma'
81 | for_each_mte_vma(vmi, vma) {
| ^~~~~~~~~~~~~~~~
arch/arm64/kernel/elfcore.c: In function 'elf_core_extra_data_size':
arch/arm64/kernel/elfcore.c:105:22: error: 'vmi' undeclared (first use in this function); did you mean 'vma'?
105 | VMA_ITERATOR(vmi, current->mm, 0);
| ^~~
| vma
>> arch/arm64/kernel/elfcore.c:14:25: error: expected ';' before 'if'
14 | if (vma->vm_flags & VM_MTE)
| ^~
arch/arm64/kernel/elfcore.c:107:9: note: in expansion of macro 'for_each_mte_vma'
107 | for_each_mte_vma(vmi, vma)
| ^~~~~~~~~~~~~~~~
arch/arm64/kernel/elfcore.c: In function 'elf_core_write_extra_data':
arch/arm64/kernel/elfcore.c:116:22: error: 'vmi' undeclared (first use in this function); did you mean 'vma'?
116 | VMA_ITERATOR(vmi, current->mm, 0);
| ^~~
| vma
>> arch/arm64/kernel/elfcore.c:14:25: error: expected ';' before 'if'
14 | if (vma->vm_flags & VM_MTE)
| ^~
arch/arm64/kernel/elfcore.c:118:9: note: in expansion of macro 'for_each_mte_vma'
118 | for_each_mte_vma(vmi, vma) {
| ^~~~~~~~~~~~~~~~
arch/arm64/kernel/elfcore.c: In function 'elf_core_write_extra_phdrs':
arch/arm64/kernel/elfcore.c:99:1: error: control reaches end of non-void function [-Werror=return-type]
99 | }
| ^
arch/arm64/kernel/elfcore.c: In function 'elf_core_write_extra_data':
arch/arm64/kernel/elfcore.c:127:1: error: control reaches end of non-void function [-Werror=return-type]
127 | }
| ^
At top level:
arch/arm64/kernel/elfcore.c:25:12: warning: 'mte_dump_tag_range' defined but not used [-Wunused-function]
25 | static int mte_dump_tag_range(struct coredump_params *cprm,
| ^~~~~~~~~~~~~~~~~~
arch/arm64/kernel/elfcore.c:16:22: warning: 'mte_vma_tag_dump_size' defined but not used [-Wunused-function]
16 | static unsigned long mte_vma_tag_dump_size(struct vm_area_struct *vma)
| ^~~~~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
vim +14 arch/arm64/kernel/elfcore.c
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 10
e416e64fe4e04c Liam Howlett 2022-02-23 11 #define for_each_mte_vma(vmi, vma) \
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 12 if (system_supports_mte()) \
e416e64fe4e04c Liam Howlett 2022-02-23 13 for_each_vma(vmi, vma) \
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 @14 if (vma->vm_flags & VM_MTE)
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 15
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 16 static unsigned long mte_vma_tag_dump_size(struct vm_area_struct *vma)
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 17 {
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 18 if (vma->vm_flags & VM_DONTDUMP)
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 19 return 0;
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 20
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 21 return vma_pages(vma) * MTE_PAGE_TAG_STORAGE;
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 22 }
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 23
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 24 /* Derived from dump_user_range(); start/end must be page-aligned */
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 25 static int mte_dump_tag_range(struct coredump_params *cprm,
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 26 unsigned long start, unsigned long end)
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 27 {
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 28 unsigned long addr;
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 29
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 30 for (addr = start; addr < end; addr += PAGE_SIZE) {
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 31 char tags[MTE_PAGE_TAG_STORAGE];
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 32 struct page *page = get_dump_page(addr);
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 33
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 34 /*
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 35 * get_dump_page() returns NULL when encountering an empty
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 36 * page table entry that would otherwise have been filled with
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 37 * the zero page. Skip the equivalent tag dump which would
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 38 * have been all zeros.
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 39 */
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 40 if (!page) {
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 41 dump_skip(cprm, MTE_PAGE_TAG_STORAGE);
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 42 continue;
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 43 }
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 44
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 45 /*
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 46 * Pages mapped in user space as !pte_access_permitted() (e.g.
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 47 * PROT_EXEC only) may not have the PG_mte_tagged flag set.
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 48 */
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 49 if (!test_bit(PG_mte_tagged, &page->flags)) {
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 50 put_page(page);
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 51 dump_skip(cprm, MTE_PAGE_TAG_STORAGE);
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 52 continue;
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 53 }
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 54
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 55 mte_save_page_tags(page_address(page), tags);
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 56 put_page(page);
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 57 if (!dump_emit(cprm, tags, MTE_PAGE_TAG_STORAGE))
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 58 return 0;
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 59 }
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 60
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 61 return 1;
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 62 }
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 63
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 64 Elf_Half elf_core_extra_phdrs(void)
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 65 {
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 66 struct vm_area_struct *vma;
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 67 int vma_count = 0;
e416e64fe4e04c Liam Howlett 2022-02-23 @68 VMA_ITERATOR(vmi, current->mm, 0);
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 69
e416e64fe4e04c Liam Howlett 2022-02-23 70 for_each_mte_vma(vmi, vma)
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 71 vma_count++;
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 72
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 73 return vma_count;
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 74 }
6dd8b1a0b6cb3e Catalin Marinas 2022-01-31 75
---
0-DAY CI Kernel Test Service, Intel Corporation
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