Re: [PATCH v18 2/5] fs/proc/task_mmu: Implement IOCTL to get and optionally clear info about PTEs
From: kernel test robot
Date: Tue Jun 13 2023 - 12:13:35 EST
Hi Muhammad,
kernel test robot noticed the following build warnings:
[auto build test WARNING on akpm-mm/mm-everything]
[also build test WARNING on next-20230613]
[cannot apply to linus/master v6.4-rc6]
[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/Muhammad-Usama-Anjum/userfaultfd-UFFD_FEATURE_WP_ASYNC/20230613-183334
base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link: https://lore.kernel.org/r/20230613102905.2808371-3-usama.anjum%40collabora.com
patch subject: [PATCH v18 2/5] fs/proc/task_mmu: Implement IOCTL to get and optionally clear info about PTEs
config: hexagon-randconfig-r041-20230612 (https://download.01.org/0day-ci/archive/20230613/202306132324.Npiix2ct-lkp@xxxxxxxxx/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce (this is a W=1 build):
mkdir -p ~/bin
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
git remote add akpm-mm https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git
git fetch akpm-mm mm-everything
git checkout akpm-mm/mm-everything
b4 shazam https://lore.kernel.org/r/20230613102905.2808371-3-usama.anjum@xxxxxxxxxxxxx
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=hexagon olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash fs/proc/
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 <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202306132324.Npiix2ct-lkp@xxxxxxxxx/
All warnings (new ones prefixed by >>):
In file included from fs/proc/task_mmu.c:3:
In file included from include/linux/mm_inline.h:7:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:13:
In file included from include/linux/cgroup.h:26:
In file included from include/linux/kernel_stat.h:9:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/hexagon/include/asm/io.h:334:
include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
547 | val = __raw_readb(PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
560 | val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
| ~~~~~~~~~~ ^
include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
37 | #define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
| ^
In file included from fs/proc/task_mmu.c:3:
In file included from include/linux/mm_inline.h:7:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:13:
In file included from include/linux/cgroup.h:26:
In file included from include/linux/kernel_stat.h:9:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/hexagon/include/asm/io.h:334:
include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
573 | val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
| ~~~~~~~~~~ ^
include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
| ^
In file included from fs/proc/task_mmu.c:3:
In file included from include/linux/mm_inline.h:7:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:13:
In file included from include/linux/cgroup.h:26:
In file included from include/linux/kernel_stat.h:9:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/hexagon/include/asm/io.h:334:
include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
584 | __raw_writeb(value, PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
594 | __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
604 | __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
>> fs/proc/task_mmu.c:1866:18: warning: shift count >= width of type [-Wshift-count-overflow]
1866 | if ((p->flags & PM_SCAN_OP_WRITE) && (!userfaultfd_wp_async(vma) ||
| ^~~~~~~~~~~~~~~~
fs/proc/task_mmu.c:1769:26: note: expanded from macro 'PM_SCAN_OP_WRITE'
1769 | #define PM_SCAN_OP_WRITE BIT(63)
| ^~~~~~~
include/vdso/bits.h:7:26: note: expanded from macro 'BIT'
7 | #define BIT(nr) (UL(1) << (nr))
| ^ ~~~~
fs/proc/task_mmu.c:2102:22: warning: shift count >= width of type [-Wshift-count-overflow]
2102 | PAGE_IS_WRITTEN) ? PM_SCAN_OP_WRITE : 0;
| ^~~~~~~~~~~~~~~~
fs/proc/task_mmu.c:1769:26: note: expanded from macro 'PM_SCAN_OP_WRITE'
1769 | #define PM_SCAN_OP_WRITE BIT(63)
| ^~~~~~~
include/vdso/bits.h:7:26: note: expanded from macro 'BIT'
7 | #define BIT(nr) (UL(1) << (nr))
| ^ ~~~~
8 warnings generated.
vim +1866 fs/proc/task_mmu.c
1859
1860 static int pagemap_scan_test_walk(unsigned long start, unsigned long end,
1861 struct mm_walk *walk)
1862 {
1863 struct pagemap_scan_private *p = walk->private;
1864 struct vm_area_struct *vma = walk->vma;
1865
> 1866 if ((p->flags & PM_SCAN_OP_WRITE) && (!userfaultfd_wp_async(vma) ||
1867 !userfaultfd_wp_use_markers(vma)))
1868 return -EPERM;
1869
1870 if (vma->vm_flags & VM_PFNMAP)
1871 return 1;
1872
1873 return 0;
1874 }
1875
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki