Re: [PATCH v6 6/7] Reimplement RLIMIT_MEMLOCK on top of ucounts

[kernel test robot <lkp@intel.com>]

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Hi Alexey,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on kselftest/next]
[also build test ERROR on linux/master linus/master v5.11 next-20210212]
[cannot apply to hnaz-linux-mm/master]
[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/Alexey-Gladkov/Count-rlimits-in-each-user-namespace/20210215-204524
base:   https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git next
config: openrisc-randconfig-r001-20210215 (attached as .config)
compiler: or1k-linux-gcc (GCC) 9.3.0
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/f009495a8def89a71b9e0b9025a39379d6f9097d
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Alexey-Gladkov/Count-rlimits-in-each-user-namespace/20210215-204524
        git checkout f009495a8def89a71b9e0b9025a39379d6f9097d
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=openrisc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   mm/mmap.c: In function 'ksys_mmap_pgoff':
>> mm/mmap.c:1626:5: error: passing argument 4 of 'hugetlb_file_setup' from incompatible pointer type [-Werror=incompatible-pointer-types]
    1626 |     &cred, HUGETLB_ANONHUGE_INODE,
         |     ^~~~~
         |     |
         |     const struct cred **
   In file included from mm/mmap.c:28:
   include/linux/hugetlb.h:457:17: note: expected 'struct cred **' but argument is of type 'const struct cred **'
     457 |   struct cred **cred, int creat_flags,
         |   ~~~~~~~~~~~~~~^~~~
   cc1: some warnings being treated as errors
--
   mm/memfd.c: In function '__do_sys_memfd_create':
>> mm/memfd.c:301:52: error: passing argument 4 of 'hugetlb_file_setup' from incompatible pointer type [-Werror=incompatible-pointer-types]
     301 |   file = hugetlb_file_setup(name, 0, VM_NORESERVE, &cred,
         |                                                    ^~~~~
         |                                                    |
         |                                                    const struct cred **
   In file included from mm/memfd.c:18:
   include/linux/hugetlb.h:457:17: note: expected 'struct cred **' but argument is of type 'const struct cred **'
     457 |   struct cred **cred, int creat_flags,
         |   ~~~~~~~~~~~~~~^~~~
   cc1: some warnings being treated as errors
--
   ipc/shm.c: In function 'newseg':
>> ipc/shm.c:653:5: error: passing argument 4 of 'hugetlb_file_setup' from incompatible pointer type [-Werror=incompatible-pointer-types]
     653 |     &shp->mlock_cred, HUGETLB_SHMFS_INODE,
         |     ^~~~~~~~~~~~~~~~
         |     |
         |     const struct cred **
   In file included from ipc/shm.c:30:
   include/linux/hugetlb.h:457:17: note: expected 'struct cred **' but argument is of type 'const struct cred **'
     457 |   struct cred **cred, int creat_flags,
         |   ~~~~~~~~~~~~~~^~~~
   cc1: some warnings being treated as errors


vim +/hugetlb_file_setup +1626 mm/mmap.c

  1590	
  1591	unsigned long ksys_mmap_pgoff(unsigned long addr, unsigned long len,
  1592				      unsigned long prot, unsigned long flags,
  1593				      unsigned long fd, unsigned long pgoff)
  1594	{
  1595		struct file *file = NULL;
  1596		unsigned long retval;
  1597	
  1598		if (!(flags & MAP_ANONYMOUS)) {
  1599			audit_mmap_fd(fd, flags);
  1600			file = fget(fd);
  1601			if (!file)
  1602				return -EBADF;
  1603			if (is_file_hugepages(file)) {
  1604				len = ALIGN(len, huge_page_size(hstate_file(file)));
  1605			} else if (unlikely(flags & MAP_HUGETLB)) {
  1606				retval = -EINVAL;
  1607				goto out_fput;
  1608			}
  1609		} else if (flags & MAP_HUGETLB) {
  1610			const struct cred *cred;
  1611			struct hstate *hs;
  1612	
  1613			hs = hstate_sizelog((flags >> MAP_HUGE_SHIFT) & MAP_HUGE_MASK);
  1614			if (!hs)
  1615				return -EINVAL;
  1616	
  1617			len = ALIGN(len, huge_page_size(hs));
  1618			/*
  1619			 * VM_NORESERVE is used because the reservations will be
  1620			 * taken when vm_ops->mmap() is called
  1621			 * A dummy user value is used because we are not locking
  1622			 * memory so no accounting is necessary
  1623			 */
  1624			file = hugetlb_file_setup(HUGETLB_ANON_FILE, len,
  1625					VM_NORESERVE,
> 1626					&cred, HUGETLB_ANONHUGE_INODE,
  1627					(flags >> MAP_HUGE_SHIFT) & MAP_HUGE_MASK);
  1628			if (IS_ERR(file))
  1629				return PTR_ERR(file);
  1630		}
  1631	
  1632		flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
  1633	
  1634		retval = vm_mmap_pgoff(file, addr, len, prot, flags, pgoff);
  1635	out_fput:
  1636		if (file)
  1637			fput(file);
  1638		return retval;
  1639	}
  1640	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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