* Re: [PATCH] prctl: Add PR_GET_AUXV to copy auxv to userspace
[not found] <b11a591e085f1cd06adb454b1f7cde676d317318.1680585798.git.josh@joshtriplett.org>
@ 2023-04-04 9:58 ` kernel test robot
2023-04-04 12:07 ` Josh Triplett
2023-04-04 10:09 ` kernel test robot
1 sibling, 1 reply; 4+ messages in thread
From: kernel test robot @ 2023-04-04 9:58 UTC (permalink / raw)
To: Josh Triplett, Andrew Morton, linux-kernel
Cc: llvm, oe-kbuild-all, Linux Memory Management List
Hi Josh,
kernel test robot noticed the following build warnings:
[auto build test WARNING on linus/master]
[also build test WARNING on v6.3-rc5]
[cannot apply to akpm-mm/mm-everything next-20230404]
[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/Josh-Triplett/prctl-Add-PR_GET_AUXV-to-copy-auxv-to-userspace/20230404-140043
patch link: https://lore.kernel.org/r/b11a591e085f1cd06adb454b1f7cde676d317318.1680585798.git.josh%40joshtriplett.org
patch subject: [PATCH] prctl: Add PR_GET_AUXV to copy auxv to userspace
config: i386-randconfig-a001-20230403 (https://download.01.org/0day-ci/archive/20230404/202304041715.c3b7aJd4-lkp@intel.com/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
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/intel-lab-lkp/linux/commit/4323f9bd6c2ecbfd6be4f8a3830ea47a89558314
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Josh-Triplett/prctl-Add-PR_GET_AUXV-to-copy-auxv-to-userspace/20230404-140043
git checkout 4323f9bd6c2ecbfd6be4f8a3830ea47a89558314
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202304041715.c3b7aJd4-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> kernel/sys.c:2383:23: warning: comparison of distinct pointer types ('typeof (sizeof (mm->saved_auxv)) *' (aka 'unsigned int *') and 'typeof (len) *' (aka 'unsigned long *')) [-Wcompare-distinct-pointer-types]
unsigned long size = min(sizeof(mm->saved_auxv), len);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:67:19: note: expanded from macro 'min'
#define min(x, y) __careful_cmp(x, y, <)
^~~~~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:36:24: note: expanded from macro '__careful_cmp'
__builtin_choose_expr(__safe_cmp(x, y), \
^~~~~~~~~~~~~~~~
include/linux/minmax.h:26:4: note: expanded from macro '__safe_cmp'
(__typecheck(x, y) && __no_side_effects(x, y))
^~~~~~~~~~~~~~~~~
include/linux/minmax.h:20:28: note: expanded from macro '__typecheck'
(!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~
1 warning generated.
vim +2383 kernel/sys.c
2379
2380 static int prctl_get_auxv(void __user *addr, unsigned long len)
2381 {
2382 struct mm_struct *mm = current->mm;
> 2383 unsigned long size = min(sizeof(mm->saved_auxv), len);
2384
2385 if (size && copy_to_user(addr, mm->saved_auxv, size))
2386 return -EFAULT;
2387 return sizeof(mm->saved_auxv);
2388 }
2389
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [PATCH] prctl: Add PR_GET_AUXV to copy auxv to userspace
2023-04-04 9:58 ` [PATCH] prctl: Add PR_GET_AUXV to copy auxv to userspace kernel test robot
@ 2023-04-04 12:07 ` Josh Triplett
2023-04-04 15:30 ` Nathan Chancellor
0 siblings, 1 reply; 4+ messages in thread
From: Josh Triplett @ 2023-04-04 12:07 UTC (permalink / raw)
To: kernel test robot
Cc: Andrew Morton, linux-kernel, llvm, oe-kbuild-all,
Linux Memory Management List
On Tue, Apr 04, 2023 at 05:58:51PM +0800, kernel test robot wrote:
> reproduce (this is a W=1 build):
Right, I *really* need to start doing W=1 builds. (Am I missing
something, or did kernel builds once emit warnings about type mismatches
on `min` by default?)
> >> kernel/sys.c:2383:23: warning: comparison of distinct pointer types ('typeof (sizeof (mm->saved_auxv)) *' (aka 'unsigned int *') and 'typeof (len) *' (aka 'unsigned long *')) [-Wcompare-distinct-pointer-types]
Will fix in v2.
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [PATCH] prctl: Add PR_GET_AUXV to copy auxv to userspace
2023-04-04 12:07 ` Josh Triplett
@ 2023-04-04 15:30 ` Nathan Chancellor
0 siblings, 0 replies; 4+ messages in thread
From: Nathan Chancellor @ 2023-04-04 15:30 UTC (permalink / raw)
To: Josh Triplett
Cc: kernel test robot, Andrew Morton, linux-kernel, llvm,
oe-kbuild-all, Linux Memory Management List
On Tue, Apr 04, 2023 at 09:07:59PM +0900, Josh Triplett wrote:
> On Tue, Apr 04, 2023 at 05:58:51PM +0800, kernel test robot wrote:
> > reproduce (this is a W=1 build):
>
> Right, I *really* need to start doing W=1 builds. (Am I missing
> something, or did kernel builds once emit warnings about type mismatches
> on `min` by default?)
I see this warning in a normal ARCH=arm allmodconfig build (i.e.,
without W=1). Perhaps you never did a 32-bit build, since that is the
only way this warning would appear?
> > >> kernel/sys.c:2383:23: warning: comparison of distinct pointer types ('typeof (sizeof (mm->saved_auxv)) *' (aka 'unsigned int *') and 'typeof (len) *' (aka 'unsigned long *')) [-Wcompare-distinct-pointer-types]
>
> Will fix in v2.
>
Cheers,
Nathan
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] prctl: Add PR_GET_AUXV to copy auxv to userspace
[not found] <b11a591e085f1cd06adb454b1f7cde676d317318.1680585798.git.josh@joshtriplett.org>
2023-04-04 9:58 ` [PATCH] prctl: Add PR_GET_AUXV to copy auxv to userspace kernel test robot
@ 2023-04-04 10:09 ` kernel test robot
1 sibling, 0 replies; 4+ messages in thread
From: kernel test robot @ 2023-04-04 10:09 UTC (permalink / raw)
To: Josh Triplett, Andrew Morton, linux-kernel
Cc: llvm, oe-kbuild-all, Linux Memory Management List
Hi Josh,
kernel test robot noticed the following build warnings:
[auto build test WARNING on linus/master]
[also build test WARNING on v6.3-rc5]
[cannot apply to akpm-mm/mm-everything next-20230404]
[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/Josh-Triplett/prctl-Add-PR_GET_AUXV-to-copy-auxv-to-userspace/20230404-140043
patch link: https://lore.kernel.org/r/b11a591e085f1cd06adb454b1f7cde676d317318.1680585798.git.josh%40joshtriplett.org
patch subject: [PATCH] prctl: Add PR_GET_AUXV to copy auxv to userspace
config: arm-randconfig-r025-20230403 (https://download.01.org/0day-ci/archive/20230404/202304041710.JYcSAmPL-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 67409911353323ca5edf2049ef0df54132fa1ca7)
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 arm cross compiling tool for clang build
# apt-get install binutils-arm-linux-gnueabi
# https://github.com/intel-lab-lkp/linux/commit/4323f9bd6c2ecbfd6be4f8a3830ea47a89558314
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Josh-Triplett/prctl-Add-PR_GET_AUXV-to-copy-auxv-to-userspace/20230404-140043
git checkout 4323f9bd6c2ecbfd6be4f8a3830ea47a89558314
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202304041710.JYcSAmPL-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> kernel/sys.c:2383:23: warning: comparison of distinct pointer types ('typeof (sizeof (mm->saved_auxv)) *' (aka 'unsigned int *') and 'typeof (len) *' (aka 'unsigned long *')) [-Wcompare-distinct-pointer-types]
unsigned long size = min(sizeof(mm->saved_auxv), len);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:67:19: note: expanded from macro 'min'
#define min(x, y) __careful_cmp(x, y, <)
^~~~~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:36:24: note: expanded from macro '__careful_cmp'
__builtin_choose_expr(__safe_cmp(x, y), \
^~~~~~~~~~~~~~~~
include/linux/minmax.h:26:4: note: expanded from macro '__safe_cmp'
(__typecheck(x, y) && __no_side_effects(x, y))
^~~~~~~~~~~~~~~~~
include/linux/minmax.h:20:28: note: expanded from macro '__typecheck'
(!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~
1 warning generated.
vim +2383 kernel/sys.c
2379
2380 static int prctl_get_auxv(void __user *addr, unsigned long len)
2381 {
2382 struct mm_struct *mm = current->mm;
> 2383 unsigned long size = min(sizeof(mm->saved_auxv), len);
2384
2385 if (size && copy_to_user(addr, mm->saved_auxv, size))
2386 return -EFAULT;
2387 return sizeof(mm->saved_auxv);
2388 }
2389
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests
^ permalink raw reply [flat|nested] 4+ messages in thread