* Re: [PATCH] ubsan: Implement __ubsan_handle_alignment_assumption
[not found] <20210112205542.1375847-1-natechancellor@gmail.com>
@ 2021-01-13 0:18 ` kernel test robot
2021-01-13 0:39 ` kernel test robot
1 sibling, 0 replies; 5+ messages in thread
From: kernel test robot @ 2021-01-13 0:18 UTC (permalink / raw)
To: Nathan Chancellor, Kees Cook, Andrew Morton
Cc: kbuild-all, Linux Memory Management List, Nick Desaulniers,
linux-kernel, clang-built-linux, Nathan Chancellor
[-- Attachment #1: Type: text/plain, Size: 6745 bytes --]
Hi Nathan,
I love your patch! Perhaps something to improve:
[auto build test WARNING on 7c53f6b671f4aba70ff15e1b05148b10d58c2837]
url: https://github.com/0day-ci/linux/commits/Nathan-Chancellor/ubsan-Implement-__ubsan_handle_alignment_assumption/20210113-055714
base: 7c53f6b671f4aba70ff15e1b05148b10d58c2837
config: m68k-allmodconfig (attached as .config)
compiler: m68k-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/775adad26a60878926c0ee6cd460a1375bbe51e6
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Nathan-Chancellor/ubsan-Implement-__ubsan_handle_alignment_assumption/20210113-055714
git checkout 775adad26a60878926c0ee6cd460a1375bbe51e6
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=m68k
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
lib/ubsan.c:192:6: warning: no previous prototype for '__ubsan_handle_add_overflow' [-Wmissing-prototypes]
192 | void __ubsan_handle_add_overflow(void *data,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
lib/ubsan.c:200:6: warning: no previous prototype for '__ubsan_handle_sub_overflow' [-Wmissing-prototypes]
200 | void __ubsan_handle_sub_overflow(void *data,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
lib/ubsan.c:207:6: warning: no previous prototype for '__ubsan_handle_mul_overflow' [-Wmissing-prototypes]
207 | void __ubsan_handle_mul_overflow(void *data,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
lib/ubsan.c:214:6: warning: no previous prototype for '__ubsan_handle_negate_overflow' [-Wmissing-prototypes]
214 | void __ubsan_handle_negate_overflow(void *_data, void *old_val)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
lib/ubsan.c:234:6: warning: no previous prototype for '__ubsan_handle_divrem_overflow' [-Wmissing-prototypes]
234 | void __ubsan_handle_divrem_overflow(void *_data, void *lhs, void *rhs)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
lib/ubsan.c:315:6: warning: no previous prototype for '__ubsan_handle_type_mismatch' [-Wmissing-prototypes]
315 | void __ubsan_handle_type_mismatch(struct type_mismatch_data *data,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
lib/ubsan.c:329:6: warning: no previous prototype for '__ubsan_handle_type_mismatch_v1' [-Wmissing-prototypes]
329 | void __ubsan_handle_type_mismatch_v1(void *_data, void *ptr)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
lib/ubsan.c:343:6: warning: no previous prototype for '__ubsan_handle_out_of_bounds' [-Wmissing-prototypes]
343 | void __ubsan_handle_out_of_bounds(void *_data, void *index)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
lib/ubsan.c:360:6: warning: no previous prototype for '__ubsan_handle_shift_out_of_bounds' [-Wmissing-prototypes]
360 | void __ubsan_handle_shift_out_of_bounds(void *_data, void *lhs, void *rhs)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
lib/ubsan.c:402:6: warning: no previous prototype for '__ubsan_handle_builtin_unreachable' [-Wmissing-prototypes]
402 | void __ubsan_handle_builtin_unreachable(void *_data)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
lib/ubsan.c:412:6: warning: no previous prototype for '__ubsan_handle_load_invalid_value' [-Wmissing-prototypes]
412 | void __ubsan_handle_load_invalid_value(void *_data, void *val)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> lib/ubsan.c:431:6: warning: no previous prototype for '__ubsan_handle_alignment_assumption' [-Wmissing-prototypes]
431 | void __ubsan_handle_alignment_assumption(void *_data, unsigned long ptr,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
vim +/__ubsan_handle_alignment_assumption +431 lib/ubsan.c
359
> 360 void __ubsan_handle_shift_out_of_bounds(void *_data, void *lhs, void *rhs)
361 {
362 struct shift_out_of_bounds_data *data = _data;
363 struct type_descriptor *rhs_type = data->rhs_type;
364 struct type_descriptor *lhs_type = data->lhs_type;
365 char rhs_str[VALUE_LENGTH];
366 char lhs_str[VALUE_LENGTH];
367 unsigned long ua_flags = user_access_save();
368
369 if (suppress_report(&data->location))
370 goto out;
371
372 ubsan_prologue(&data->location, "shift-out-of-bounds");
373
374 val_to_string(rhs_str, sizeof(rhs_str), rhs_type, rhs);
375 val_to_string(lhs_str, sizeof(lhs_str), lhs_type, lhs);
376
377 if (val_is_negative(rhs_type, rhs))
378 pr_err("shift exponent %s is negative\n", rhs_str);
379
380 else if (get_unsigned_val(rhs_type, rhs) >=
381 type_bit_width(lhs_type))
382 pr_err("shift exponent %s is too large for %u-bit type %s\n",
383 rhs_str,
384 type_bit_width(lhs_type),
385 lhs_type->type_name);
386 else if (val_is_negative(lhs_type, lhs))
387 pr_err("left shift of negative value %s\n",
388 lhs_str);
389 else
390 pr_err("left shift of %s by %s places cannot be"
391 " represented in type %s\n",
392 lhs_str, rhs_str,
393 lhs_type->type_name);
394
395 ubsan_epilogue();
396 out:
397 user_access_restore(ua_flags);
398 }
399 EXPORT_SYMBOL(__ubsan_handle_shift_out_of_bounds);
400
401
402 void __ubsan_handle_builtin_unreachable(void *_data)
403 {
404 struct unreachable_data *data = _data;
405 ubsan_prologue(&data->location, "unreachable");
406 pr_err("calling __builtin_unreachable()\n");
407 ubsan_epilogue();
408 panic("can't return from __builtin_unreachable()");
409 }
410 EXPORT_SYMBOL(__ubsan_handle_builtin_unreachable);
411
412 void __ubsan_handle_load_invalid_value(void *_data, void *val)
413 {
414 struct invalid_value_data *data = _data;
415 char val_str[VALUE_LENGTH];
416
417 if (suppress_report(&data->location))
418 return;
419
420 ubsan_prologue(&data->location, "invalid-load");
421
422 val_to_string(val_str, sizeof(val_str), data->type, val);
423
424 pr_err("load of value %s is not a valid value for type %s\n",
425 val_str, data->type->type_name);
426
427 ubsan_epilogue();
428 }
429 EXPORT_SYMBOL(__ubsan_handle_load_invalid_value);
430
> 431 void __ubsan_handle_alignment_assumption(void *_data, unsigned long ptr,
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 59573 bytes --]
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] ubsan: Implement __ubsan_handle_alignment_assumption
[not found] <20210112205542.1375847-1-natechancellor@gmail.com>
2021-01-13 0:18 ` [PATCH] ubsan: Implement __ubsan_handle_alignment_assumption kernel test robot
@ 2021-01-13 0:39 ` kernel test robot
2021-01-13 1:31 ` Nathan Chancellor
1 sibling, 1 reply; 5+ messages in thread
From: kernel test robot @ 2021-01-13 0:39 UTC (permalink / raw)
To: Nathan Chancellor, Kees Cook, Andrew Morton
Cc: kbuild-all, clang-built-linux, Linux Memory Management List,
Nick Desaulniers, linux-kernel, Nathan Chancellor
[-- Attachment #1: Type: text/plain, Size: 7053 bytes --]
Hi Nathan,
I love your patch! Perhaps something to improve:
[auto build test WARNING on 7c53f6b671f4aba70ff15e1b05148b10d58c2837]
url: https://github.com/0day-ci/linux/commits/Nathan-Chancellor/ubsan-Implement-__ubsan_handle_alignment_assumption/20210113-055714
base: 7c53f6b671f4aba70ff15e1b05148b10d58c2837
config: arm64-randconfig-r031-20210112 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 32bcfcda4e28375e5a85268d2acfabcfcc011abf)
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 arm64 cross compiling tool for clang build
# apt-get install binutils-aarch64-linux-gnu
# https://github.com/0day-ci/linux/commit/775adad26a60878926c0ee6cd460a1375bbe51e6
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Nathan-Chancellor/ubsan-Implement-__ubsan_handle_alignment_assumption/20210113-055714
git checkout 775adad26a60878926c0ee6cd460a1375bbe51e6
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
lib/ubsan.c:192:6: warning: no previous prototype for function '__ubsan_handle_add_overflow' [-Wmissing-prototypes]
void __ubsan_handle_add_overflow(void *data,
^
lib/ubsan.c:192:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __ubsan_handle_add_overflow(void *data,
^
static
lib/ubsan.c:200:6: warning: no previous prototype for function '__ubsan_handle_sub_overflow' [-Wmissing-prototypes]
void __ubsan_handle_sub_overflow(void *data,
^
lib/ubsan.c:200:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __ubsan_handle_sub_overflow(void *data,
^
static
lib/ubsan.c:207:6: warning: no previous prototype for function '__ubsan_handle_mul_overflow' [-Wmissing-prototypes]
void __ubsan_handle_mul_overflow(void *data,
^
lib/ubsan.c:207:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __ubsan_handle_mul_overflow(void *data,
^
static
lib/ubsan.c:214:6: warning: no previous prototype for function '__ubsan_handle_negate_overflow' [-Wmissing-prototypes]
void __ubsan_handle_negate_overflow(void *_data, void *old_val)
^
lib/ubsan.c:214:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __ubsan_handle_negate_overflow(void *_data, void *old_val)
^
static
lib/ubsan.c:234:6: warning: no previous prototype for function '__ubsan_handle_divrem_overflow' [-Wmissing-prototypes]
void __ubsan_handle_divrem_overflow(void *_data, void *lhs, void *rhs)
^
lib/ubsan.c:234:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __ubsan_handle_divrem_overflow(void *_data, void *lhs, void *rhs)
^
static
lib/ubsan.c:315:6: warning: no previous prototype for function '__ubsan_handle_type_mismatch' [-Wmissing-prototypes]
void __ubsan_handle_type_mismatch(struct type_mismatch_data *data,
^
lib/ubsan.c:315:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __ubsan_handle_type_mismatch(struct type_mismatch_data *data,
^
static
lib/ubsan.c:329:6: warning: no previous prototype for function '__ubsan_handle_type_mismatch_v1' [-Wmissing-prototypes]
void __ubsan_handle_type_mismatch_v1(void *_data, void *ptr)
^
lib/ubsan.c:329:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __ubsan_handle_type_mismatch_v1(void *_data, void *ptr)
^
static
lib/ubsan.c:343:6: warning: no previous prototype for function '__ubsan_handle_out_of_bounds' [-Wmissing-prototypes]
void __ubsan_handle_out_of_bounds(void *_data, void *index)
^
lib/ubsan.c:343:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __ubsan_handle_out_of_bounds(void *_data, void *index)
^
static
lib/ubsan.c:360:6: warning: no previous prototype for function '__ubsan_handle_shift_out_of_bounds' [-Wmissing-prototypes]
void __ubsan_handle_shift_out_of_bounds(void *_data, void *lhs, void *rhs)
^
lib/ubsan.c:360:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __ubsan_handle_shift_out_of_bounds(void *_data, void *lhs, void *rhs)
^
static
lib/ubsan.c:402:6: warning: no previous prototype for function '__ubsan_handle_builtin_unreachable' [-Wmissing-prototypes]
void __ubsan_handle_builtin_unreachable(void *_data)
^
lib/ubsan.c:402:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __ubsan_handle_builtin_unreachable(void *_data)
^
static
lib/ubsan.c:412:6: warning: no previous prototype for function '__ubsan_handle_load_invalid_value' [-Wmissing-prototypes]
void __ubsan_handle_load_invalid_value(void *_data, void *val)
^
lib/ubsan.c:412:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __ubsan_handle_load_invalid_value(void *_data, void *val)
^
static
>> lib/ubsan.c:431:6: warning: no previous prototype for function '__ubsan_handle_alignment_assumption' [-Wmissing-prototypes]
void __ubsan_handle_alignment_assumption(void *_data, unsigned long ptr,
^
lib/ubsan.c:431:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __ubsan_handle_alignment_assumption(void *_data, unsigned long ptr,
^
static
12 warnings generated.
vim +/__ubsan_handle_alignment_assumption +431 lib/ubsan.c
411
> 412 void __ubsan_handle_load_invalid_value(void *_data, void *val)
413 {
414 struct invalid_value_data *data = _data;
415 char val_str[VALUE_LENGTH];
416
417 if (suppress_report(&data->location))
418 return;
419
420 ubsan_prologue(&data->location, "invalid-load");
421
422 val_to_string(val_str, sizeof(val_str), data->type, val);
423
424 pr_err("load of value %s is not a valid value for type %s\n",
425 val_str, data->type->type_name);
426
427 ubsan_epilogue();
428 }
429 EXPORT_SYMBOL(__ubsan_handle_load_invalid_value);
430
> 431 void __ubsan_handle_alignment_assumption(void *_data, unsigned long ptr,
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 31723 bytes --]
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] ubsan: Implement __ubsan_handle_alignment_assumption
2021-01-13 0:39 ` kernel test robot
@ 2021-01-13 1:31 ` Nathan Chancellor
2021-01-13 1:39 ` Nick Desaulniers
0 siblings, 1 reply; 5+ messages in thread
From: Nathan Chancellor @ 2021-01-13 1:31 UTC (permalink / raw)
To: kernel test robot
Cc: Kees Cook, Andrew Morton, kbuild-all, clang-built-linux,
Linux Memory Management List, Nick Desaulniers, linux-kernel
On Wed, Jan 13, 2021 at 08:39:52AM +0800, kernel test robot wrote:
> Hi Nathan,
>
> I love your patch! Perhaps something to improve:
>
> [auto build test WARNING on 7c53f6b671f4aba70ff15e1b05148b10d58c2837]
>
> url: https://github.com/0day-ci/linux/commits/Nathan-Chancellor/ubsan-Implement-__ubsan_handle_alignment_assumption/20210113-055714
> base: 7c53f6b671f4aba70ff15e1b05148b10d58c2837
> config: arm64-randconfig-r031-20210112 (attached as .config)
> compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 32bcfcda4e28375e5a85268d2acfabcfcc011abf)
> 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 arm64 cross compiling tool for clang build
> # apt-get install binutils-aarch64-linux-gnu
> # https://github.com/0day-ci/linux/commit/775adad26a60878926c0ee6cd460a1375bbe51e6
> git remote add linux-review https://github.com/0day-ci/linux
> git fetch --no-tags linux-review Nathan-Chancellor/ubsan-Implement-__ubsan_handle_alignment_assumption/20210113-055714
> git checkout 775adad26a60878926c0ee6cd460a1375bbe51e6
> # save the attached .config to linux build tree
> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
>
> All warnings (new ones prefixed by >>):
>
> lib/ubsan.c:192:6: warning: no previous prototype for function '__ubsan_handle_add_overflow' [-Wmissing-prototypes]
> void __ubsan_handle_add_overflow(void *data,
> ^
> lib/ubsan.c:192:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
> void __ubsan_handle_add_overflow(void *data,
> ^
> static
> lib/ubsan.c:200:6: warning: no previous prototype for function '__ubsan_handle_sub_overflow' [-Wmissing-prototypes]
> void __ubsan_handle_sub_overflow(void *data,
> ^
> lib/ubsan.c:200:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
> void __ubsan_handle_sub_overflow(void *data,
> ^
Given that these are compiler inserted functions, there is not much of a
point to having prototypes to them. If people feel shutting these
warnings up is worthwhile, we can just add the prototypes right above
the function definition in a follow up patch.
Cheers,
Nathan
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] ubsan: Implement __ubsan_handle_alignment_assumption
2021-01-13 1:31 ` Nathan Chancellor
@ 2021-01-13 1:39 ` Nick Desaulniers
2021-01-27 22:26 ` Nick Desaulniers
0 siblings, 1 reply; 5+ messages in thread
From: Nick Desaulniers @ 2021-01-13 1:39 UTC (permalink / raw)
To: Nathan Chancellor
Cc: kernel test robot, Kees Cook, Andrew Morton, kbuild-all,
clang-built-linux, Linux Memory Management List, LKML
On Tue, Jan 12, 2021 at 5:31 PM Nathan Chancellor
<natechancellor@gmail.com> wrote:
>
> On Wed, Jan 13, 2021 at 08:39:52AM +0800, kernel test robot wrote:
> > Hi Nathan,
> >
> > I love your patch! Perhaps something to improve:
> >
> > [auto build test WARNING on 7c53f6b671f4aba70ff15e1b05148b10d58c2837]
> >
> > url: https://github.com/0day-ci/linux/commits/Nathan-Chancellor/ubsan-Implement-__ubsan_handle_alignment_assumption/20210113-055714
> > base: 7c53f6b671f4aba70ff15e1b05148b10d58c2837
> > config: arm64-randconfig-r031-20210112 (attached as .config)
> > compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 32bcfcda4e28375e5a85268d2acfabcfcc011abf)
> > 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 arm64 cross compiling tool for clang build
> > # apt-get install binutils-aarch64-linux-gnu
> > # https://github.com/0day-ci/linux/commit/775adad26a60878926c0ee6cd460a1375bbe51e6
> > git remote add linux-review https://github.com/0day-ci/linux
> > git fetch --no-tags linux-review Nathan-Chancellor/ubsan-Implement-__ubsan_handle_alignment_assumption/20210113-055714
> > git checkout 775adad26a60878926c0ee6cd460a1375bbe51e6
> > # save the attached .config to linux build tree
> > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64
> >
> > If you fix the issue, kindly add following tag as appropriate
> > Reported-by: kernel test robot <lkp@intel.com>
> >
> > All warnings (new ones prefixed by >>):
> >
> > lib/ubsan.c:192:6: warning: no previous prototype for function '__ubsan_handle_add_overflow' [-Wmissing-prototypes]
> > void __ubsan_handle_add_overflow(void *data,
> > ^
> > lib/ubsan.c:192:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
> > void __ubsan_handle_add_overflow(void *data,
> > ^
> > static
> > lib/ubsan.c:200:6: warning: no previous prototype for function '__ubsan_handle_sub_overflow' [-Wmissing-prototypes]
> > void __ubsan_handle_sub_overflow(void *data,
> > ^
> > lib/ubsan.c:200:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
> > void __ubsan_handle_sub_overflow(void *data,
> > ^
>
> Given that these are compiler inserted functions, there is not much of a
> point to having prototypes to them. If people feel shutting these
> warnings up is worthwhile, we can just add the prototypes right above
> the function definition in a follow up patch.
Same as stpcpy; it would be nice though. ;)
--
Thanks,
~Nick Desaulniers
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] ubsan: Implement __ubsan_handle_alignment_assumption
2021-01-13 1:39 ` Nick Desaulniers
@ 2021-01-27 22:26 ` Nick Desaulniers
0 siblings, 0 replies; 5+ messages in thread
From: Nick Desaulniers @ 2021-01-27 22:26 UTC (permalink / raw)
To: Nathan Chancellor
Cc: kernel test robot, Kees Cook, Andrew Morton, kbuild-all,
clang-built-linux, Linux Memory Management List, LKML
On Tue, Jan 12, 2021 at 5:39 PM Nick Desaulniers
<ndesaulniers@google.com> wrote:
>
> On Tue, Jan 12, 2021 at 5:31 PM Nathan Chancellor
> <natechancellor@gmail.com> wrote:
> >
> > On Wed, Jan 13, 2021 at 08:39:52AM +0800, kernel test robot wrote:
> > > Hi Nathan,
> > >
> > > I love your patch! Perhaps something to improve:
> > >
> > > [auto build test WARNING on 7c53f6b671f4aba70ff15e1b05148b10d58c2837]
> > >
> > > url: https://github.com/0day-ci/linux/commits/Nathan-Chancellor/ubsan-Implement-__ubsan_handle_alignment_assumption/20210113-055714
> > > base: 7c53f6b671f4aba70ff15e1b05148b10d58c2837
> > > config: arm64-randconfig-r031-20210112 (attached as .config)
> > > compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 32bcfcda4e28375e5a85268d2acfabcfcc011abf)
> > > 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 arm64 cross compiling tool for clang build
> > > # apt-get install binutils-aarch64-linux-gnu
> > > # https://github.com/0day-ci/linux/commit/775adad26a60878926c0ee6cd460a1375bbe51e6
> > > git remote add linux-review https://github.com/0day-ci/linux
> > > git fetch --no-tags linux-review Nathan-Chancellor/ubsan-Implement-__ubsan_handle_alignment_assumption/20210113-055714
> > > git checkout 775adad26a60878926c0ee6cd460a1375bbe51e6
> > > # save the attached .config to linux build tree
> > > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64
> > >
> > > If you fix the issue, kindly add following tag as appropriate
> > > Reported-by: kernel test robot <lkp@intel.com>
> > >
> > > All warnings (new ones prefixed by >>):
> > >
> > > lib/ubsan.c:192:6: warning: no previous prototype for function '__ubsan_handle_add_overflow' [-Wmissing-prototypes]
> > > void __ubsan_handle_add_overflow(void *data,
> > > ^
> > > lib/ubsan.c:192:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
> > > void __ubsan_handle_add_overflow(void *data,
> > > ^
> > > static
> > > lib/ubsan.c:200:6: warning: no previous prototype for function '__ubsan_handle_sub_overflow' [-Wmissing-prototypes]
> > > void __ubsan_handle_sub_overflow(void *data,
> > > ^
> > > lib/ubsan.c:200:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
> > > void __ubsan_handle_sub_overflow(void *data,
> > > ^
> >
> > Given that these are compiler inserted functions, there is not much of a
> > point to having prototypes to them. If people feel shutting these
> > warnings up is worthwhile, we can just add the prototypes right above
> > the function definition in a follow up patch.
>
> Same as stpcpy; it would be nice though. ;)
If you would be so kind, I'd be happy to sign off on such a v3.
> --
> Thanks,
> ~Nick Desaulniers
--
Thanks,
~Nick Desaulniers
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2021-01-27 22:27 UTC | newest]
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[not found] <20210112205542.1375847-1-natechancellor@gmail.com>
2021-01-13 0:18 ` [PATCH] ubsan: Implement __ubsan_handle_alignment_assumption kernel test robot
2021-01-13 0:39 ` kernel test robot
2021-01-13 1:31 ` Nathan Chancellor
2021-01-13 1:39 ` Nick Desaulniers
2021-01-27 22:26 ` Nick Desaulniers
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