[peterz-queue:x86/entry 5/8] include/linux/compiler-gcc.h:153:5: note: in expansion of macro '__has_attribute'
5:48 a.m.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git x86/entry
head: 8e8bb06d199a5aa7a534aa3b3fc0abbbc11ca438
commit: 5144f8a8dfd7b3681f0a2b5bf599a210b2315018 [5/8] compiler_types.h: Add
__no_sanitize_{address,undefined} to noinstr
config: i386-randconfig-a006-20200615 (attached as .config)
compiler: gcc-4.9 (Ubuntu 4.9.3-13ubuntu2) 4.9.3
reproduce (this is a W=1 build):
git checkout 5144f8a8dfd7b3681f0a2b5bf599a210b2315018
# save the attached .config to linux build tree
make W=1 ARCH=i386
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
All warnings (new ones prefixed by >>, old ones prefixed by <<):
In file included from include/linux/compiler_types.h:59:0,
from <command-line>:0:
> include/linux/compiler_attributes.h:35:29: warning:
"__GCC4_has_attribute___no_sanitize_undefined__" is not defined [-Wundef]
# define __has_attribute(x) __GCC4_has_attribute_##x
^
> include/linux/compiler-gcc.h:153:5: note: in expansion of macro
'__has_attribute'
#if __has_attribute(__no_sanitize_undefined__)
^
--
In file included from include/linux/compiler_types.h:59:0,
from <command-line>:0:
> include/linux/compiler_attributes.h:35:29: warning:
"__GCC4_has_attribute___no_sanitize_undefined__" is not defined [-Wundef]
# define __has_attribute(x) __GCC4_has_attribute_##x
^
> include/linux/compiler-gcc.h:153:5: note: in expansion of macro
'__has_attribute'
#if __has_attribute(__no_sanitize_undefined__)
^
drivers/xen/xenbus/xenbus_client.c: In function 'xenbus_va_dev_error':
drivers/xen/xenbus/xenbus_client.c:276:2: warning: function might be possible candidate
for 'gnu_printf' format attribute [-Wsuggest-attribute=format]
vsnprintf(printf_buffer + len, PRINTF_BUFFER_SIZE - len, fmt, ap);
^
--
In file included from include/linux/compiler_types.h:59:0,
from <command-line>:0:
> include/linux/compiler_attributes.h:35:29: warning:
"__GCC4_has_attribute___no_sanitize_undefined__" is not defined [-Wundef]
# define __has_attribute(x) __GCC4_has_attribute_##x
^
> include/linux/compiler-gcc.h:153:5: note: in expansion of macro
'__has_attribute'
#if __has_attribute(__no_sanitize_undefined__)
^
lib/math/div64.c:29:32: warning: no previous prototype for '__div64_32'
[-Wmissing-prototypes]
uint32_t __attribute__((weak)) __div64_32(uint64_t *n, uint32_t base)
^
--
In file included from include/linux/compiler_types.h:59:0,
from <command-line>:0:
> include/linux/compiler_attributes.h:35:29: warning:
"__GCC4_has_attribute___no_sanitize_undefined__" is not defined [-Wundef]
# define __has_attribute(x) __GCC4_has_attribute_##x
^
> include/linux/compiler-gcc.h:153:5: note: in expansion of macro
'__has_attribute'
#if __has_attribute(__no_sanitize_undefined__)
^
drivers/regulator/core.c:3805:5: warning: no previous prototype for
'regulator_suspend_enable' [-Wmissing-prototypes]
int regulator_suspend_enable(struct regulator_dev *rdev,
^
drivers/regulator/core.c:3812:5: warning: no previous prototype for
'regulator_suspend_disable' [-Wmissing-prototypes]
int regulator_suspend_disable(struct regulator_dev *rdev,
^
drivers/regulator/core.c:3851:5: warning: no previous prototype for
'regulator_set_suspend_voltage' [-Wmissing-prototypes]
int regulator_set_suspend_voltage(struct regulator *regulator, int min_uV,
^
--
In file included from include/linux/compiler_types.h:59:0,
from <command-line>:0:
> include/linux/compiler_attributes.h:35:29: warning:
"__GCC4_has_attribute___no_sanitize_undefined__" is not defined [-Wundef]
# define __has_attribute(x) __GCC4_has_attribute_##x
^
> include/linux/compiler-gcc.h:153:5: note: in expansion of macro
'__has_attribute'
#if __has_attribute(__no_sanitize_undefined__)
^
drivers/regulator/da9063-regulator.c:515:3: warning: initialized field overwritten
[-Woverride-init]
.suspend = BFIELD(DA9063_REG_LDO9_CONT, DA9063_VLDO9_SEL),
^
drivers/regulator/da9063-regulator.c:515:3: warning: (near initialization for
'da9063_regulator_info[11].suspend') [-Woverride-init]
--
In file included from include/linux/compiler_types.h:59:0,
from <command-line>:0:
> include/linux/compiler_attributes.h:35:29: warning:
"__GCC4_has_attribute___no_sanitize_undefined__" is not defined [-Wundef]
# define __has_attribute(x) __GCC4_has_attribute_##x
^
> include/linux/compiler-gcc.h:153:5: note: in expansion of macro
'__has_attribute'
#if __has_attribute(__no_sanitize_undefined__)
^
drivers/regulator/tps65218-regulator.c: In function
'tps65218_pmic_set_suspend_enable':
drivers/regulator/tps65218-regulator.c:131:10: warning: comparison of unsigned expression
< 0 is always false [-Wtype-limits]
if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
^
drivers/regulator/tps65218-regulator.c: In function
'tps65218_pmic_set_suspend_disable':
drivers/regulator/tps65218-regulator.c:144:10: warning: comparison of unsigned expression
< 0 is always false [-Wtype-limits]
if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
^
--
In file included from include/linux/compiler_types.h:59:0,
from <command-line>:0:
> include/linux/compiler_attributes.h:35:29: warning:
"__GCC4_has_attribute___no_sanitize_undefined__" is not defined [-Wundef]
# define __has_attribute(x) __GCC4_has_attribute_##x
^
> include/linux/compiler-gcc.h:153:5: note: in expansion of macro
'__has_attribute'
#if __has_attribute(__no_sanitize_undefined__)
^
arch/x86/lib/cmdline.c:204:5: warning: no previous prototype for
'cmdline_find_option_bool' [-Wmissing-prototypes]
int cmdline_find_option_bool(const char *cmdline, const char *option)
^
arch/x86/lib/cmdline.c:209:5: warning: no previous prototype for
'cmdline_find_option' [-Wmissing-prototypes]
int cmdline_find_option(const char *cmdline, const char *option, char *buffer,
^
--
In file included from include/linux/compiler_types.h:59:0,
from <command-line>:0:
> include/linux/compiler_attributes.h:35:29: warning:
"__GCC4_has_attribute___no_sanitize_undefined__" is not defined [-Wundef]
# define __has_attribute(x) __GCC4_has_attribute_##x
^
> include/linux/compiler-gcc.h:153:5: note: in expansion of macro
'__has_attribute'
#if __has_attribute(__no_sanitize_undefined__)
^
arch/x86/lib/misc.c:7:5: warning: no previous prototype for 'num_digits'
[-Wmissing-prototypes]
int num_digits(int val)
^
--
In file included from include/linux/compiler_types.h:59:0,
from <command-line>:0:
> include/linux/compiler_attributes.h:35:29: warning:
"__GCC4_has_attribute___no_sanitize_undefined__" is not defined [-Wundef]
# define __has_attribute(x) __GCC4_has_attribute_##x
^
> include/linux/compiler-gcc.h:153:5: note: in expansion of macro
'__has_attribute'
#if __has_attribute(__no_sanitize_undefined__)
^
arch/x86/lib/msr.c:39:5: warning: no previous prototype for 'msr_read'
[-Wmissing-prototypes]
int msr_read(u32 msr, struct msr *m)
^
arch/x86/lib/msr.c:57:5: warning: no previous prototype for 'msr_write'
[-Wmissing-prototypes]
int msr_write(u32 msr, struct msr *m)
^
--
In file included from include/linux/compiler_types.h:59:0,
from <command-line>:0:
> include/linux/compiler_attributes.h:35:29: warning:
"__GCC4_has_attribute___no_sanitize_undefined__" is not defined [-Wundef]
# define __has_attribute(x) __GCC4_has_attribute_##x
^
> include/linux/compiler-gcc.h:153:5: note: in expansion of macro
'__has_attribute'
#if __has_attribute(__no_sanitize_undefined__)
^
fs/ext4/super.c: In function 'ext4_remount':
fs/ext4/super.c:5384:6: warning: variable 'enable_quota' set but not used
[-Wunused-but-set-variable]
int enable_quota = 0;
^
--
In file included from include/linux/compiler_types.h:59:0,
from <command-line>:0:
> include/linux/compiler_attributes.h:35:29: warning:
"__GCC4_has_attribute___no_sanitize_undefined__" is not defined [-Wundef]
# define __has_attribute(x) __GCC4_has_attribute_##x
^
> include/linux/compiler-gcc.h:153:5: note: in expansion of macro
'__has_attribute'
#if __has_attribute(__no_sanitize_undefined__)
^
drivers/tty/tty_ldisc.c:884:6: warning: no previous prototype for
'tty_sysctl_init' [-Wmissing-prototypes]
void tty_sysctl_init(void)
^
..
vim +/__has_attribute +153 include/linux/compiler-gcc.h
152
153 #if __has_attribute(__no_sanitize_undefined__)
154 #define __no_sanitize_undefined __attribute__((no_sanitize_undefined))
155 #else
156 #define __no_sanitize_undefined
157 #endif
158
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
9:15 a.m.
New subject: [PATCH] compiler_attributes.h: Support no_sanitize_undefined check with GCC 4
UBSAN is supported since GCC 4.9, which unfortunately did not yet have
__has_attribute(). To work around, the __GCC4_has_attribute workaround
requires defining which compiler version supports the given attribute.
In the case of no_sanitize_undefined, it is the first version that
supports UBSAN, which is GCC 4.9.
Reported-by: kernel test robot <lkp(a)intel.com>
Signed-off-by: Marco Elver <elver(a)google.com>
---
Doing a 'make W=1' with GCC 4.9 and the provided config fixes the build
robot's report.
Peter: Feel free to either squash this patch into the one adding
__no_sanitize_undefined or apply on top.
Although at this point we don't have any users of
__no_sanitize_undefined anymore since objtool resolved the noinstr
problem for UBSAN differently. We should probably keep the attribute
around because eventually somebody will need it.
Thanks,
-- Marco
---
include/linux/compiler_attributes.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/linux/compiler_attributes.h b/include/linux/compiler_attributes.h
index cdf016596659..c8f03d2969df 100644
--- a/include/linux/compiler_attributes.h
+++ b/include/linux/compiler_attributes.h
@@ -40,6 +40,7 @@
# define __GCC4_has_attribute___noclone__ 1
# define __GCC4_has_attribute___nonstring__ 0
# define __GCC4_has_attribute___no_sanitize_address__ (__GNUC_MINOR__ >= 8)
+# define __GCC4_has_attribute___no_sanitize_undefined__ (__GNUC_MINOR__ >= 9)
# define __GCC4_has_attribute___fallthrough__ 0
#endif
--
2.27.0.290.gba653c62da-goog
11:19 p.m.
New subject: [PATCH] compiler_attributes.h: Support no_sanitize_undefined check with GCC 4
On Tue, Jun 16, 2020 at 01:15:29AM +0200, Marco Elver wrote:
UBSAN is supported since GCC 4.9, which unfortunately did not yet
have
__has_attribute(). To work around, the __GCC4_has_attribute workaround
requires defining which compiler version supports the given attribute.
In the case of no_sanitize_undefined, it is the first version that
supports UBSAN, which is GCC 4.9.
Reported-by: kernel test robot <lkp(a)intel.com>
Signed-off-by: Marco Elver <elver(a)google.com>
---
Doing a 'make W=1' with GCC 4.9 and the provided config fixes the build
robot's report.
Peter: Feel free to either squash this patch into the one adding
__no_sanitize_undefined or apply on top.
Yeah, argh! So I only saw this thread now, even though I'd already
pushed out x86/entry to tip last night due to getting:
301805 N + Jun 16 kernel test rob (5.8K) [peterz-queue:x86/entry] BUILD SUCCESS
8e8bb06d199a5aa7a534aa3b3fc0abbbc11ca438
Why that thing is claiming SUCCESS when it introduces a build error I
don't know.
Anyway, let me go push this thing on top.
11 a.m.
New subject: [PATCH] compiler_attributes.h: Support no_sanitize_undefined check with GCC 4
On Tue, Jun 16, 2020 at 03:19:21PM +0200, Peter Zijlstra wrote:
On Tue, Jun 16, 2020 at 01:15:29AM +0200, Marco Elver wrote:
> UBSAN is supported since GCC 4.9, which unfortunately did not yet have
> __has_attribute(). To work around, the __GCC4_has_attribute workaround
> requires defining which compiler version supports the given attribute.
>
> In the case of no_sanitize_undefined, it is the first version that
> supports UBSAN, which is GCC 4.9.
>
> Reported-by: kernel test robot <lkp(a)intel.com>
> Signed-off-by: Marco Elver <elver(a)google.com>
> ---
>
> Doing a 'make W=1' with GCC 4.9 and the provided config fixes the build
> robot's report.
>
> Peter: Feel free to either squash this patch into the one adding
> __no_sanitize_undefined or apply on top.
Yeah, argh! So I only saw this thread now, even though I'd already
pushed out x86/entry to tip last night due to getting:
301805 N + Jun 16 kernel test rob (5.8K) [peterz-queue:x86/entry] BUILD SUCCESS
8e8bb06d199a5aa7a534aa3b3fc0abbbc11ca438
Why that thing is claiming SUCCESS when it introduces a build error I
don't know.
Hi Peter,
Sorry for the misunderstanding, some folks complained that it's too
noisy when there're only new warnings in a "BUILD REGRESSION" report,
so we changed to use "BUILD SUCCESS" if there's no new build error. To
avoid misunderstanding, we'll change build complete report title to
"BUILD SUCCESS WITH WARNING" for new warnings.
Best Regards,
Rong Chen
6:30 p.m.
New subject: [PATCH] compiler_attributes.h: Support no_sanitize_undefined check with GCC 4
On Wed, Jun 17, 2020 at 09:00:51AM +0800, Rong Chen wrote:
On Tue, Jun 16, 2020 at 03:19:21PM +0200, Peter Zijlstra wrote:
> 301805 N + Jun 16 kernel test rob (5.8K)
[peterz-queue:x86/entry] BUILD SUCCESS 8e8bb06d199a5aa7a534aa3b3fc0abbbc11ca438
>
> Why that thing is claiming SUCCESS when it introduces a build error I
> don't know.
Sorry for the misunderstanding, some folks complained that it's
too
noisy when there're only new warnings in a "BUILD REGRESSION" report,
so we changed to use "BUILD SUCCESS" if there's no new build error. To
avoid misunderstanding, we'll change build complete report title to
"BUILD SUCCESS WITH WARNING" for new warnings.
Thanks Rong!
826
days inactive
828
days old
4 comments
4 participants
participants (4)
-
kernel test robot -
Marco Elver -
Peter Zijlstra -
Rong Chen