* drivers/gpu/drm/nouveau/nouveau_backlight.c:56:69: error: '%d' directive output may be truncated writing between 1 and 10 bytes into a region of size 3
@ 2025-01-02 13:14 kernel test robot
2025-01-03 0:38 ` Philip Li
0 siblings, 1 reply; 2+ messages in thread
From: kernel test robot @ 2025-01-02 13:14 UTC (permalink / raw)
To: Jani Nikula
Cc: oe-kbuild-all, linux-kernel, Hamza Mahfooz,
Javier Martinez Canillas
Hi Jani,
FYI, the error/warning still remains.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 56e6a3499e14716b9a28a307bb6d18c10e95301e
commit: f89632a9e5fa6c4787c14458cd42a9ef42025434 drm: Add CONFIG_DRM_WERROR
date: 10 months ago
config: loongarch-randconfig-002-20250102 (https://download.01.org/0day-ci/archive/20250102/202501022122.Pct9ERae-lkp@intel.com/config)
compiler: loongarch64-linux-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250102/202501022122.Pct9ERae-lkp@intel.com/reproduce)
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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202501022122.Pct9ERae-lkp@intel.com/
All errors (new ones prefixed by >>):
drivers/gpu/drm/nouveau/nouveau_backlight.c: In function 'nouveau_backlight_init':
>> drivers/gpu/drm/nouveau/nouveau_backlight.c:56:69: error: '%d' directive output may be truncated writing between 1 and 10 bytes into a region of size 3 [-Werror=format-truncation=]
56 | snprintf(backlight_name, BL_NAME_SIZE, "nv_backlight%d", nb);
| ^~
In function 'nouveau_get_backlight_name',
inlined from 'nouveau_backlight_init' at drivers/gpu/drm/nouveau/nouveau_backlight.c:351:7:
drivers/gpu/drm/nouveau/nouveau_backlight.c:56:56: note: directive argument in the range [1, 2147483647]
56 | snprintf(backlight_name, BL_NAME_SIZE, "nv_backlight%d", nb);
| ^~~~~~~~~~~~~~~~
drivers/gpu/drm/nouveau/nouveau_backlight.c:56:17: note: 'snprintf' output between 14 and 23 bytes into a destination of size 15
56 | snprintf(backlight_name, BL_NAME_SIZE, "nv_backlight%d", nb);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
vim +56 drivers/gpu/drm/nouveau/nouveau_backlight.c
db1a0ae21461af Pierre Moreau 2016-12-08 46
db1a0ae21461af Pierre Moreau 2016-12-08 47 static bool
6d757753cef8d5 Lyude Paul 2018-09-06 48 nouveau_get_backlight_name(char backlight_name[BL_NAME_SIZE],
6d757753cef8d5 Lyude Paul 2018-09-06 49 struct nouveau_backlight *bl)
db1a0ae21461af Pierre Moreau 2016-12-08 50 {
ab244be47a8f11 Christophe JAILLET 2022-02-09 51 const int nb = ida_alloc_max(&bl_ida, 99, GFP_KERNEL);
ab244be47a8f11 Christophe JAILLET 2022-02-09 52
ab244be47a8f11 Christophe JAILLET 2022-02-09 53 if (nb < 0)
db1a0ae21461af Pierre Moreau 2016-12-08 54 return false;
db1a0ae21461af Pierre Moreau 2016-12-08 55 if (nb > 0)
db1a0ae21461af Pierre Moreau 2016-12-08 @56 snprintf(backlight_name, BL_NAME_SIZE, "nv_backlight%d", nb);
db1a0ae21461af Pierre Moreau 2016-12-08 57 else
db1a0ae21461af Pierre Moreau 2016-12-08 58 snprintf(backlight_name, BL_NAME_SIZE, "nv_backlight");
6d757753cef8d5 Lyude Paul 2018-09-06 59 bl->id = nb;
db1a0ae21461af Pierre Moreau 2016-12-08 60 return true;
db1a0ae21461af Pierre Moreau 2016-12-08 61 }
db1a0ae21461af Pierre Moreau 2016-12-08 62
:::::: The code at line 56 was first introduced by commit
:::::: db1a0ae21461afa4bc435651a6dd55e0e6ef4a8b drm/nouveau/bl: Assign different names to interfaces
:::::: TO: Pierre Moreau <pierre.morrow@free.fr>
:::::: CC: Ben Skeggs <bskeggs@redhat.com>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: drivers/gpu/drm/nouveau/nouveau_backlight.c:56:69: error: '%d' directive output may be truncated writing between 1 and 10 bytes into a region of size 3
2025-01-02 13:14 drivers/gpu/drm/nouveau/nouveau_backlight.c:56:69: error: '%d' directive output may be truncated writing between 1 and 10 bytes into a region of size 3 kernel test robot
@ 2025-01-03 0:38 ` Philip Li
0 siblings, 0 replies; 2+ messages in thread
From: Philip Li @ 2025-01-03 0:38 UTC (permalink / raw)
To: kernel test robot
Cc: Jani Nikula, oe-kbuild-all, linux-kernel, Hamza Mahfooz,
Javier Martinez Canillas
On Thu, Jan 02, 2025 at 09:14:13PM +0800, kernel test robot wrote:
> Hi Jani,
>
> FYI, the error/warning still remains.
Sorry, kindly ignore this report that the commit is not the initial cause of the issue.
>
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head: 56e6a3499e14716b9a28a307bb6d18c10e95301e
> commit: f89632a9e5fa6c4787c14458cd42a9ef42025434 drm: Add CONFIG_DRM_WERROR
> date: 10 months ago
> config: loongarch-randconfig-002-20250102 (https://download.01.org/0day-ci/archive/20250102/202501022122.Pct9ERae-lkp@intel.com/config)
> compiler: loongarch64-linux-gcc (GCC) 14.2.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250102/202501022122.Pct9ERae-lkp@intel.com/reproduce)
>
> 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@intel.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202501022122.Pct9ERae-lkp@intel.com/
>
> All errors (new ones prefixed by >>):
>
> drivers/gpu/drm/nouveau/nouveau_backlight.c: In function 'nouveau_backlight_init':
> >> drivers/gpu/drm/nouveau/nouveau_backlight.c:56:69: error: '%d' directive output may be truncated writing between 1 and 10 bytes into a region of size 3 [-Werror=format-truncation=]
> 56 | snprintf(backlight_name, BL_NAME_SIZE, "nv_backlight%d", nb);
> | ^~
> In function 'nouveau_get_backlight_name',
> inlined from 'nouveau_backlight_init' at drivers/gpu/drm/nouveau/nouveau_backlight.c:351:7:
> drivers/gpu/drm/nouveau/nouveau_backlight.c:56:56: note: directive argument in the range [1, 2147483647]
> 56 | snprintf(backlight_name, BL_NAME_SIZE, "nv_backlight%d", nb);
> | ^~~~~~~~~~~~~~~~
> drivers/gpu/drm/nouveau/nouveau_backlight.c:56:17: note: 'snprintf' output between 14 and 23 bytes into a destination of size 15
> 56 | snprintf(backlight_name, BL_NAME_SIZE, "nv_backlight%d", nb);
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> cc1: all warnings being treated as errors
>
>
> vim +56 drivers/gpu/drm/nouveau/nouveau_backlight.c
>
> db1a0ae21461af Pierre Moreau 2016-12-08 46
> db1a0ae21461af Pierre Moreau 2016-12-08 47 static bool
> 6d757753cef8d5 Lyude Paul 2018-09-06 48 nouveau_get_backlight_name(char backlight_name[BL_NAME_SIZE],
> 6d757753cef8d5 Lyude Paul 2018-09-06 49 struct nouveau_backlight *bl)
> db1a0ae21461af Pierre Moreau 2016-12-08 50 {
> ab244be47a8f11 Christophe JAILLET 2022-02-09 51 const int nb = ida_alloc_max(&bl_ida, 99, GFP_KERNEL);
> ab244be47a8f11 Christophe JAILLET 2022-02-09 52
> ab244be47a8f11 Christophe JAILLET 2022-02-09 53 if (nb < 0)
> db1a0ae21461af Pierre Moreau 2016-12-08 54 return false;
> db1a0ae21461af Pierre Moreau 2016-12-08 55 if (nb > 0)
> db1a0ae21461af Pierre Moreau 2016-12-08 @56 snprintf(backlight_name, BL_NAME_SIZE, "nv_backlight%d", nb);
> db1a0ae21461af Pierre Moreau 2016-12-08 57 else
> db1a0ae21461af Pierre Moreau 2016-12-08 58 snprintf(backlight_name, BL_NAME_SIZE, "nv_backlight");
> 6d757753cef8d5 Lyude Paul 2018-09-06 59 bl->id = nb;
> db1a0ae21461af Pierre Moreau 2016-12-08 60 return true;
> db1a0ae21461af Pierre Moreau 2016-12-08 61 }
> db1a0ae21461af Pierre Moreau 2016-12-08 62
>
> :::::: The code at line 56 was first introduced by commit
> :::::: db1a0ae21461afa4bc435651a6dd55e0e6ef4a8b drm/nouveau/bl: Assign different names to interfaces
>
> :::::: TO: Pierre Moreau <pierre.morrow@free.fr>
> :::::: CC: Ben Skeggs <bskeggs@redhat.com>
>
> --
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests/wiki
>
^ permalink raw reply [flat|nested] 2+ messages in thread
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2025-01-02 13:14 drivers/gpu/drm/nouveau/nouveau_backlight.c:56:69: error: '%d' directive output may be truncated writing between 1 and 10 bytes into a region of size 3 kernel test robot
2025-01-03 0:38 ` Philip Li
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