[kbuild-all] drivers/gpu/drm/drm_property.c:130:2: warning: 'strncpy' specified bound 32 equals destination size

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 43cb5d49a99b3ecd9fef9826899aac948c3048da commit: 421015713b306e47af95d4d61cdfbd96d462e4cb ARM: 9017/2: Enable KASan for ARM date: 8 months ago config: arm-randconfig-r022-20210613 (attached as .config) compiler: arm-linux-gnueabi-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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 421015713b306e47af95d4d61cdfbd96d462e4cb # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/gpu/drm/drm_property.c: In function 'drm_property_create': 130 | strncpy(property->name, name, DRM_PROP_NAME_LEN); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -- In file included from include/trace/define_trace.h:103, from include/trace/events/fscache.h:533, from fs/fscache/internal.h:28, from fs/fscache/main.c:16: include/trace/events/fscache.h: In function 'perf_trace_fscache_netfs': 208 | strncpy(__entry->name, netfs->name, 8); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/trace/perf.h:66:4: note: in definition of macro 'DECLARE_EVENT_CLASS' 66 | { assign; } \ | ^~~~~~ include/trace/trace_events.h:79:9: note: in expansion of macro 'PARAMS' 79 | PARAMS(assign), \ | ^~~~~~ include/trace/events/fscache.h:196:1: note: in expansion of macro 'TRACE_EVENT' 196 | TRACE_EVENT(fscache_netfs, | ^~~~~~~~~~~ include/trace/events/fscache.h:206:6: note: in expansion of macro 'TP_fast_assign' 206 | TP_fast_assign( | ^~~~~~~~~~~~~~ In file included from include/trace/define_trace.h:102, from include/trace/events/fscache.h:533, from fs/fscache/internal.h:28, from fs/fscache/main.c:16: include/trace/events/fscache.h: In function 'trace_event_raw_event_fscache_netfs': 208 | strncpy(__entry->name, netfs->name, 8); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/trace/trace_events.h:695:4: note: in definition of macro 'DECLARE_EVENT_CLASS' 695 | { assign; } \ | ^~~~~~ include/trace/trace_events.h:79:9: note: in expansion of macro 'PARAMS' 79 | PARAMS(assign), \ | ^~~~~~ include/trace/events/fscache.h:196:1: note: in expansion of macro 'TRACE_EVENT' 196 | TRACE_EVENT(fscache_netfs, | ^~~~~~~~~~~ include/trace/events/fscache.h:206:6: note: in expansion of macro 'TP_fast_assign' 206 | TP_fast_assign( | ^~~~~~~~~~~~~~ Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for PHY_MTK_HDMI Depends on ARCH_MEDIATEK && OF Selected by - DRM_MEDIATEK_HDMI && HAS_IOMEM && DRM_MEDIATEK vim +/strncpy +130 drivers/gpu/drm/drm_property.c 59e71ee746a37f Daniel Vetter 2016-08-29 80 59e71ee746a37f Daniel Vetter 2016-08-29 81 /** 59e71ee746a37f Daniel Vetter 2016-08-29 82 * drm_property_create - create a new property type 59e71ee746a37f Daniel Vetter 2016-08-29 83 * @dev: drm device 59e71ee746a37f Daniel Vetter 2016-08-29 84 * @flags: flags specifying the property type 59e71ee746a37f Daniel Vetter 2016-08-29 85 * @name: name of the property 59e71ee746a37f Daniel Vetter 2016-08-29 86 * @num_values: number of pre-defined values 59e71ee746a37f Daniel Vetter 2016-08-29 87 * 59e71ee746a37f Daniel Vetter 2016-08-29 88 * This creates a new generic drm property which can then be attached to a drm 6a8a66eda17ea6 Daniel Vetter 2016-11-23 89 * object with drm_object_attach_property(). The returned property object must 6a8a66eda17ea6 Daniel Vetter 2016-11-23 90 * be freed with drm_property_destroy(), which is done automatically when 6a8a66eda17ea6 Daniel Vetter 2016-11-23 91 * calling drm_mode_config_cleanup(). 59e71ee746a37f Daniel Vetter 2016-08-29 92 * 59e71ee746a37f Daniel Vetter 2016-08-29 93 * Returns: 59e71ee746a37f Daniel Vetter 2016-08-29 94 * A pointer to the newly created property on success, NULL on failure. 59e71ee746a37f Daniel Vetter 2016-08-29 95 */ 51abc97658b954 Ville Syrjälä 2018-03-06 96 struct drm_property *drm_property_create(struct drm_device *dev, 51abc97658b954 Ville Syrjälä 2018-03-06 97 u32 flags, const char *name, 51abc97658b954 Ville Syrjälä 2018-03-06 98 int num_values) 59e71ee746a37f Daniel Vetter 2016-08-29 99 { 59e71ee746a37f Daniel Vetter 2016-08-29 100 struct drm_property *property = NULL; 59e71ee746a37f Daniel Vetter 2016-08-29 101 int ret; 59e71ee746a37f Daniel Vetter 2016-08-29 102 100bc0d9963b50 Ville Syrjälä 2018-03-06 103 if (WARN_ON(!drm_property_flags_valid(flags))) 100bc0d9963b50 Ville Syrjälä 2018-03-06 104 return NULL; 100bc0d9963b50 Ville Syrjälä 2018-03-06 105 5ebbb5b4d424e0 Ville Syrjälä 2018-03-02 106 if (WARN_ON(strlen(name) >= DRM_PROP_NAME_LEN)) 5ebbb5b4d424e0 Ville Syrjälä 2018-03-02 107 return NULL; 5ebbb5b4d424e0 Ville Syrjälä 2018-03-02 108 59e71ee746a37f Daniel Vetter 2016-08-29 109 property = kzalloc(sizeof(struct drm_property), GFP_KERNEL); 59e71ee746a37f Daniel Vetter 2016-08-29 110 if (!property) 59e71ee746a37f Daniel Vetter 2016-08-29 111 return NULL; 59e71ee746a37f Daniel Vetter 2016-08-29 112 59e71ee746a37f Daniel Vetter 2016-08-29 113 property->dev = dev; 59e71ee746a37f Daniel Vetter 2016-08-29 114 59e71ee746a37f Daniel Vetter 2016-08-29 115 if (num_values) { 59e71ee746a37f Daniel Vetter 2016-08-29 116 property->values = kcalloc(num_values, sizeof(uint64_t), 59e71ee746a37f Daniel Vetter 2016-08-29 117 GFP_KERNEL); 59e71ee746a37f Daniel Vetter 2016-08-29 118 if (!property->values) 59e71ee746a37f Daniel Vetter 2016-08-29 119 goto fail; 59e71ee746a37f Daniel Vetter 2016-08-29 120 } 59e71ee746a37f Daniel Vetter 2016-08-29 121 2135ea7aafa26b Thierry Reding 2017-02-28 122 ret = drm_mode_object_add(dev, &property->base, DRM_MODE_OBJECT_PROPERTY); 59e71ee746a37f Daniel Vetter 2016-08-29 123 if (ret) 59e71ee746a37f Daniel Vetter 2016-08-29 124 goto fail; 59e71ee746a37f Daniel Vetter 2016-08-29 125 59e71ee746a37f Daniel Vetter 2016-08-29 126 property->flags = flags; 59e71ee746a37f Daniel Vetter 2016-08-29 127 property->num_values = num_values; 59e71ee746a37f Daniel Vetter 2016-08-29 128 INIT_LIST_HEAD(&property->enum_list); 59e71ee746a37f Daniel Vetter 2016-08-29 129 59e71ee746a37f Daniel Vetter 2016-08-29 @130 strncpy(property->name, name, DRM_PROP_NAME_LEN); 59e71ee746a37f Daniel Vetter 2016-08-29 131 property->name[DRM_PROP_NAME_LEN-1] = '\0'; 59e71ee746a37f Daniel Vetter 2016-08-29 132 59e71ee746a37f Daniel Vetter 2016-08-29 133 list_add_tail(&property->head, &dev->mode_config.property_list); 59e71ee746a37f Daniel Vetter 2016-08-29 134 59e71ee746a37f Daniel Vetter 2016-08-29 135 return property; 59e71ee746a37f Daniel Vetter 2016-08-29 136 fail: 59e71ee746a37f Daniel Vetter 2016-08-29 137 kfree(property->values); 59e71ee746a37f Daniel Vetter 2016-08-29 138 kfree(property); 59e71ee746a37f Daniel Vetter 2016-08-29 139 return NULL; 59e71ee746a37f Daniel Vetter 2016-08-29 140 } 59e71ee746a37f Daniel Vetter 2016-08-29 141 EXPORT_SYMBOL(drm_property_create); 59e71ee746a37f Daniel Vetter 2016-08-29 142 :::::: The code at line 130 was first introduced by commit :::::: 59e71ee746a37fe077b73cecf189de1d27efd6eb drm: Extract drm_property.[hc] :::::: TO: Daniel Vetter <daniel.vetter(a)ffwll.ch&gt; :::::: CC: Daniel Vetter <daniel.vetter(a)ffwll.ch&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org