:::::: :::::: Manual check reason: "low confidence bisect report" :::::: Manual check reason: "low confidence static check warning: drivers/media/i2c/ov5693.c:518:13: warning: use of uninitialized value '<unknown>' [CWE-457] [-Wanalyzer-use-of-uninitialized-value]" ::::::
CC: [email protected] BCC: [email protected] CC: [email protected] TO: Daniel Scally <[email protected]> CC: Mauro Carvalho Chehab <[email protected]> CC: [email protected] CC: "Jean-Michel Hautbois" <[email protected]> CC: Sakari Ailus <[email protected]> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: af2c9ac24019ece9281e606662e5c78fa67f5930 commit: 89aef879cb537061f7a0948210fc00c5f1b5dfb4 media: i2c: Add support for ov5693 sensor date: 8 months ago :::::: branch date: 3 hours ago :::::: commit date: 8 months ago config: arm-randconfig-c002-20220718 (https://download.01.org/0day-ci/archive/20220725/[email protected]/config) compiler: arm-linux-gnueabi-gcc (GCC) 12.1.0 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/?id=89aef879cb537061f7a0948210fc00c5f1b5dfb4 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 89aef879cb537061f7a0948210fc00c5f1b5dfb4 # save the config file ARCH=arm KBUILD_USERCFLAGS='-fanalyzer -Wno-error' If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <[email protected]> gcc-analyzer warnings: (new ones prefixed by >>) drivers/media/i2c/ov5693.c: In function 'ov5693_get_exposure': >> drivers/media/i2c/ov5693.c:518:13: warning: use of uninitialized value >> '<unknown>' [CWE-457] [-Wanalyzer-use-of-uninitialized-value] 518 | u32 exposure; | ^~~~~~~~ 'ov5693_get_exposure': event 1 | | 518 | u32 exposure; | | ^~~~~~~~ | | | | | (1) use of uninitialized value '<unknown>' here | drivers/media/i2c/ov5693.c: In function 'ov5693_get_gain': drivers/media/i2c/ov5693.c:545:13: warning: use of uninitialized value '<unknown>' [CWE-457] [-Wanalyzer-use-of-uninitialized-value] 545 | u32 value; | ^~~~~ 'ov5693_get_gain': event 1 | | 545 | u32 value; | | ^~~~~ | | | | | (1) use of uninitialized value '<unknown>' here | drivers/media/i2c/ov5693.c: In function 'ov5693_detect': drivers/media/i2c/ov5693.c:871:13: warning: use of uninitialized value '<unknown>' [CWE-457] [-Wanalyzer-use-of-uninitialized-value] 871 | u32 id; | ^~ 'ov5693_detect': event 1 | | 871 | u32 id; | | ^~ | | | | | (1) use of uninitialized value '<unknown>' here | In file included from include/linux/kernel.h:17, from include/linux/unaligned/packed_struct.h:4, from include/asm-generic/unaligned.h:9, from ./arch/arm/include/generated/asm/unaligned.h:1, from drivers/media/i2c/ov5693.c:15: drivers/media/i2c/ov5693.c: In function 'ov5693_set_fmt': include/linux/compiler-gcc.h:42:45: warning: dereference of NULL 'crop' [CWE-476] [-Wanalyzer-null-dereference] 42 | #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__) | ^~~~~~~~~~~~ include/linux/minmax.h:32:27: note: in definition of macro '__cmp_once' 32 | typeof(y) unique_y = (y); \ | ^~~~~~~~ include/linux/compiler_types.h:60:22: note: in expansion of macro '___PASTE' 60 | #define __PASTE(a,b) ___PASTE(a,b) | ^~~~~~~~ include/linux/compiler-gcc.h:42:29: note: in expansion of macro '__PASTE' 42 | #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__) | ^~~~~~~ include/linux/compiler_types.h:60:22: note: in expansion of macro '___PASTE' 60 | #define __PASTE(a,b) ___PASTE(a,b) | ^~~~~~~~ include/linux/compiler-gcc.h:42:37: note: in expansion of macro '__PASTE' 42 | #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__) | ^~~~~~~ include/linux/minmax.h:38:52: note: in expansion of macro '__UNIQUE_ID' 38 | __cmp_once(x, y, __UNIQUE_ID(__x), __UNIQUE_ID(__y), op)) | ^~~~~~~~~~~ include/linux/minmax.h:104:33: note: in expansion of macro '__careful_cmp' 104 | #define min_t(type, x, y) __careful_cmp((type)(x), (type)(y), <) | ^~~~~~~~~~~~~ include/linux/minmax.h:124:36: note: in expansion of macro 'min_t' 124 | #define clamp_t(type, val, lo, hi) min_t(type, max_t(type, val, lo), hi) | ^~~~~ drivers/media/i2c/ov5693.c:961:17: note: in expansion of macro 'clamp_t' 961 | width = clamp_t(unsigned int, ALIGN(format->format.width, 2), | ^~~~~~~ 'ov5693_set_fmt': events 1-2 | | 942 | static int ov5693_set_fmt(struct v4l2_subdev *sd, | | ^~~~~~~~~~~~~~ | | | | | (1) entry to 'ov5693_set_fmt' |...... | 955 | crop = __ov5693_get_pad_crop(ov5693, state, format->pad, format->which); | | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | | | | | (2) calling '__ov5693_get_pad_crop' from 'ov5693_set_fmt' | +--> '__ov5693_get_pad_crop': events 3-4 | | 917 | __ov5693_get_pad_crop(struct ov5693_device *ov5693, | | ^~~~~~~~~~~~~~~~~~~~~ | | | | | (3) entry to '__ov5693_get_pad_crop' |...... | 921 | switch (which) { | | ~~~~~~ | | | | | (4) following 'default:' branch... | '__ov5693_get_pad_crop': event 5 | |cc1: | (5): ...to here | <------+ | 'ov5693_set_fmt': event 6 | vim +518 drivers/media/i2c/ov5693.c 89aef879cb5370 Daniel Scally 2021-11-23 515 89aef879cb5370 Daniel Scally 2021-11-23 516 static int ov5693_get_exposure(struct ov5693_device *ov5693, s32 *value) 89aef879cb5370 Daniel Scally 2021-11-23 517 { 89aef879cb5370 Daniel Scally 2021-11-23 @518 u32 exposure; 89aef879cb5370 Daniel Scally 2021-11-23 519 int ret; 89aef879cb5370 Daniel Scally 2021-11-23 520 89aef879cb5370 Daniel Scally 2021-11-23 521 ret = ov5693_read_reg(ov5693, OV5693_EXPOSURE_CTRL_REG, &exposure); 89aef879cb5370 Daniel Scally 2021-11-23 522 if (ret) 89aef879cb5370 Daniel Scally 2021-11-23 523 return ret; 89aef879cb5370 Daniel Scally 2021-11-23 524 89aef879cb5370 Daniel Scally 2021-11-23 525 /* The lowest 4 bits are unsupported fractional bits */ 89aef879cb5370 Daniel Scally 2021-11-23 526 *value = exposure >> 4; 89aef879cb5370 Daniel Scally 2021-11-23 527 89aef879cb5370 Daniel Scally 2021-11-23 528 return 0; 89aef879cb5370 Daniel Scally 2021-11-23 529 } 89aef879cb5370 Daniel Scally 2021-11-23 530 -- 0-DAY CI Kernel Test Service https://01.org/lkp _______________________________________________ kbuild mailing list -- [email protected] To unsubscribe send an email to [email protected]
