Re: [PATCH] media: mediatek: vcodec: Fix potential array out-of-bounds in decoder queue_setup

kernel test robot
2023-03-28T17:55:29Z

config: csky-randconfig-r013-20230327 (https://download.01.org/0day-ci/archive/20230329/202303290137.F9lOyCT4-lkp@intel.com/config)
compiler: csky-linux-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://github.com/intel-lab-lkp/linux/commit/caa43627286fb5f3b0b3af7e01e1baeca5c5f9cc
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Wei-Chen/media-mediatek-vcodec-Fix-potential-array-out-of-bounds-in-decoder-queue_setup/20230328-181142
git checkout caa43627286fb5f3b0b3af7e01e1baeca5c5f9cc
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=csky olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=csky SHELL=/bin/bash drivers/media/platform/mediatek/vcodec/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202303290137.F9lOyCT4-lkp@intel.com/

All warnings (new ones prefixed by >>):

In file included from include/asm-generic/div64.h:27,
from ./arch/csky/include/generated/asm/div64.h:1,
from include/linux/math.h:6,
from include/linux/math64.h:6,
from include/linux/time.h:6,
from include/linux/videodev2.h:59,
from include/media/v4l2-event.h:16,
from drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec.c:8:
drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec.c: In function 'vb2ops_vdec_queue_setup':
>> include/linux/compiler.h:56:26: warning: suggest explicit braces to avoid ambiguous 'else' [-Wdangling-else]
56 | #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
| ^
drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec.c:756:17: note: in expansion of macro 'if'
756 | if (vq->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
| ^~

vim +/else +56 include/linux/compiler.h

2bcd521a684cc9 Steven Rostedt 2008-11-21 50
2bcd521a684cc9 Steven Rostedt 2008-11-21 51 #ifdef CONFIG_PROFILE_ALL_BRANCHES
2bcd521a684cc9 Steven Rostedt 2008-11-21 52 /*
2bcd521a684cc9 Steven Rostedt 2008-11-21 53 * "Define 'is'", Bill Clinton
2bcd521a684cc9 Steven Rostedt 2008-11-21 54 * "Define 'if'", Steven Rostedt
2bcd521a684cc9 Steven Rostedt 2008-11-21 55 */
a15fd609ad53a6 Linus Torvalds 2019-03-20 @56 #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
a15fd609ad53a6 Linus Torvalds 2019-03-20 57