linux-kernel - [kees:kspp/memcpy/next-20210803/v2-devel 42/86] drivers/video/fbdev/cirrusfb.c:1852:17: sparse: sparse: incorrect type in argument 1 (different address spaces)

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [day] [month] [year] [list]
Message-ID: <202108130326.S5Xp4wRo-lkp@intel.com>
Date:   Fri, 13 Aug 2021 03:25:44 +0800
From:   kernel test robot <lkp@...el.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [kees:kspp/memcpy/next-20210803/v2-devel 42/86]
 drivers/video/fbdev/cirrusfb.c:1852:17: sparse: sparse: incorrect type in
 argument 1 (different address spaces)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git kspp/memcpy/next-20210803/v2-devel
head:   4752984fc24104f399e70f99d48afa047d86a381
commit: 21b2d9d06a3a4d6bfafc9cfe88fcfa1a48e95162 [42/86] fortify: Detect struct member overflows in memcpy() at compile-time
config: powerpc-randconfig-s031-20210810 (attached as .config)
compiler: powerpc-linux-gcc (GCC) 10.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.3-348-gf0e6938b-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git/commit/?id=21b2d9d06a3a4d6bfafc9cfe88fcfa1a48e95162
        git remote add kees https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git
        git fetch --no-tags kees kspp/memcpy/next-20210803/v2-devel
        git checkout 21b2d9d06a3a4d6bfafc9cfe88fcfa1a48e95162
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=powerpc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>


sparse warnings: (new ones prefixed by >>)
>> drivers/video/fbdev/cirrusfb.c:1852:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const * @@     got char [noderef] __iomem *screen_base @@
   drivers/video/fbdev/cirrusfb.c:1852:17: sparse:     expected void const *
   drivers/video/fbdev/cirrusfb.c:1852:17: sparse:     got char [noderef] __iomem *screen_base
>> drivers/video/fbdev/cirrusfb.c:1852:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const * @@     got char [noderef] __iomem *screen_base @@
   drivers/video/fbdev/cirrusfb.c:1852:17: sparse:     expected void const *
   drivers/video/fbdev/cirrusfb.c:1852:17: sparse:     got char [noderef] __iomem *screen_base
   drivers/video/fbdev/cirrusfb.c:1852:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void * @@     got char [noderef] __iomem *screen_base @@
   drivers/video/fbdev/cirrusfb.c:1852:17: sparse:     expected void *
   drivers/video/fbdev/cirrusfb.c:1852:17: sparse:     got char [noderef] __iomem *screen_base

vim +1852 drivers/video/fbdev/cirrusfb.c

^1da177e4c3f41 drivers/video/cirrusfb.c Linus Torvalds 2005-04-16  1809  
8503df65976d0f drivers/video/cirrusfb.c Krzysztof Helt 2007-10-16  1810  static void cirrusfb_imageblit(struct fb_info *info,
8503df65976d0f drivers/video/cirrusfb.c Krzysztof Helt 2007-10-16  1811  			       const struct fb_image *image)
^1da177e4c3f41 drivers/video/cirrusfb.c Linus Torvalds 2005-04-16  1812  {
^1da177e4c3f41 drivers/video/cirrusfb.c Linus Torvalds 2005-04-16  1813  	struct cirrusfb_info *cinfo = info->par;
7cade31cabec33 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1814  	unsigned char op = (info->var.bits_per_pixel == 24) ? 0xc : 0x4;
^1da177e4c3f41 drivers/video/cirrusfb.c Linus Torvalds 2005-04-16  1815  
9e848062533207 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1816  	if (info->state != FBINFO_STATE_RUNNING)
9e848062533207 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1817  		return;
df3aafd57d590d drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1818  	/* Alpine/SD64 does not work at 24bpp ??? */
df3aafd57d590d drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1819  	if (info->flags & FBINFO_HWACCEL_DISABLED || image->depth != 1)
df3aafd57d590d drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1820  		cfb_imageblit(info, image);
df3aafd57d590d drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1821  	else if ((cinfo->btype == BT_ALPINE || cinfo->btype == BT_SD64) &&
df3aafd57d590d drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1822  		  op == 0xc)
^1da177e4c3f41 drivers/video/cirrusfb.c Linus Torvalds 2005-04-16  1823  		cfb_imageblit(info, image);
9e848062533207 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1824  	else {
9e848062533207 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1825  		unsigned size = ((image->width + 7) >> 3) * image->height;
9e848062533207 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1826  		int m = info->var.bits_per_pixel;
9e848062533207 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1827  		u32 fg, bg;
9e848062533207 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1828  
9e848062533207 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1829  		if (info->var.bits_per_pixel == 8) {
9e848062533207 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1830  			fg = image->fg_color;
9e848062533207 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1831  			bg = image->bg_color;
9e848062533207 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1832  		} else {
9e848062533207 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1833  			fg = ((u32 *)(info->pseudo_palette))[image->fg_color];
9e848062533207 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1834  			bg = ((u32 *)(info->pseudo_palette))[image->bg_color];
9e848062533207 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1835  		}
7cade31cabec33 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1836  		if (info->var.bits_per_pixel == 24) {
7cade31cabec33 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1837  			/* clear background first */
7cade31cabec33 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1838  			cirrusfb_RectFill(cinfo->regbase,
7cade31cabec33 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1839  					  info->var.bits_per_pixel,
7cade31cabec33 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1840  					  (image->dx * m) / 8, image->dy,
7cade31cabec33 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1841  					  (image->width * m) / 8,
7cade31cabec33 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1842  					  image->height,
7cade31cabec33 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1843  					  bg, bg,
7cade31cabec33 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1844  					  info->fix.line_length, 0x40);
7cade31cabec33 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1845  		}
9e848062533207 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1846  		cirrusfb_RectFill(cinfo->regbase,
9e848062533207 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1847  				  info->var.bits_per_pixel,
9e848062533207 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1848  				  (image->dx * m) / 8, image->dy,
9e848062533207 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1849  				  (image->width * m) / 8, image->height,
9e848062533207 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1850  				  fg, bg,
7cade31cabec33 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1851  				  info->fix.line_length, op);
9e848062533207 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31 @1852  		memcpy(info->screen_base, image->data, size);
9e848062533207 drivers/video/cirrusfb.c Krzysztof Helt 2009-03-31  1853  	}
^1da177e4c3f41 drivers/video/cirrusfb.c Linus Torvalds 2005-04-16  1854  }
^1da177e4c3f41 drivers/video/cirrusfb.c Linus Torvalds 2005-04-16  1855  

:::::: The code at line 1852 was first introduced by commit
:::::: 9e848062533207130667f6eaa748549367ccbedf cirrusfb: add imageblit function

:::::: TO: Krzysztof Helt <krzysztof.h1@...pl>
:::::: CC: Linus Torvalds <torvalds@...ux-foundation.org>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

Download attachment ".config.gz" of type "application/gzip" (39812 bytes)