[kbuild-all] [kees:kspp/memcpy/next-20210803/v2-devel 70/86] drivers/video/fbdev/atmel_lcdfb.c:362:9: sparse: sparse: incorrect type in argument 1 (different address spaces)

Friday, 13 August 2021


tree:   https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git
kspp/memcpy/next-20210803/v2-devel
head:   4752984fc24104f399e70f99d48afa047d86a381
commit: 28c76742b0c2f562e9cdc38621f12b4c10ee22db [70/86] fortify: Detect struct member
overflows in memset() 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...
        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 28c76742b0c2f562e9cdc38621f12b4c10ee22db
        # 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(a)intel.com&gt;


sparse warnings: (new ones prefixed by >>)
   drivers/video/fbdev/atmel_lcdfb.c:354:27: sparse: sparse: incorrect type in assignment
(different address spaces) @@     expected char [noderef] __iomem *screen_base @@     got
void * @@
   drivers/video/fbdev/atmel_lcdfb.c:354:27: sparse:     expected char [noderef] __iomem
*screen_base
   drivers/video/fbdev/atmel_lcdfb.c:354:27: sparse:     got void *
...
> drivers/video/fbdev/atmel_lcdfb.c:362:9: sparse: sparse:
incorrect type in argument 1 (different address spaces) @@     expected void const * @@   
 got char [noderef] __iomem *screen_base @@   
drivers/video/fbdev/atmel_lcdfb.c:362:9: sparse:     expected void const *
   drivers/video/fbdev/atmel_lcdfb.c:362:9: sparse:     got char [noderef] __iomem
*screen_base
...
> drivers/video/fbdev/atmel_lcdfb.c:362:9: sparse: sparse:
incorrect type in argument 1 (different address spaces) @@     expected void const * @@   
 got char [noderef] __iomem *screen_base @@   
drivers/video/fbdev/atmel_lcdfb.c:362:9: sparse:     expected void const *
   drivers/video/fbdev/atmel_lcdfb.c:362:9: sparse:     got char [noderef] __iomem
*screen_base
   drivers/video/fbdev/atmel_lcdfb.c:362:9: sparse: sparse: incorrect type in argument 1
(different address spaces) @@     expected void * @@     got char [noderef] __iomem
*screen_base @@
   drivers/video/fbdev/atmel_lcdfb.c:362:9: sparse:     expected void *
   drivers/video/fbdev/atmel_lcdfb.c:362:9: sparse:     got char [noderef] __iomem
*screen_base
   drivers/video/fbdev/atmel_lcdfb.c:333:59: sparse: sparse: incorrect type in argument 3
(different address spaces) @@     expected void *cpu_addr @@     got char [noderef]
__iomem *screen_base @@
   drivers/video/fbdev/atmel_lcdfb.c:333:59: sparse:     expected void *cpu_addr
   drivers/video/fbdev/atmel_lcdfb.c:333:59: sparse:     got char [noderef] __iomem
*screen_base
   drivers/video/fbdev/atmel_lcdfb.c:333:59: sparse: sparse: incorrect type in argument 3
(different address spaces) @@     expected void *cpu_addr @@     got char [noderef]
__iomem *screen_base @@
   drivers/video/fbdev/atmel_lcdfb.c:333:59: sparse:     expected void *cpu_addr
   drivers/video/fbdev/atmel_lcdfb.c:333:59: sparse:     got char [noderef] __iomem
*screen_base

vim +362 drivers/video/fbdev/atmel_lcdfb.c

14340586148e7c drivers/video/atmel_lcdfb.c       Nicolas Ferre      2007-05-10  336  
14340586148e7c drivers/video/atmel_lcdfb.c       Nicolas Ferre      2007-05-10  337  /**
14340586148e7c drivers/video/atmel_lcdfb.c       Nicolas Ferre      2007-05-10  338  
*	atmel_lcdfb_alloc_video_memory - Allocate framebuffer memory
14340586148e7c drivers/video/atmel_lcdfb.c       Nicolas Ferre      2007-05-10  339  
*	@sinfo: the frame buffer to allocate memory for
1d01e83557105e drivers/video/atmel_lcdfb.c       Krzysztof Helt     2009-07-08  340   * 	
1d01e83557105e drivers/video/atmel_lcdfb.c       Krzysztof Helt     2009-07-08  341   *
	This function is called only from the atmel_lcdfb_probe()
1d01e83557105e drivers/video/atmel_lcdfb.c       Krzysztof Helt     2009-07-08  342   *
	so no locking by fb_info->mm_lock around smem_len setting is needed.
14340586148e7c drivers/video/atmel_lcdfb.c       Nicolas Ferre      2007-05-10  343   */
14340586148e7c drivers/video/atmel_lcdfb.c       Nicolas Ferre      2007-05-10  344 
static int atmel_lcdfb_alloc_video_memory(struct atmel_lcdfb_info *sinfo)
14340586148e7c drivers/video/atmel_lcdfb.c       Nicolas Ferre      2007-05-10  345  {
14340586148e7c drivers/video/atmel_lcdfb.c       Nicolas Ferre      2007-05-10  346 
	struct fb_info *info = sinfo->info;
14340586148e7c drivers/video/atmel_lcdfb.c       Nicolas Ferre      2007-05-10  347 
	struct fb_var_screeninfo *var = &info->var;
ea757acad5a518 drivers/video/atmel_lcdfb.c       Haavard Skinnemoen 2008-08-12  348 
	unsigned int smem_len;
14340586148e7c drivers/video/atmel_lcdfb.c       Nicolas Ferre      2007-05-10  349  
ea757acad5a518 drivers/video/atmel_lcdfb.c       Haavard Skinnemoen 2008-08-12  350 
	smem_len = (var->xres_virtual * var->yres_virtual
14340586148e7c drivers/video/atmel_lcdfb.c       Nicolas Ferre      2007-05-10  351  		   
* ((var->bits_per_pixel + 7) / 8));
ea757acad5a518 drivers/video/atmel_lcdfb.c       Haavard Skinnemoen 2008-08-12  352 
	info->fix.smem_len = max(smem_len, sinfo->smem_len);
14340586148e7c drivers/video/atmel_lcdfb.c       Nicolas Ferre      2007-05-10  353  
f6e45661f9be54 drivers/video/fbdev/atmel_lcdfb.c Luis R. Rodriguez  2016-01-22  354 
	info->screen_base = dma_alloc_wc(info->device, info->fix.smem_len,
f6e45661f9be54 drivers/video/fbdev/atmel_lcdfb.c Luis R. Rodriguez  2016-01-22  355  					
(dma_addr_t *)&info->fix.smem_start,
f6e45661f9be54 drivers/video/fbdev/atmel_lcdfb.c Luis R. Rodriguez  2016-01-22  356  					
GFP_KERNEL);
14340586148e7c drivers/video/atmel_lcdfb.c       Nicolas Ferre      2007-05-10  357  
14340586148e7c drivers/video/atmel_lcdfb.c       Nicolas Ferre      2007-05-10  358  	if
(!info->screen_base) {
14340586148e7c drivers/video/atmel_lcdfb.c       Nicolas Ferre      2007-05-10  359 
		return -ENOMEM;
14340586148e7c drivers/video/atmel_lcdfb.c       Nicolas Ferre      2007-05-10  360  	}
14340586148e7c drivers/video/atmel_lcdfb.c       Nicolas Ferre      2007-05-10  361  
01d3a5e7fab773 drivers/video/atmel_lcdfb.c       Haavard Skinnemoen 2008-04-28 @362 
	memset(info->screen_base, 0, info->fix.smem_len);
01d3a5e7fab773 drivers/video/atmel_lcdfb.c       Haavard Skinnemoen 2008-04-28  363  
14340586148e7c drivers/video/atmel_lcdfb.c       Nicolas Ferre      2007-05-10  364 
	return 0;
14340586148e7c drivers/video/atmel_lcdfb.c       Nicolas Ferre      2007-05-10  365  }
14340586148e7c drivers/video/atmel_lcdfb.c       Nicolas Ferre      2007-05-10  366  

:::::: The code at line 362 was first introduced by commit
:::::: 01d3a5e7fab7732cfc5d5d4533e9378ea435295a atmel_lcdfb: don't initialize a
pre-allocated framebuffer

:::::: TO: Haavard Skinnemoen <hskinnemoen(a)atmel.com&gt;
:::::: CC: Linus Torvalds <torvalds(a)linux-foundation.org&gt;

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

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[kbuild-all] [kees:kspp/memcpy/next-20210803/v2-devel 70/86] drivers/video/fbdev/atmel_lcdfb.c:362:9: sparse: sparse: incorrect type in argument 1 (different address spaces)