linux-kernel - drivers/gpu/drm/tests/drm_format_helper_test.c:757:36: sparse: sparse: incorrect type in argument 2 (different base types)

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Message-ID: <202310290946.jEGJ6TC7-lkp@intel.com>
Date:   Sun, 29 Oct 2023 09:16:09 +0800
From:   kernel test robot <lkp@...el.com>
To:     Melissa Wen <melissa.srw@...il.com>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Dave Airlie <airlied@...hat.com>
Subject: drivers/gpu/drm/tests/drm_format_helper_test.c:757:36: sparse:
 sparse: incorrect type in argument 2 (different base types)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   2af9b20dbb39f6ebf9b9b6c090271594627d818e
commit: c37ea39c1fa880da0d7fd2c719e5c96be19f0fc5 Merge tag 'drm-misc-next-2023-01-12' of git://anongit.freedesktop.org/drm/drm-misc into drm-next
date:   10 months ago
config: x86_64-randconfig-123-20231016 (https://download.01.org/0day-ci/archive/20231029/202310290946.jEGJ6TC7-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231029/202310290946.jEGJ6TC7-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202310290946.jEGJ6TC7-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/gpu/drm/tests/drm_format_helper_test.c:757:36: sparse: sparse: incorrect type in argument 2 (different base types) @@     expected restricted __le32 const [usertype] *buf @@     got unsigned int [usertype] *[assigned] buf @@
   drivers/gpu/drm/tests/drm_format_helper_test.c:757:36: sparse:     expected restricted __le32 const [usertype] *buf
   drivers/gpu/drm/tests/drm_format_helper_test.c:757:36: sparse:     got unsigned int [usertype] *[assigned] buf

vim +757 drivers/gpu/drm/tests/drm_format_helper_test.c

175073d694cd9d Thomas Zimmermann 2023-01-02  729  
453114319699b6 José Expósito     2022-09-26  730  static void drm_test_fb_xrgb8888_to_xrgb2101010(struct kunit *test)
453114319699b6 José Expósito     2022-09-26  731  {
453114319699b6 José Expósito     2022-09-26  732  	const struct convert_xrgb8888_case *params = test->param_value;
453114319699b6 José Expósito     2022-09-26  733  	const struct convert_to_xrgb2101010_result *result = &params->xrgb2101010_result;
453114319699b6 José Expósito     2022-09-26  734  	size_t dst_size;
4db88a9026c220 Thomas Zimmermann 2023-01-02  735  	u32 *buf = NULL;
58f5d9830da0d4 Thomas Zimmermann 2023-01-02  736  	__le32 *xrgb8888 = NULL;
453114319699b6 José Expósito     2022-09-26  737  	struct iosys_map dst, src;
453114319699b6 José Expósito     2022-09-26  738  
453114319699b6 José Expósito     2022-09-26  739  	struct drm_framebuffer fb = {
453114319699b6 José Expósito     2022-09-26  740  		.format = drm_format_info(DRM_FORMAT_XRGB8888),
453114319699b6 José Expósito     2022-09-26  741  		.pitches = { params->pitch, 0, 0 },
453114319699b6 José Expósito     2022-09-26  742  	};
453114319699b6 José Expósito     2022-09-26  743  
453114319699b6 José Expósito     2022-09-26  744  	dst_size = conversion_buf_size(DRM_FORMAT_XRGB2101010,
453114319699b6 José Expósito     2022-09-26  745  				       result->dst_pitch, &params->clip);
453114319699b6 José Expósito     2022-09-26  746  	KUNIT_ASSERT_GT(test, dst_size, 0);
453114319699b6 José Expósito     2022-09-26  747  
453114319699b6 José Expósito     2022-09-26  748  	buf = kunit_kzalloc(test, dst_size, GFP_KERNEL);
453114319699b6 José Expósito     2022-09-26  749  	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, buf);
453114319699b6 José Expósito     2022-09-26  750  	iosys_map_set_vaddr(&dst, buf);
453114319699b6 José Expósito     2022-09-26  751  
58f5d9830da0d4 Thomas Zimmermann 2023-01-02  752  	xrgb8888 = cpubuf_to_le32(test, params->xrgb8888, TEST_BUF_SIZE);
453114319699b6 José Expósito     2022-09-26  753  	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, xrgb8888);
453114319699b6 José Expósito     2022-09-26  754  	iosys_map_set_vaddr(&src, xrgb8888);
453114319699b6 José Expósito     2022-09-26  755  
453114319699b6 José Expósito     2022-09-26  756  	drm_fb_xrgb8888_to_xrgb2101010(&dst, &result->dst_pitch, &src, &fb, &params->clip);
7089003304c676 David Gow         2022-10-19 @757  	buf = le32buf_to_cpu(test, buf, dst_size / sizeof(u32));
a52a5451f43bb7 Maíra Canal       2022-10-25  758  	KUNIT_EXPECT_MEMEQ(test, buf, result->expected, dst_size);
453114319699b6 José Expósito     2022-09-26  759  }
453114319699b6 José Expósito     2022-09-26  760  

:::::: The code at line 757 was first introduced by commit
:::::: 7089003304c67658caead22f841840fc4a26b198 drm: tests: Fix a buffer overflow in format_helper_test

:::::: TO: David Gow <davidgow@...gle.com>
:::::: CC: Javier Martinez Canillas <javierm@...hat.com>

-- 
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https://github.com/intel/lkp-tests/wiki