[openeuler:OLK-5.10 2516/2516] security/integrity/ima/ima_template_lib.c:102:44: sparse: sparse: cast to restricted __le16

3 Dec 2024

      tree:   https://gitee.com/openeuler/kernel.git OLK-5.10
head:   020e0507954f21291b7b3a0a280128270a0d8959
commit: 2c0768b2f0838b4a365d958abd751773e795e987 [2516/2516] ima: Add ima_show_template_uint() template library function
config: x86_64-randconfig-121-20241203 (https://download.01.org/0day-ci/archive/20241203/202412031310.oFwEBFj9-lkp@i...)
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/20241203/202412031310.oFwEBFj9-lkp@i...)

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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202412031310.oFwEBFj9-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
...
...
security/integrity/ima/ima_template_lib.c:102:44: sparse: sparse: cast to restricted __le16
   security/integrity/ima/ima_template_lib.c:109:44: sparse: sparse: cast to restricted __le32
security/integrity/ima/ima_template_lib.c:116:44: sparse: sparse: cast to restricted __le64
   security/integrity/ima/ima_template_lib.c:137:60: sparse: sparse: restricted __le32 degrades to integer
   security/integrity/ima/ima_template_lib.c:232:49: sparse: sparse: cast to restricted __le32
vim +102 security/integrity/ima/ima_template_lib.c

    66	
    67	static void ima_show_template_data_ascii(struct seq_file *m,
    68						 enum ima_show_type show,
    69						 enum data_formats datafmt,
    70						 struct ima_field_data *field_data)
    71	{
    72		u8 *buf_ptr = field_data->data;
    73		u32 buflen = field_data->len;
    74	
    75		switch (datafmt) {
    76		case DATA_FMT_DIGEST_WITH_ALGO:
    77			buf_ptr = strnchr(field_data->data, buflen, ':');
    78			if (buf_ptr != field_data->data)
    79				seq_printf(m, "%s", field_data->data);
    80	
    81			/* skip ':' and '\0' */
    82			buf_ptr += 2;
    83			buflen -= buf_ptr - field_data->data;
    84			fallthrough;
    85		case DATA_FMT_DIGEST:
    86		case DATA_FMT_HEX:
    87			if (!buflen)
    88				break;
    89			ima_print_digest(m, buf_ptr, buflen);
    90			break;
    91		case DATA_FMT_STRING:
    92			seq_printf(m, "%s", buf_ptr);
    93			break;
    94		case DATA_FMT_UINT:
    95			switch (field_data->len) {
    96			case sizeof(u8):
    97				seq_printf(m, "%u", *(u8 *)buf_ptr);
    98				break;
    99			case sizeof(u16):
   100				if (ima_canonical_fmt)
   101					seq_printf(m, "%u",
...
102						   le16_to_cpu(*(u16 *)buf_ptr));
   103				else
   104					seq_printf(m, "%u", *(u16 *)buf_ptr);
   105				break;
   106			case sizeof(u32):
   107				if (ima_canonical_fmt)
   108					seq_printf(m, "%u",
   109						   le32_to_cpu(*(u32 *)buf_ptr));
   110				else
   111					seq_printf(m, "%u", *(u32 *)buf_ptr);
   112				break;
   113			case sizeof(u64):
   114				if (ima_canonical_fmt)
   115					seq_printf(m, "%llu",
116						   le64_to_cpu(*(u64 *)buf_ptr));
   117				else
   118					seq_printf(m, "%llu", *(u64 *)buf_ptr);
   119				break;
   120			default:
   121				break;
   122			}
   123		default:
   124			break;
   125		}
   126	}
   127
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