arch/x86/kernel/crash.c:205 elf_header_exclude_ranges() warn: we never enter this loop

arch/x86/kernel/crash.c:205 elf_header_exclude_ranges() warn: we never enter this loop

[kernel test robot]

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
CC: linux-kernel@vger.kernel.org
TO: Jiri Bohac <jbohac@suse.cz>
CC: Andrew Morton <akpm@linux-foundation.org>
CC: Linux Memory Management List <linux-mm@kvack.org>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   ea1013c1539270e372fc99854bc6e4d94eaeff66
commit: bf8be1c3610829056e5445282ca92ca7b7a4ba7b x86: implement crashkernel cma reservation
date:   5 months ago
:::::: branch date: 2 days ago
:::::: commit date: 5 months ago
config: i386-randconfig-141-20251219 (https://download.01.org/0day-ci/archive/20251219/202512190414.AOXweMca-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0

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>
| Reported-by: Dan Carpenter <error27@gmail.com>
| Closes: https://lore.kernel.org/r/202512190414.AOXweMca-lkp@intel.com/

smatch warnings:
arch/x86/kernel/crash.c:205 elf_header_exclude_ranges() warn: we never enter this loop

vim +205 arch/x86/kernel/crash.c

dd5f726076cc76 Vivek Goyal     2014-08-08  179  
dd5f726076cc76 Vivek Goyal     2014-08-08  180  /*
dd5f726076cc76 Vivek Goyal     2014-08-08  181   * Look for any unwanted ranges between mstart, mend and remove them. This
8d5f894a3108ac AKASHI Takahiro 2018-04-13  182   * might lead to split and split ranges are put in cmem->ranges[] array
dd5f726076cc76 Vivek Goyal     2014-08-08  183   */
8d5f894a3108ac AKASHI Takahiro 2018-04-13  184  static int elf_header_exclude_ranges(struct crash_mem *cmem)
dd5f726076cc76 Vivek Goyal     2014-08-08  185  {
dd5f726076cc76 Vivek Goyal     2014-08-08  186  	int ret = 0;
bf8be1c3610829 Jiri Bohac      2025-06-12  187  	int i;
dd5f726076cc76 Vivek Goyal     2014-08-08  188  
7c321eb2b843bf Lianbo Jiang    2019-11-08  189  	/* Exclude the low 1M because it is always reserved */
61bb219f9d83c1 Yuntao Wang     2024-01-02  190  	ret = crash_exclude_mem_range(cmem, 0, SZ_1M - 1);
7c321eb2b843bf Lianbo Jiang    2019-11-08  191  	if (ret)
7c321eb2b843bf Lianbo Jiang    2019-11-08  192  		return ret;
7c321eb2b843bf Lianbo Jiang    2019-11-08  193  
dd5f726076cc76 Vivek Goyal     2014-08-08  194  	/* Exclude crashkernel region */
babac4a84a8884 AKASHI Takahiro 2018-04-13  195  	ret = crash_exclude_mem_range(cmem, crashk_res.start, crashk_res.end);
dd5f726076cc76 Vivek Goyal     2014-08-08  196  	if (ret)
dd5f726076cc76 Vivek Goyal     2014-08-08  197  		return ret;
dd5f726076cc76 Vivek Goyal     2014-08-08  198  
9eff303725da65 Borislav Petkov 2019-11-14  199  	if (crashk_low_res.end)
babac4a84a8884 AKASHI Takahiro 2018-04-13  200  		ret = crash_exclude_mem_range(cmem, crashk_low_res.start,
babac4a84a8884 AKASHI Takahiro 2018-04-13  201  					      crashk_low_res.end);
bf8be1c3610829 Jiri Bohac      2025-06-12  202  	if (ret)
bf8be1c3610829 Jiri Bohac      2025-06-12  203  		return ret;
dd5f726076cc76 Vivek Goyal     2014-08-08  204  
bf8be1c3610829 Jiri Bohac      2025-06-12 @205  	for (i = 0; i < crashk_cma_cnt; ++i) {
bf8be1c3610829 Jiri Bohac      2025-06-12  206  		ret = crash_exclude_mem_range(cmem, crashk_cma_ranges[i].start,
bf8be1c3610829 Jiri Bohac      2025-06-12  207  					      crashk_cma_ranges[i].end);
bf8be1c3610829 Jiri Bohac      2025-06-12  208  		if (ret)
dd5f726076cc76 Vivek Goyal     2014-08-08  209  			return ret;
dd5f726076cc76 Vivek Goyal     2014-08-08  210  	}
dd5f726076cc76 Vivek Goyal     2014-08-08  211  
bf8be1c3610829 Jiri Bohac      2025-06-12  212  	return 0;
bf8be1c3610829 Jiri Bohac      2025-06-12  213  }
bf8be1c3610829 Jiri Bohac      2025-06-12  214  

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