[linux-next:master 2042/2633] kernel/crash_core.c:303 crash_exclude_core_ranges() warn: we never enter this loop

[linux-next:master 2042/2633] kernel/crash_core.c:303 crash_exclude_core_ranges() warn: we never enter this loop

[kernel test robot]

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
TO: Jinjie Ruan <ruanjinjie@huawei.com>
CC: "Mike Rapoport (Microsoft)" <rppt@kernel.org>
CC: Sourabh Jain <sourabhjain@linux.ibm.com>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   4f441960e691d37c880d2cc004de06bb5b6bd5e4
commit: 5beabef0cffaa1ea6e27e85dbd526b7a28e0e7c7 [2042/2633] crash: Add crash_prepare_headers() to exclude crash kernel memory
:::::: branch date: 15 hours ago
:::::: commit date: 2 days ago
config: sh-randconfig-r072-20260702 (https://download.01.org/0day-ci/archive/20260702/202607021410.VIPCVui0-lkp@intel.com/config)
compiler: sh4-linux-gcc (GCC) 15.2.0
smatch: v0.5.0-9185-gbcc58b9c

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/202607021410.VIPCVui0-lkp@intel.com/

smatch warnings:
kernel/crash_core.c:303 crash_exclude_core_ranges() warn: we never enter this loop

vim +303 kernel/crash_core.c

5beabef0cffaa1e Jinjie Ruan 2026-06-29  287  
5beabef0cffaa1e Jinjie Ruan 2026-06-29  288  static int crash_exclude_core_ranges(struct crash_mem *cmem)
5beabef0cffaa1e Jinjie Ruan 2026-06-29  289  {
5beabef0cffaa1e Jinjie Ruan 2026-06-29  290  	int ret, i;
5beabef0cffaa1e Jinjie Ruan 2026-06-29  291  
5beabef0cffaa1e Jinjie Ruan 2026-06-29  292  	/* Exclude crashkernel region */
5beabef0cffaa1e Jinjie Ruan 2026-06-29  293  	ret = crash_exclude_mem_range(cmem, crashk_res.start, crashk_res.end);
5beabef0cffaa1e Jinjie Ruan 2026-06-29  294  	if (ret)
5beabef0cffaa1e Jinjie Ruan 2026-06-29  295  		return ret;
5beabef0cffaa1e Jinjie Ruan 2026-06-29  296  
5beabef0cffaa1e Jinjie Ruan 2026-06-29  297  	if (crashk_low_res.end) {
5beabef0cffaa1e Jinjie Ruan 2026-06-29  298  		ret = crash_exclude_mem_range(cmem, crashk_low_res.start, crashk_low_res.end);
5beabef0cffaa1e Jinjie Ruan 2026-06-29  299  		if (ret)
5beabef0cffaa1e Jinjie Ruan 2026-06-29  300  			return ret;
5beabef0cffaa1e Jinjie Ruan 2026-06-29  301  	}
5beabef0cffaa1e Jinjie Ruan 2026-06-29  302  
5beabef0cffaa1e Jinjie Ruan 2026-06-29 @303  	for (i = 0; i < crashk_cma_cnt; ++i) {
5beabef0cffaa1e Jinjie Ruan 2026-06-29  304  		ret = crash_exclude_mem_range(cmem, crashk_cma_ranges[i].start,
5beabef0cffaa1e Jinjie Ruan 2026-06-29  305  					      crashk_cma_ranges[i].end);
5beabef0cffaa1e Jinjie Ruan 2026-06-29  306  		if (ret)
5beabef0cffaa1e Jinjie Ruan 2026-06-29  307  			return ret;
5beabef0cffaa1e Jinjie Ruan 2026-06-29  308  	}
5beabef0cffaa1e Jinjie Ruan 2026-06-29  309  
5beabef0cffaa1e Jinjie Ruan 2026-06-29  310  	return 0;
5beabef0cffaa1e Jinjie Ruan 2026-06-29  311  }
5beabef0cffaa1e Jinjie Ruan 2026-06-29  312  

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