[PATCH] powerpc/kexec_file: Use inclusive range checks for excluded memory
Thorsten Blum <[email protected]>
| Newsgroups | gmane.linux.ports.ppc.embedded,gmane.linux.kernel |
|---|---|
| Message-ID | <[email protected]> |
arch_check_excluded_range() checks if a kexec segment overlaps an
excluded memory range.
Both ranges use inclusive end addresses, but the overlap check uses
exclusive comparisons. This skips ranges with start == ->ranges[i].end
or end == ->ranges[i].start. Use inclusive comparisons instead.
Fixes: 6e5250eaa665 ("powerpc/crash: use generic APIs to locate memory hole for kdump")
Signed-off-by: Thorsten Blum <[email protected]>
---
Sashiko found this issue when reviewing another patch:
https://sashiko.dev/#/patchset/20260809162403.18142-2-thorsten.blum%40linux.dev
---
arch/powerpc/kexec/file_load_64.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/kexec/file_load_64.c b/arch/powerpc/kexec/file_load_64.c
index 40b74cc4ed3e..32e2b7412a9f 100644
--- a/arch/powerpc/kexec/file_load_64.c
+++ b/arch/powerpc/kexec/file_load_64.c
@@ -58,7 +58,7 @@ int arch_check_excluded_range(struct kimage *image, unsigned long start,
emem = image->arch.exclude_ranges;
for (i = 0; i < emem->nr_ranges; i++)
- if (start < emem->ranges[i].end && end > emem->ranges[i].start)
+ if (start <= emem->ranges[i].end && end >= emem->ranges[i].start)
return 1;
return 0;