The patch titled
Subject: kexec_core: fix the assignment to kimage->control_page
has been added to the -mm mm-nonmm-unstable branch. Its filename is
kexec_core-fix-the-assignment-to-kimage-control_page.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/kexec_core-fix-the-assignment-to-kimage-control_page.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Yuntao Wang <ytcoode@xxxxxxxxx>
Subject: kexec_core: fix the assignment to kimage->control_page
Date: Thu, 21 Dec 2023 12:23:08 +0800
image->control_page represents the starting address for allocating the
next control page, while hole_end represents the address of the last valid
byte of the currently allocated control page.
Therefore, after successfully allocating a control page,
image->control_page should be updated to `hole_end + 1`, rather than
hole_end.
Link: https://lkml.kernel.org/r/20231221042308.11076-1-ytcoode@xxxxxxxxx
Signed-off-by: Yuntao Wang <ytcoode@xxxxxxxxx>
Cc: Baoquan He <bhe@xxxxxxxxxx>
Cc: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/kexec_core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/kernel/kexec_core.c~kexec_core-fix-the-assignment-to-kimage-control_page
+++ a/kernel/kexec_core.c
@@ -457,7 +457,7 @@ static struct page *kimage_alloc_crash_c
/* If I don't overlap any segments I have found my hole! */
if (i == image->nr_segments) {
pages = pfn_to_page(hole_start >> PAGE_SHIFT);
- image->control_page = hole_end;
+ image->control_page = hole_end + 1;
break;
}
}
_
Patches currently in -mm which might be from ytcoode@xxxxxxxxx are
x86-crash-remove-the-unused-image-parameter-from-prepare_elf_headers.patch
x86-crash-use-sz_1m-macro-instead-of-hardcoded-value.patch
crash_core-fix-and-simplify-the-logic-of-crash_exclude_mem_range.patch
x86-crash-fix-potential-cmem-ranges-array-overflow.patch
crash_core-optimize-crash_exclude_mem_range.patch
kexec-modify-the-meaning-of-the-end-parameter-in-kimage_is_destination_range.patch
kexec_file-fix-incorrect-temp_start-value-in-locate_mem_hole_top_down.patch
x86-kexec-use-pr_err-instead-of-kexec_dprintk-when-an-error-occurs.patch
x86-kexec-fix-incorrect-argument-passed-to-kexec_dprintk.patch
x86-kexec-fix-incorrect-end-address-passed-to-kernel_ident_mapping_init.patch
kexec_core-fix-the-assignment-to-kimage-control_page.patch
