+ x86-kexec-fix-incorrect-end-address-passed-to-kernel_ident_mapping_init.patch added to mm-nonmm-unstable branch

+ x86-kexec-fix-incorrect-end-address-passed-to-kernel_ident_mapping_init.patch added to mm-nonmm-unstable branch

[Andrew Morton]

The patch titled
     Subject: x86/kexec: fix incorrect end address passed to kernel_ident_mapping_init()
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     x86-kexec-fix-incorrect-end-address-passed-to-kernel_ident_mapping_init.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/x86-kexec-fix-incorrect-end-address-passed-to-kernel_ident_mapping_init.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@gmail.com>
Subject: x86/kexec: fix incorrect end address passed to kernel_ident_mapping_init()
Date: Thu, 21 Dec 2023 18:17:02 +0800

kernel_ident_mapping_init() takes an exclusive memory range [pstart, pend)
where pend is not included in the range, while res represents an inclusive
memory range [start, end] where end is considered part of the range.

Therefore, passing res->end directly to kernel_ident_mapping_init() is
incorrect, the correct end address should be `res->end + 1`.

Link: https://lkml.kernel.org/r/20231221101702.20956-1-ytcoode@gmail.com
Signed-off-by: Yuntao Wang <ytcoode@gmail.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Borislav Petkov (AMD) <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Simon Horman <horms@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 arch/x86/kernel/machine_kexec_64.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/x86/kernel/machine_kexec_64.c~x86-kexec-fix-incorrect-end-address-passed-to-kernel_ident_mapping_init
+++ a/arch/x86/kernel/machine_kexec_64.c
@@ -44,7 +44,7 @@ static int mem_region_callback(struct re
 	struct init_pgtable_data *data = arg;
 
 	return kernel_ident_mapping_init(data->info, data->level4p,
-					 res->start, res->end);
+					 res->start, res->end + 1);
 }
 
 static int
_

Patches currently in -mm which might be from ytcoode@gmail.com 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