+ of-kexec-refactor-ima_get_kexec_buffer-to-use-ima_validate_range.patch added to mm-nonmm-unstable branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: of/kexec: refactor ima_get_kexec_buffer() to use ima_validate_range()
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     of-kexec-refactor-ima_get_kexec_buffer-to-use-ima_validate_range.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/of-kexec-refactor-ima_get_kexec_buffer-to-use-ima_validate_range.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: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com>
Subject: of/kexec: refactor ima_get_kexec_buffer() to use ima_validate_range()
Date: Tue, 30 Dec 2025 22:16:08 -0800

Refactor the OF/DT ima_get_kexec_buffer() to use a generic helper to
validate the address range.  No functional change intended.

Link: https://lkml.kernel.org/r/20251231061609.907170-3-harshit.m.mogalapalli@oracle.com
Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com>
Reviewed-by: Mimi Zohar <zohar@linux.ibm.com>
Cc: Alexander Graf <graf@amazon.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Baoquan He <bhe@redhat.com>
Cc: Borislav Betkov <bp@alien8.de>
Cc: guoweikang <guoweikang.kernel@gmail.com>
Cc: Henry Willard <henry.willard@oracle.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Bohac <jbohac@suse.cz>
Cc: Joel Granados <joel.granados@kernel.org>
Cc: Jonathan McDowell <noodles@fb.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Paul Webb <paul.x.webb@oracle.com>
Cc: Sohil Mehta <sohil.mehta@intel.com>
Cc: Sourabh Jain <sourabhjain@linux.ibm.com>
Cc: Thomas Gleinxer <tglx@linutronix.de>
Cc: Yifei Liu <yifei.l.liu@oracle.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/of/kexec.c |   15 +++------------
 1 file changed, 3 insertions(+), 12 deletions(-)

--- a/drivers/of/kexec.c~of-kexec-refactor-ima_get_kexec_buffer-to-use-ima_validate_range
+++ a/drivers/of/kexec.c
@@ -128,7 +128,6 @@ int __init ima_get_kexec_buffer(void **a
 {
 	int ret, len;
 	unsigned long tmp_addr;
-	unsigned long start_pfn, end_pfn;
 	size_t tmp_size;
 	const void *prop;
 
@@ -144,17 +143,9 @@ int __init ima_get_kexec_buffer(void **a
 	if (!tmp_size)
 		return -ENOENT;
 
-	/*
-	 * Calculate the PFNs for the buffer and ensure
-	 * they are with in addressable memory.
-	 */
-	start_pfn = PHYS_PFN(tmp_addr);
-	end_pfn = PHYS_PFN(tmp_addr + tmp_size - 1);
-	if (!page_is_ram(start_pfn) || !page_is_ram(end_pfn)) {
-		pr_warn("IMA buffer at 0x%lx, size = 0x%zx beyond memory\n",
-			tmp_addr, tmp_size);
-		return -EINVAL;
-	}
+	ret = ima_validate_range(tmp_addr, tmp_size);
+	if (ret)
+		return ret;
 
 	*addr = __va(tmp_addr);
 	*size = tmp_size;
_

Patches currently in -mm which might be from harshit.m.mogalapalli@oracle.com are

ima-verify-the-previous-kernels-ima-buffer-lies-in-addressable-ram.patch
of-kexec-refactor-ima_get_kexec_buffer-to-use-ima_validate_range.patch
x86-kexec-add-a-sanity-check-on-previous-kernels-ima-kexec-buffer.patch