[merged mm-stable] mm-nommu-reject-wrapping-ranges-in-access_remote_vm.patch removed from -mm tree

[merged mm-stable] mm-nommu-reject-wrapping-ranges-in-access_remote_vm.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm/nommu: reject wrapping ranges in access_remote_vm()
has been removed from the -mm tree.  Its filename was
     mm-nommu-reject-wrapping-ranges-in-access_remote_vm.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Anastasios Papagiannis <tasos.papagiannnis@gmail.com>
Subject: mm/nommu: reject wrapping ranges in access_remote_vm()
Date: Wed, 9 Sep 2026 09:42:31 +0300

The NOMMU implementation of access_process_vm() rejects address ranges
whose end wraps around, but access_remote_vm() bypasses this check even
though both functions delegate to __access_remote_vm().

Move the wraparound check into __access_remote_vm() so it applies to both
entry points.

This is originally reported in [1].

Link: https://lore.kernel.org/20260909064231.18693-1-tasos.papagiannnis@gmail.com
Fixes: f55f199b7d76 ("NOMMU: implement access_remote_vm")
Signed-off-by: Anastasios Papagiannis <tasos.papagiannnis@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Closes: https://lore.kernel.org/bpf/4ef240a5bea36ff84df9589671367832860795159386a4c8fba546a0fa8b786f@mail.kernel.org/ [1]
Reviewed-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Hajime Tazaki <thehajime@gmail.com>
Cc: <stable@vger.kernel.org>
---

 mm/nommu.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/mm/nommu.c~mm-nommu-reject-wrapping-ranges-in-access_remote_vm
+++ a/mm/nommu.c
@@ -1674,6 +1674,9 @@ static int __access_remote_vm(struct mm_
 	struct vm_area_struct *vma;
 	int write = gup_flags & FOLL_WRITE;
 
+	if (addr + len < addr)
+		return 0;
+
 	if (mmap_read_lock_killable(mm))
 		return 0;
 
@@ -1727,9 +1730,6 @@ int access_process_vm(struct task_struct
 {
 	struct mm_struct *mm;
 
-	if (addr + len < addr)
-		return 0;
-
 	mm = get_task_mm(tsk);
 	if (!mm)
 		return 0;
_

Patches currently in -mm which might be from tasos.papagiannnis@gmail.com are