[xen master] Arm: tighten translate_get_page()

[patchbot@xxxxxxx]

commit af6fc34e201c519a910aa4d34570ac3d7b13ec9b
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Wed Feb 18 10:17:39 2026 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Wed Feb 18 10:17:39 2026 +0100

    Arm: tighten translate_get_page()
    
    Permitting writes when the P2M type says "read-only" can't be correct.
    
    Fixes: 1661158723a ("xen/arm: Extend copy_to_guest to support copying 
from/to guest physical address")
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Reviewed-by: Michal Orzel <michal.orzel@xxxxxxx>
---
 xen/arch/arm/guestcopy.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/arm/guestcopy.c b/xen/arch/arm/guestcopy.c
index 497e785ec4..fdb06422b8 100644
--- a/xen/arch/arm/guestcopy.c
+++ b/xen/arch/arm/guestcopy.c
@@ -44,7 +44,7 @@ static struct page_info *translate_get_page(copy_info_t info, 
uint64_t addr,
     if ( !page )
         return NULL;
 
-    if ( !p2m_is_ram(p2mt) )
+    if ( write ? p2mt != p2m_ram_rw : !p2m_is_ram(p2mt) )
     {
         put_page(page);
         return NULL;
--
generated by git-patchbot for /home/xen/git/xen.git#master