The patch titled
Subject: mm/memory.c: actually remap enough memory
has been removed from the -mm tree. Its filename was
mm-actually-remap-enough-memory.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Grazvydas Ignotas <nota...@gmail.com>
Subject: mm/memory.c: actually remap enough memory
For whatever reason, generic_access_phys() only remaps one page, but
actually allows to access arbitrary size. It's quite easy to trigger
large reads, like printing out large structure with gdb, which leads to a
crash. Fix it by remapping correct size.
Fixes: 28b2ee20c7cb ("access_process_vm device memory infrastructure")
Signed-off-by: Grazvydas Ignotas <nota...@gmail.com>
Cc: Rik van Riel <r...@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <a...@linux-foundation.org>
---
mm/memory.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/memory.c~mm-actually-remap-enough-memory mm/memory.c
--- a/mm/memory.c~mm-actually-remap-enough-memory
+++ a/mm/memory.c
@@ -3462,7 +3462,7 @@ int generic_access_phys(struct vm_area_s
if (follow_phys(vma, addr, write, &prot, &phys_addr))
return -EINVAL;
- maddr = ioremap_prot(phys_addr, PAGE_SIZE, prot);
+ maddr = ioremap_prot(phys_addr, PAGE_ALIGN(len + offset), prot);
if (write)
memcpy_toio(maddr + offset, buf, len);
else
_
Patches currently in -mm which might be from nota...@gmail.com are
origin.patch
--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
