The patch titled
Subject: mm: remap_file_pages: grab file ref to prevent race while mmaping
has been removed from the -mm tree. Its filename was
mm-replace-remap_file_pages-syscall-with-emulation-fix-3.patch
This patch was dropped because it was folded into mm-replace-remap_file_pages-syscall-with-emulation.patch
------------------------------------------------------
From: Sasha Levin <sasha.levin@xxxxxxxxxx>
Subject: mm: remap_file_pages: grab file ref to prevent race while mmaping
A file reference should be held while a file is mmaped, otherwise it might
be freed while being used.
Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx>
Suggested-by: Hugh Dickins <hughd@xxxxxxxxxx>
Acked-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/mmap.c | 3 +++
1 file changed, 3 insertions(+)
diff -puN mm/mmap.c~mm-replace-remap_file_pages-syscall-with-emulation-fix-3 mm/mmap.c
--- a/mm/mmap.c~mm-replace-remap_file_pages-syscall-with-emulation-fix-3
+++ a/mm/mmap.c
@@ -2616,6 +2616,7 @@ SYSCALL_DEFINE5(remap_file_pages, unsign
struct vm_area_struct *vma;
unsigned long populate = 0;
unsigned long ret = -EINVAL;
+ struct file *file;
pr_warn_once("%s (%d) uses deprecated remap_file_pages() syscall. "
"See Documentation/vm/remap_file_pages.txt.\n",
@@ -2659,8 +2660,10 @@ SYSCALL_DEFINE5(remap_file_pages, unsign
munlock_vma_pages_range(vma, start, start + size);
}
+ file = get_file(vma->vm_file);
ret = do_mmap_pgoff(vma->vm_file, start, size,
prot, flags, pgoff, &populate);
+ fput(file);
out:
up_write(&mm->mmap_sem);
if (populate)
_
Patches currently in -mm which might be from sasha.levin@xxxxxxxxxx are
origin.patch
vmstat-on-demand-vmstat-workers-v8-fix-2.patch
mm-introduce-do_shared_fault-and-drop-do_fault-fix-fix.patch
do_shared_fault-check-that-mmap_sem-is-held.patch
linux-next.patch
mm-replace-remap_file_pages-syscall-with-emulation.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
