The patch titled
mm: fix error reporting in move_pages() syscall
has been added to the -mm tree. Its filename is
mm-fix-error-reporting-in-move_pages-syscall.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: mm: fix error reporting in move_pages() syscall
From: Gleb Natapov <gleb@xxxxxxxxxx>
The vma returned by find_vma does not necessarily include the target
address. If this happens the code tries to follow a page outside of any
vma and returns ENOENT instead of EFAULT.
Signed-off-by: Gleb Natapov <gleb@xxxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxxxxxxxxxxxxx>
Cc: Minchan Kim <minchan.kim@xxxxxxxxx>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Cc: Mel Gorman <mel@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/migrate.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff -puN mm/migrate.c~mm-fix-error-reporting-in-move_pages-syscall mm/migrate.c
--- a/mm/migrate.c~mm-fix-error-reporting-in-move_pages-syscall
+++ a/mm/migrate.c
@@ -1037,7 +1037,7 @@ static int do_move_page_to_node_array(st
err = -EFAULT;
vma = find_vma(mm, pp->addr);
- if (!vma || !vma_migratable(vma))
+ if (!vma || pp->addr < vma->vm_start || !vma_migratable(vma))
goto set_status;
page = follow_page(vma, pp->addr, FOLL_GET);
@@ -1204,7 +1204,7 @@ static void do_pages_stat_array(struct m
int err = -EFAULT;
vma = find_vma(mm, addr);
- if (!vma)
+ if (!vma || addr < vma->vm_start)
goto set_status;
page = follow_page(vma, addr, 0);
_
Patches currently in -mm which might be from gleb@xxxxxxxxxx are
linux-next.patch
mm-fix-error-reporting-in-move_pages-syscall.patch
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