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mm: fix error reporting in move_pages() syscall

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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@redhat.com>
Acked-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Minchan Kim <minchan.kim@gmail.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Gleb Natapov 2010-10-26 14:22:07 -07:00 committed by Linus Torvalds
parent 66d7dd518a
commit 70384dc6dc
1 changed files with 2 additions and 2 deletions
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4
mm/migrate.c
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@ -1037,7 +1037,7 @@ static int do_move_page_to_node_array(struct mm_struct *mm,
err = -EFAULT; err = -EFAULT;
vma = find_vma(mm, pp->addr); vma = find_vma(mm, pp->addr);
if (!vma || !vma_migratable(vma)) if (!vma || pp->addr < vma->vm_start || !vma_migratable(vma))
goto set_status; goto set_status;
page = follow_page(vma, pp->addr, FOLL_GET); page = follow_page(vma, pp->addr, FOLL_GET);
@ -1204,7 +1204,7 @@ static void do_pages_stat_array(struct mm_struct *mm, unsigned long nr_pages,
int err = -EFAULT; int err = -EFAULT;
vma = find_vma(mm, addr); vma = find_vma(mm, addr);
if (!vma) if (!vma || addr < vma->vm_start)
goto set_status; goto set_status;
page = follow_page(vma, addr, 0); page = follow_page(vma, addr, 0);