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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 <[email protected]>
Acked-by: Christoph Lameter <[email protected]>
Cc: Minchan Kim <[email protected]>
Cc: KAMEZAWA Hiroyuki <[email protected]>
Cc: Mel Gorman <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Gleb Natapov 2010-10-26 14:22:07 -07:00 • committed by Linus Torvalds
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;
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 mm_struct *mm, unsigned long nr_pages,
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);