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-rw-r--r--mm/mempolicy.c14
1 files changed, 9 insertions, 5 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 4ae967bcf954..e08c94170ae4 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -672,7 +672,9 @@ static const struct mm_walk_ops queue_pages_walk_ops = {
* 1 - there is unmovable page, but MPOL_MF_MOVE* & MPOL_MF_STRICT were
* specified.
* 0 - queue pages successfully or no misplaced page.
- * -EIO - there is misplaced page and only MPOL_MF_STRICT was specified.
+ * errno - i.e. misplaced pages with MPOL_MF_STRICT specified (-EIO) or
+ * memory range specified by nodemask and maxnode points outside
+ * your accessible address space (-EFAULT)
*/
static int
queue_pages_range(struct mm_struct *mm, unsigned long start, unsigned long end,
@@ -1286,7 +1288,7 @@ static long do_mbind(unsigned long start, unsigned long len,
flags | MPOL_MF_INVERT, &pagelist);
if (ret < 0) {
- err = -EIO;
+ err = ret;
goto up_out;
}
@@ -1305,10 +1307,12 @@ static long do_mbind(unsigned long start, unsigned long len,
if ((ret > 0) || (nr_failed && (flags & MPOL_MF_STRICT)))
err = -EIO;
- } else
- putback_movable_pages(&pagelist);
-
+ } else {
up_out:
+ if (!list_empty(&pagelist))
+ putback_movable_pages(&pagelist);
+ }
+
up_write(&mm->mmap_sem);
mpol_out:
mpol_put(new);