diff options
| author | Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> | 2014-06-23 13:22:03 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-07-09 11:21:28 -0700 |
| commit | fafacf16ffa48065f69657fe036a2ebfb25edbde (patch) | |
| tree | 38824bbdbf6a2c9fbfd0729fe1fe9f0006d89474 /kernel | |
| parent | e50eba3c09f636933ad01ad8e51f7d6d88890b88 (diff) | |
hugetlb: fix copy_hugetlb_page_range() to handle migration/hwpoisoned entry
commit 4a705fef986231a3e7a6b1a6d3c37025f021f49f upstream.
There's a race between fork() and hugepage migration, as a result we try
to "dereference" a swap entry as a normal pte, causing kernel panic.
The cause of the problem is that copy_hugetlb_page_range() can't handle
"swap entry" family (migration entry and hwpoisoned entry) so let's fix
it.
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Acked-by: Hugh Dickins <hughd@google.com>
Cc: Christoph Lameter <cl@linux.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions