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| 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 11:18:26 -0700 |
| commit | 1725aa78848dd382a9705146131d0b10164650ba (patch) | |
| tree | f7ff0349424d3c5a3e8eb6057641c8e05514e663 /kernel/sysctl.c | |
| parent | bc3e3ff65a157cc6ef43e2279cfac6cf7cdcbbbe (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/sysctl.c')
0 files changed, 0 insertions, 0 deletions