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Date: Wed, 10 Jun 2015 15:48:20 +0800 From: Nick Wang <nwang@...e.com> To: philipp.reisner@...bit.com, lars.ellenberg@...bit.com, drbd-dev@...ts.linbit.com Cc: linux-kernel@...r.kernel.org, nwang@...e.com Subject: [PATCH 01/10] drbd: Fix potenial risk of overlap the old history when move history. Fix the potential history overlap when using more than two history uuids. Signed-off-by: Nick Wang <nwang@...e.com> CC: Philipp Reisner <philipp.reisner@...bit.com> CC: Lars Ellenberg <lars.ellenberg@...bit.com> CC: drbd-dev@...ts.linbit.com CC: linux-kernel@...r.kernel.org --- drbd/drbd_main.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drbd/drbd_main.c b/drbd/drbd_main.c index f41aa8a..2ffb569 100644 --- a/drbd/drbd_main.c +++ b/drbd/drbd_main.c @@ -3466,8 +3466,8 @@ void drbd_uuid_move_history(struct drbd_device *device) __must_hold(local) { int i; - for (i = UI_HISTORY_START; i < UI_HISTORY_END; i++) - device->ldev->md.uuid[i+1] = device->ldev->md.uuid[i]; + for (i = UI_HISTORY_END; i > UI_HISTORY_START; i--) + device->ldev->md.uuid[i] = device->ldev->md.uuid[i-1]; } void __drbd_uuid_set(struct drbd_device *device, int idx, u64 val) __must_hold(local) -- 1.8.4.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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