From: keith.busch@intel.com (Keith Busch) Date: Wed, 18 Nov 2015 16:33:08 -0700 Subject: [PATCH] NVMe: Fix possible arithmetic overflow for max segments Message-ID: <1447889588-11353-1-git-send-email-keith.busch@intel.com> Reported-by: Paul Grabinar Signed-off-by: Keith Busch --- drivers/nvme/host/pci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 8187df2..394fd16 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -2268,7 +2268,7 @@ static void nvme_alloc_ns(struct nvme_dev *dev, unsigned nsid) if (dev->max_hw_sectors) { blk_queue_max_hw_sectors(ns->queue, dev->max_hw_sectors); blk_queue_max_segments(ns->queue, - ((dev->max_hw_sectors << 9) / dev->page_size) + 1); + (dev->max_hw_sectors / (dev->page_size >> 9)) + 1); } if (dev->stripe_size) blk_queue_chunk_sectors(ns->queue, dev->stripe_size >> 9); -- 2.6.2.307.g37023ba