From fd90f26cc732b5c0f51140ba0d1f7fd31e8bf910 Mon Sep 17 00:00:00 2001 From: Klaus Jensen Date: Mon, 24 Aug 2020 11:55:46 +0200 Subject: [PATCH] hw/block/nvme: fix endian conversion MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The raw NLB field is a 16 bit value, so use le16_to_cpu instead of le32_to_cpu and cast to uint32_t before incrementing the value to not wrap around. Signed-off-by: Klaus Jensen Reviewed-by: Keith Busch Reviewed-by: Philippe Mathieu-Daudé --- hw/block/nvme.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/hw/block/nvme.c b/hw/block/nvme.c index 59338b4232..158843c14a 100644 --- a/hw/block/nvme.c +++ b/hw/block/nvme.c @@ -645,7 +645,7 @@ static uint16_t nvme_write_zeroes(NvmeCtrl *n, NvmeRequest *req) NvmeRwCmd *rw = (NvmeRwCmd *)&req->cmd; NvmeNamespace *ns = req->ns; uint64_t slba = le64_to_cpu(rw->slba); - uint32_t nlb = le16_to_cpu(rw->nlb) + 1; + uint32_t nlb = (uint32_t)le16_to_cpu(rw->nlb) + 1; uint64_t offset = nvme_l2b(ns, slba); uint32_t count = nvme_l2b(ns, nlb); uint16_t status; @@ -669,7 +669,7 @@ static uint16_t nvme_rw(NvmeCtrl *n, NvmeRequest *req) { NvmeRwCmd *rw = (NvmeRwCmd *)&req->cmd; NvmeNamespace *ns = req->ns; - uint32_t nlb = le32_to_cpu(rw->nlb) + 1; + uint32_t nlb = (uint32_t)le16_to_cpu(rw->nlb) + 1; uint64_t slba = le64_to_cpu(rw->slba); uint64_t data_size = nvme_l2b(ns, nlb);