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From: Alexander Duyck <alexander.h.duyck@linux.intel.com>
To: dan.j.williams@intel.com, linux-nvdimm@lists.01.org
Cc: alexander.h.duyck@linux.intel.com, zwisler@kernel.org
Subject: [nvdimm PATCH 2/6] nvdimm: Sanity check labeloff
Date: Wed, 10 Oct 2018 16:38:41 -0700	[thread overview]
Message-ID: <20181010233830.12228.1116.stgit@localhost.localdomain> (raw)
In-Reply-To: <20181010233428.12228.26106.stgit@localhost.localdomain>

This patch adds validation for the labeloff field in the indexes.

Signed-off-by: Alexander Duyck <alexander.h.duyck@linux.intel.com>
---
 drivers/nvdimm/label.c |    7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c
index 1d28cd656536..1f5842509dbc 100644
--- a/drivers/nvdimm/label.c
+++ b/drivers/nvdimm/label.c
@@ -183,6 +183,13 @@ static int __nd_label_validate(struct nvdimm_drvdata *ndd)
 					__le64_to_cpu(nsindex[i]->otheroff));
 			continue;
 		}
+		if (__le64_to_cpu(nsindex[i]->labeloff)
+				!= 2 * sizeof_namespace_index(ndd)) {
+			dev_dbg(dev, "nsindex%d labeloff: %#llx invalid\n",
+					i, (unsigned long long)
+					__le64_to_cpu(nsindex[i]->labeloff));
+			continue;
+		}
 
 		size = __le64_to_cpu(nsindex[i]->mysize);
 		if (size > sizeof_namespace_index(ndd)

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  parent reply	other threads:[~2018-10-10 23:38 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-10 23:36 [nvdimm PATCH 0/6] Label initialization time optimizations Alexander Duyck
2018-10-10 23:38 ` [nvdimm PATCH 1/6] libnvdimm, dimm: Maximize label transfer size Alexander Duyck
2018-10-10 23:38 ` Alexander Duyck [this message]
2018-10-10 23:38 ` [nvdimm PATCH 3/6] nvdimm: Clarify comment in sizeof_namespace_index Alexander Duyck
2018-10-10 23:39 ` [nvdimm PATCH 4/6] nvdimm: Remove empty if statement Alexander Duyck
2018-10-10 23:39 ` [nvdimm PATCH 5/6] nvdimm: Split label init out from the logic for getting config data Alexander Duyck
2018-10-10 23:39 ` [nvdimm PATCH 6/6] nvdimm: Use namespace index data to reduce number of label reads needed Alexander Duyck
2018-10-12  1:35   ` Dan Williams
2018-10-11  4:48 ` [nvdimm PATCH 0/6] Label initialization time optimizations Dan Williams
2018-10-12 15:36 ` Kani, Toshi

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