From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:42716 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753496AbdK0Qam (ORCPT ); Mon, 27 Nov 2017 11:30:42 -0500 Subject: Patch "libnvdimm, namespace: fix label initialization to use valid seq numbers" has been added to the 4.14-stable tree To: dan.j.williams@intel.com, gregkh@linuxfoundation.org, juston.li@intel.com Cc: , From: Date: Mon, 27 Nov 2017 17:30:32 +0100 Message-ID: <151180023219246@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled libnvdimm, namespace: fix label initialization to use valid seq numbers to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: libnvdimm-namespace-fix-label-initialization-to-use-valid-seq-numbers.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From b18d4b8a25af6fe83d7692191d6ff962ea611c4f Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Tue, 26 Sep 2017 11:41:28 -0700 Subject: libnvdimm, namespace: fix label initialization to use valid seq numbers From: Dan Williams commit b18d4b8a25af6fe83d7692191d6ff962ea611c4f upstream. The set of valid sequence numbers is {1,2,3}. The specification indicates that an implementation should consider 0 a sign of a critical error: UEFI 2.7: 13.19 NVDIMM Label Protocol Software never writes the sequence number 00, so a correctly check-summed Index Block with this sequence number probably indicates a critical error. When software discovers this case it treats it as an invalid Index Block indication. While the expectation is that the invalid block is just thrown away, the Robustness Principle says we should fix this to make both sequence numbers valid. Fixes: f524bf271a5c ("libnvdimm: write pmem label set") Reported-by: Juston Li Signed-off-by: Dan Williams Signed-off-by: Greg Kroah-Hartman --- drivers/nvdimm/label.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/nvdimm/label.c +++ b/drivers/nvdimm/label.c @@ -1050,7 +1050,7 @@ static int init_labels(struct nd_mapping nsindex = to_namespace_index(ndd, 0); memset(nsindex, 0, ndd->nsarea.config_size); for (i = 0; i < 2; i++) { - int rc = nd_label_write_index(ndd, i, i*2, ND_NSINDEX_INIT); + int rc = nd_label_write_index(ndd, i, 3 - i, ND_NSINDEX_INIT); if (rc) return rc; Patches currently in stable-queue which might be from dan.j.williams@intel.com are queue-4.14/libnvdimm-dimm-clear-locked-status-on-successful-dimm-enable.patch queue-4.14/libnvdimm-pfn-make-resource-attribute-only-readable-by-root.patch queue-4.14/libnvdimm-region-make-resource-attribute-only-readable-by-root.patch queue-4.14/dax-fix-pmd-faults-on-zero-length-files.patch queue-4.14/libnvdimm-namespace-make-resource-attribute-only-readable-by-root.patch queue-4.14/dax-fix-general-protection-fault-in-dax_alloc_inode.patch queue-4.14/libnvdimm-namespace-fix-label-initialization-to-use-valid-seq-numbers.patch