linux-kernel - [PATCH 4.18 213/350] libnvdimm, pmem: Fix badblocks population for raw namespaces

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Date:   Sun, 11 Nov 2018 14:21:17 -0800
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Christoph Hellwig <hch@....de>,
        Jacek Zloch <jacek.zloch@...el.com>,
        Krzysztof Rusocki <krzysztof.rusocki@...el.com>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Dan Williams <dan.j.williams@...el.com>
Subject: [PATCH 4.18 213/350] libnvdimm, pmem: Fix badblocks population for raw namespaces

4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Williams <dan.j.williams@...el.com>

commit 91ed7ac444ef749603a95629a5ec483988c4f14b upstream.

The driver is only initializing bb_res in the devm_memremap_pages()
paths, but the raw namespace case is passing an uninitialized bb_res to
nvdimm_badblocks_populate().

Fixes: e8d513483300 ("memremap: change devm_memremap_pages interface...")
Cc: <stable@...r.kernel.org>
Cc: Christoph Hellwig <hch@....de>
Reported-by: Jacek Zloch <jacek.zloch@...el.com>
Reported-by: Krzysztof Rusocki <krzysztof.rusocki@...el.com>
Reviewed-by: Vishal Verma <vishal.l.verma@...el.com>
Signed-off-by: Dan Williams <dan.j.williams@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/nvdimm/pmem.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -393,9 +393,11 @@ static int pmem_attach_disk(struct devic
 		addr = devm_memremap_pages(dev, &pmem->pgmap);
 		pmem->pfn_flags |= PFN_MAP;
 		memcpy(&bb_res, &pmem->pgmap.res, sizeof(bb_res));
-	} else
+	} else {
 		addr = devm_memremap(dev, pmem->phys_addr,
 				pmem->size, ARCH_MEMREMAP_PMEM);
+		memcpy(&bb_res, &nsio->res, sizeof(bb_res));
+	}
 
 	/*
 	 * At release time the queue must be frozen before