linux-kernel - [PATCH] libnvdimm, pmem: Fix badblocks population for 'raw' namespaces

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Date:   Thu, 04 Oct 2018 16:56:37 -0700
From:   Dan Williams <dan.j.williams@...el.com>
To:     linux-nvdimm@...ts.01.org
Cc:     stable@...r.kernel.org, Christoph Hellwig <hch@....de>,
        Jacek Zloch <jacek.zloch@...el.com>,
        Krzysztof Rusocki <krzysztof.rusocki@...el.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] libnvdimm,
 pmem: Fix badblocks population for 'raw' namespaces

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>
Signed-off-by: Dan Williams <dan.j.williams@...el.com>
---
 drivers/nvdimm/pmem.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index 6071e2942053..2082ae01b9c8 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -421,9 +421,11 @@ static int pmem_attach_disk(struct device *dev,
 		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