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

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

[Dan Williams]

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@vger.kernel.org>
Cc: Christoph Hellwig <hch@lst.de>
Reported-by: Jacek Zloch <jacek.zloch@intel.com>
Reported-by: Krzysztof Rusocki <krzysztof.rusocki@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.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

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Re: [PATCH] libnvdimm, pmem: Fix badblocks population for 'raw' namespaces

[Verma, Vishal L]

On Thu, 2018-10-04 at 16:56 -0700, Dan Williams wrote:
> 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@vger.kernel.org>
> Cc: Christoph Hellwig <hch@lst.de>
> Reported-by: Jacek Zloch <jacek.zloch@intel.com>
> Reported-by: Krzysztof Rusocki <krzysztof.rusocki@intel.com>
> Signed-off-by: Dan Williams <dan.j.williams@intel.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));
> +	}


Good find!
Reviewed-by: Vishal Verma <vishal.l.verma@intel.com>
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