pmem_attach_disk() calls nvdimm_badblocks_populate() with resource range uninitialized in the case of raw mode. This leads the pmem driver to hit MCE despite of ARS reporting the range bad. Initialize 'bb_res' for raw mode. Fixes: e8d513483300 ("memremap: change devm_memremap_pages interface to use struct dev_pagemap") Signed-off-by: Toshi Kani <toshi.kani(a)hpe.com&gt; Cc: Christoph Hellwig <hch(a)lst.de&gt; Cc: Dan Williams <dan.j.williams(a)intel.com&gt; Cc: <stable(a)vger.kernel.org&gt; --- 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 9d714926ecf5..2d7875209bce 100644 --- a/drivers/nvdimm/pmem.c +++ b/drivers/nvdimm/pmem.c @@ -367,9 +367,11 @@ 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, res, sizeof(bb_res)); + } /* * At release time the queue must be frozen before