Merge tag 'libnvdimm-for-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm

Pull nvdimm updates from Dave Jiang:
 "This is mostly small cleanups, fixes, and with a change to prevent
  zero-sized namespace exposed to user for nvdimm.

  Summary:

   - kstrtobool() conversion for nvdimm

   - Add REQ_OP_WRITE for virtio_pmem

   - Header files update for of_pmem

   - Restrict zero-sized namespace from being exposed to user

   - Avoid unnecessary endian conversion

   - Fix mem leak in nvdimm pmu

   - Fix dereference after free in nvdimm pmu"

* tag 'libnvdimm-for-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  nvdimm: Fix dereference after free in register_nvdimm_pmu()
  nvdimm: Fix memleak of pmu attr_groups in unregister_nvdimm_pmu()
  nvdimm/pfn_dev: Avoid unnecessary endian conversion
  nvdimm/pfn_dev: Prevent the creation of zero-sized namespaces
  nvdimm: Explicitly include correct DT includes
  virtio_pmem: add the missing REQ_OP_WRITE for flush bio
  nvdimm: Use kstrtobool() instead of strtobool()

Author: torvalds

drivers/nvdimm/namespace_devs.c

@@ -2,6 +2,7 @@
 /*
  * Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
  */
+#include <linux/kstrtox.h>
 #include <linux/module.h>
 #include <linux/device.h>
 #include <linux/sort.h>
@@ -1338,7 +1339,7 @@ static ssize_t force_raw_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t len)
 {
 	bool force_raw;
-	int rc = strtobool(buf, &force_raw);
+	int rc = kstrtobool(buf, &force_raw);
 
 	if (rc)
 		return rc;

drivers/nvdimm/nd_perf.c

@@ -308,8 +308,8 @@ int register_nvdimm_pmu(struct nvdimm_pmu *nd_pmu, struct platform_device *pdev)
 
 	rc = perf_pmu_register(&nd_pmu->pmu, nd_pmu->pmu.name, -1);
 	if (rc) {
-		kfree(nd_pmu->pmu.attr_groups);
 		nvdimm_pmu_free_hotplug_memory(nd_pmu);
+		kfree(nd_pmu->pmu.attr_groups);
 		return rc;
 	}
 
@@ -324,6 +324,7 @@ void unregister_nvdimm_pmu(struct nvdimm_pmu *nd_pmu)
 {
 	perf_pmu_unregister(&nd_pmu->pmu);
 	nvdimm_pmu_free_hotplug_memory(nd_pmu);
+	kfree(nd_pmu->pmu.attr_groups);
 	kfree(nd_pmu);
 }
 EXPORT_SYMBOL_GPL(unregister_nvdimm_pmu);

drivers/nvdimm/nd_virtio.c

@@ -105,7 +105,8 @@ int async_pmem_flush(struct nd_region *nd_region, struct bio *bio)
 	 * parent bio. Otherwise directly call nd_region flush.
 	 */
 	if (bio && bio->bi_iter.bi_sector != -1) {
-		struct bio *child = bio_alloc(bio->bi_bdev, 0, REQ_PREFLUSH,
+		struct bio *child = bio_alloc(bio->bi_bdev, 0,
+					      REQ_OP_WRITE | REQ_PREFLUSH,
 					      GFP_ATOMIC);
 
 		if (!child)

drivers/nvdimm/of_pmem.c

@@ -2,11 +2,11 @@
 
 #define pr_fmt(fmt) "of_pmem: " fmt
 
-#include <linux/of_platform.h>
-#include <linux/of_address.h>
+#include <linux/of.h>
 #include <linux/libnvdimm.h>
 #include <linux/module.h>
 #include <linux/ioport.h>
+#include <linux/platform_device.h>
 #include <linux/slab.h>
 
 struct of_pmem_private {

drivers/nvdimm/pfn_devs.c

@@ -452,8 +452,9 @@ int nd_pfn_validate(struct nd_pfn *nd_pfn, const char *sig)
 	u64 checksum, offset;
 	struct resource *res;
 	enum nd_pfn_mode mode;
+	resource_size_t res_size;
 	struct nd_namespace_io *nsio;
-	unsigned long align, start_pad;
+	unsigned long align, start_pad, end_trunc;
 	struct nd_pfn_sb *pfn_sb = nd_pfn->pfn_sb;
 	struct nd_namespace_common *ndns = nd_pfn->ndns;
 	const uuid_t *parent_uuid = nd_dev_to_uuid(&ndns->dev);
@@ -503,6 +504,7 @@ int nd_pfn_validate(struct nd_pfn *nd_pfn, const char *sig)
 	align = le32_to_cpu(pfn_sb->align);
 	offset = le64_to_cpu(pfn_sb->dataoff);
 	start_pad = le32_to_cpu(pfn_sb->start_pad);
+	end_trunc = le32_to_cpu(pfn_sb->end_trunc);
 	if (align == 0)
 		align = 1UL << ilog2(offset);
 	mode = le32_to_cpu(pfn_sb->mode);
@@ -584,7 +586,8 @@ int nd_pfn_validate(struct nd_pfn *nd_pfn, const char *sig)
 	 */
 	nsio = to_nd_namespace_io(&ndns->dev);
 	res = &nsio->res;
-	if (offset >= resource_size(res)) {
+	res_size = resource_size(res);
+	if (offset >= res_size) {
 		dev_err(&nd_pfn->dev, "pfn array size exceeds capacity of %s\n",
 				dev_name(&ndns->dev));
 		return -EOPNOTSUPP;
@@ -598,18 +601,20 @@ int nd_pfn_validate(struct nd_pfn *nd_pfn, const char *sig)
 		return -EOPNOTSUPP;
 	}
 
-	if (!IS_ALIGNED(res->start + le32_to_cpu(pfn_sb->start_pad),
-				memremap_compat_align())) {
+	if (!IS_ALIGNED(res->start + start_pad, memremap_compat_align())) {
 		dev_err(&nd_pfn->dev, "resource start misaligned\n");
 		return -EOPNOTSUPP;
 	}
 
-	if (!IS_ALIGNED(res->end + 1 - le32_to_cpu(pfn_sb->end_trunc),
-				memremap_compat_align())) {
+	if (!IS_ALIGNED(res->end + 1 - end_trunc, memremap_compat_align())) {
 		dev_err(&nd_pfn->dev, "resource end misaligned\n");
 		return -EOPNOTSUPP;
 	}
 
+	if (offset >= (res_size - start_pad - end_trunc)) {
+		dev_err(&nd_pfn->dev, "bad offset with small namespace\n");
+		return -EOPNOTSUPP;
+	}
 	return 0;
 }
 EXPORT_SYMBOL(nd_pfn_validate);
@@ -810,7 +815,8 @@ static int nd_pfn_init(struct nd_pfn *nd_pfn)
 	else
 		return -ENXIO;
 
-	if (offset >= size) {
+	if (offset >= (size - end_trunc)) {
+		/* This results in zero size devices */
 		dev_err(&nd_pfn->dev, "%s unable to satisfy requested alignment\n",
 				dev_name(&ndns->dev));
 		return -ENXIO;

drivers/nvdimm/pmem.c

@@ -17,6 +17,7 @@
 #include <linux/moduleparam.h>
 #include <linux/badblocks.h>
 #include <linux/memremap.h>
+#include <linux/kstrtox.h>
 #include <linux/vmalloc.h>
 #include <linux/blk-mq.h>
 #include <linux/pfn_t.h>
@@ -385,7 +386,7 @@ static ssize_t write_cache_store(struct device *dev,
 	bool write_cache;
 	int rc;
 
-	rc = strtobool(buf, &write_cache);
+	rc = kstrtobool(buf, &write_cache);
 	if (rc)
 		return rc;
 	dax_write_cache(pmem->dax_dev, write_cache);

drivers/nvdimm/region_devs.c

@@ -5,6 +5,7 @@
 #include <linux/scatterlist.h>
 #include <linux/memregion.h>
 #include <linux/highmem.h>
+#include <linux/kstrtox.h>
 #include <linux/sched.h>
 #include <linux/slab.h>
 #include <linux/hash.h>
@@ -275,7 +276,7 @@ static ssize_t deep_flush_store(struct device *dev, struct device_attribute *att
 		const char *buf, size_t len)
 {
 	bool flush;
-	int rc = strtobool(buf, &flush);
+	int rc = kstrtobool(buf, &flush);
 	struct nd_region *nd_region = to_nd_region(dev);
 
 	if (rc)
@@ -530,7 +531,7 @@ static ssize_t read_only_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t len)
 {
 	bool ro;
-	int rc = strtobool(buf, &ro);
+	int rc = kstrtobool(buf, &ro);
 	struct nd_region *nd_region = to_nd_region(dev);
 
 	if (rc)