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libnvdimm fixes v5.1-rc6 

- Compatibility fix for nvdimm-security implementations with a default
   zero-key.
 
 - Miscellaneous small fixes for out-of-bound accesses, cleanup after
   initialization failures, and missing debug messages.
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Merge tag 'libnvdimm-fixes-5.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm

Pull libnvdimm fixes from Dan Williams:
 "I debated holding this back for the v5.2 merge window due to the size
  of the "zero-key" changes, but affected users would benefit from
  having the fixes sooner. It did not make sense to change the zero-key
  semantic in isolation for the "secure-erase" command, but instead
  include it for all security commands.

  The short background on the need for these changes is that some NVDIMM
  platforms enable security with a default zero-key rather than let the
  OS specify the initial key. This makes the security enabling that
  landed in v5.0 unusable for some users.

  Summary:

   - Compatibility fix for nvdimm-security implementations with a
     default zero-key.

   - Miscellaneous small fixes for out-of-bound accesses, cleanup after
     initialization failures, and missing debug messages"

* tag 'libnvdimm-fixes-5.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  tools/testing/nvdimm: Retain security state after overwrite
  libnvdimm/pmem: fix a possible OOB access when read and write pmem
  libnvdimm/security, acpi/nfit: unify zero-key for all security commands
  libnvdimm/security: provide fix for secure-erase to use zero-key
  libnvdimm/btt: Fix a kmemdup failure check
  libnvdimm/namespace: Fix a potential NULL pointer dereference
  acpi/nfit: Always dump _DSM output payload
This commit is contained in:
Linus Torvalds 2019-04-15 16:48:51 -07:00
parent 5512320c9f 2170a0d53b
commit 618d919cae
7 changed files with 117 additions and 71 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/acpi/nfit/core.c
View File

@ -567,6 +567,12 @@ int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm,
goto out;
}
dev_dbg(dev, "%s cmd: %s output length: %d\n", dimm_name,
cmd_name, out_obj->buffer.length);
print_hex_dump_debug(cmd_name, DUMP_PREFIX_OFFSET, 4, 4,
out_obj->buffer.pointer,
min_t(u32, 128, out_obj->buffer.length), true);
if (call_pkg) {
call_pkg->nd_fw_size = out_obj->buffer.length;
memcpy(call_pkg->nd_payload + call_pkg->nd_size_in,
@ -585,12 +591,6 @@ int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm,
return 0;
}
dev_dbg(dev, "%s cmd: %s output length: %d\n", dimm_name,
cmd_name, out_obj->buffer.length);
print_hex_dump_debug(cmd_name, DUMP_PREFIX_OFFSET, 4, 4,
out_obj->buffer.pointer,
min_t(u32, 128, out_obj->buffer.length), true);
for (i = 0, offset = 0; i < desc->out_num; i++) {
u32 out_size = nd_cmd_out_size(nvdimm, cmd, desc, i, buf,
(u32 *) out_obj->buffer.pointer,

10
drivers/acpi/nfit/intel.c
View File

@ -122,9 +122,8 @@ static int intel_security_change_key(struct nvdimm *nvdimm,
if (!test_bit(cmd, &nfit_mem->dsm_mask))
return -ENOTTY;
if (old_data)
memcpy(nd_cmd.cmd.old_pass, old_data->data,
sizeof(nd_cmd.cmd.old_pass));
memcpy(nd_cmd.cmd.old_pass, old_data->data,
sizeof(nd_cmd.cmd.old_pass));
memcpy(nd_cmd.cmd.new_pass, new_data->data,
sizeof(nd_cmd.cmd.new_pass));
rc = nvdimm_ctl(nvdimm, ND_CMD_CALL, &nd_cmd, sizeof(nd_cmd), NULL);
@ -336,9 +335,8 @@ static int __maybe_unused intel_security_overwrite(struct nvdimm *nvdimm,
/* flush all cache before we erase DIMM */
nvdimm_invalidate_cache();
if (nkey)
memcpy(nd_cmd.cmd.passphrase, nkey->data,
sizeof(nd_cmd.cmd.passphrase));
memcpy(nd_cmd.cmd.passphrase, nkey->data,
sizeof(nd_cmd.cmd.passphrase));
rc = nvdimm_ctl(nvdimm, ND_CMD_CALL, &nd_cmd, sizeof(nd_cmd), NULL);
if (rc < 0)
return rc;

18
drivers/nvdimm/btt_devs.c
View File

@ -198,14 +198,15 @@ static struct device *__nd_btt_create(struct nd_region *nd_region,
return NULL;
nd_btt->id = ida_simple_get(&nd_region->btt_ida, 0, 0, GFP_KERNEL);
if (nd_btt->id < 0) {
kfree(nd_btt);
return NULL;
}
if (nd_btt->id < 0)
goto out_nd_btt;
nd_btt->lbasize = lbasize;
if (uuid)
if (uuid) {
uuid = kmemdup(uuid, 16, GFP_KERNEL);
if (!uuid)
goto out_put_id;
}
nd_btt->uuid = uuid;
dev = &nd_btt->dev;
dev_set_name(dev, "btt%d.%d", nd_region->id, nd_btt->id);
@ -220,6 +221,13 @@ static struct device *__nd_btt_create(struct nd_region *nd_region,
return NULL;
}
return dev;
out_put_id:
ida_simple_remove(&nd_region->btt_ida, nd_btt->id);
out_nd_btt:
kfree(nd_btt);
return NULL;
}
struct device *nd_btt_create(struct nd_region *nd_region)

5
drivers/nvdimm/namespace_devs.c
View File

@ -2249,9 +2249,12 @@ static struct device *create_namespace_blk(struct nd_region *nd_region,
if (!nsblk->uuid)
goto blk_err;
memcpy(name, nd_label->name, NSLABEL_NAME_LEN);
if (name[0])
if (name[0]) {
nsblk->alt_name = kmemdup(name, NSLABEL_NAME_LEN,
GFP_KERNEL);
if (!nsblk->alt_name)
goto blk_err;
}
res = nsblk_add_resource(nd_region, ndd, nsblk,
__le64_to_cpu(nd_label->dpa));
if (!res)

8
drivers/nvdimm/pmem.c
View File

@ -113,13 +113,13 @@ static void write_pmem(void *pmem_addr, struct page *page,
while (len) {
mem = kmap_atomic(page);
chunk = min_t(unsigned int, len, PAGE_SIZE);
chunk = min_t(unsigned int, len, PAGE_SIZE - off);
memcpy_flushcache(pmem_addr, mem + off, chunk);
kunmap_atomic(mem);
len -= chunk;
off = 0;
page++;
pmem_addr += PAGE_SIZE;
pmem_addr += chunk;
}
}
@ -132,7 +132,7 @@ static blk_status_t read_pmem(struct page *page, unsigned int off,
while (len) {
mem = kmap_atomic(page);
chunk = min_t(unsigned int, len, PAGE_SIZE);
chunk = min_t(unsigned int, len, PAGE_SIZE - off);
rem = memcpy_mcsafe(mem + off, pmem_addr, chunk);
kunmap_atomic(mem);
if (rem)
@ -140,7 +140,7 @@ static blk_status_t read_pmem(struct page *page, unsigned int off,
len -= chunk;
off = 0;
page++;
pmem_addr += PAGE_SIZE;
pmem_addr += chunk;
}
return BLK_STS_OK;
}

118
drivers/nvdimm/security.c
View File

@ -22,6 +22,8 @@ static bool key_revalidate = true;
module_param(key_revalidate, bool, 0444);
MODULE_PARM_DESC(key_revalidate, "Require key validation at init.");
static const char zero_key[NVDIMM_PASSPHRASE_LEN];
static void *key_data(struct key *key)
{
struct encrypted_key_payload *epayload = dereference_key_locked(key);
@ -75,6 +77,16 @@ static struct key *nvdimm_request_key(struct nvdimm *nvdimm)
return key;
}
static const void *nvdimm_get_key_payload(struct nvdimm *nvdimm,
struct key **key)
{
*key = nvdimm_request_key(nvdimm);
if (!*key)
return zero_key;
return key_data(*key);
}
static struct key *nvdimm_lookup_user_key(struct nvdimm *nvdimm,
key_serial_t id, int subclass)
{
@ -105,36 +117,57 @@ static struct key *nvdimm_lookup_user_key(struct nvdimm *nvdimm,
return key;
}
static struct key *nvdimm_key_revalidate(struct nvdimm *nvdimm)
static const void *nvdimm_get_user_key_payload(struct nvdimm *nvdimm,
key_serial_t id, int subclass, struct key **key)
{
*key = NULL;
if (id == 0) {
if (subclass == NVDIMM_BASE_KEY)
return zero_key;
else
return NULL;
}
*key = nvdimm_lookup_user_key(nvdimm, id, subclass);
if (!*key)
return NULL;
return key_data(*key);
}
static int nvdimm_key_revalidate(struct nvdimm *nvdimm)
{
struct key *key;
int rc;
const void *data;
if (!nvdimm->sec.ops->change_key)
return NULL;
return -EOPNOTSUPP;
key = nvdimm_request_key(nvdimm);
if (!key)
return NULL;
data = nvdimm_get_key_payload(nvdimm, &key);
/*
* Send the same key to the hardware as new and old key to
* verify that the key is good.
*/
rc = nvdimm->sec.ops->change_key(nvdimm, key_data(key),
key_data(key), NVDIMM_USER);
rc = nvdimm->sec.ops->change_key(nvdimm, data, data, NVDIMM_USER);
if (rc < 0) {
nvdimm_put_key(key);
key = NULL;
return rc;
}
return key;
nvdimm_put_key(key);
nvdimm->sec.state = nvdimm_security_state(nvdimm, NVDIMM_USER);
return 0;
}
static int __nvdimm_security_unlock(struct nvdimm *nvdimm)
{
struct device *dev = &nvdimm->dev;
struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
struct key *key = NULL;
struct key *key;
const void *data;
int rc;
/* The bus lock should be held at the top level of the call stack */
@ -160,16 +193,11 @@ static int __nvdimm_security_unlock(struct nvdimm *nvdimm)
if (!key_revalidate)
return 0;
key = nvdimm_key_revalidate(nvdimm);
if (!key)
return nvdimm_security_freeze(nvdimm);
return nvdimm_key_revalidate(nvdimm);
} else
key = nvdimm_request_key(nvdimm);
data = nvdimm_get_key_payload(nvdimm, &key);
if (!key)
return -ENOKEY;
rc = nvdimm->sec.ops->unlock(nvdimm, key_data(key));
rc = nvdimm->sec.ops->unlock(nvdimm, data);
dev_dbg(dev, "key: %d unlock: %s\n", key_serial(key),
rc == 0 ? "success" : "fail");
@ -195,6 +223,7 @@ int nvdimm_security_disable(struct nvdimm *nvdimm, unsigned int keyid)
struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
struct key *key;
int rc;
const void *data;
/* The bus lock should be held at the top level of the call stack */
lockdep_assert_held(&nvdimm_bus->reconfig_mutex);
@ -214,11 +243,12 @@ int nvdimm_security_disable(struct nvdimm *nvdimm, unsigned int keyid)
return -EBUSY;
}
key = nvdimm_lookup_user_key(nvdimm, keyid, NVDIMM_BASE_KEY);
if (!key)
data = nvdimm_get_user_key_payload(nvdimm, keyid,
NVDIMM_BASE_KEY, &key);
if (!data)
return -ENOKEY;
rc = nvdimm->sec.ops->disable(nvdimm, key_data(key));
rc = nvdimm->sec.ops->disable(nvdimm, data);
dev_dbg(dev, "key: %d disable: %s\n", key_serial(key),
rc == 0 ? "success" : "fail");
@ -235,6 +265,7 @@ int nvdimm_security_update(struct nvdimm *nvdimm, unsigned int keyid,
struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
struct key *key, *newkey;
int rc;
const void *data, *newdata;
/* The bus lock should be held at the top level of the call stack */
lockdep_assert_held(&nvdimm_bus->reconfig_mutex);
@ -249,22 +280,19 @@ int nvdimm_security_update(struct nvdimm *nvdimm, unsigned int keyid,
return -EIO;
}
if (keyid == 0)
key = NULL;
else {
key = nvdimm_lookup_user_key(nvdimm, keyid, NVDIMM_BASE_KEY);
if (!key)
return -ENOKEY;
}
data = nvdimm_get_user_key_payload(nvdimm, keyid,
NVDIMM_BASE_KEY, &key);
if (!data)
return -ENOKEY;
newkey = nvdimm_lookup_user_key(nvdimm, new_keyid, NVDIMM_NEW_KEY);
if (!newkey) {
newdata = nvdimm_get_user_key_payload(nvdimm, new_keyid,
NVDIMM_NEW_KEY, &newkey);
if (!newdata) {
nvdimm_put_key(key);
return -ENOKEY;
}
rc = nvdimm->sec.ops->change_key(nvdimm, key ? key_data(key) : NULL,
key_data(newkey), pass_type);
rc = nvdimm->sec.ops->change_key(nvdimm, data, newdata, pass_type);
dev_dbg(dev, "key: %d %d update%s: %s\n",
key_serial(key), key_serial(newkey),
pass_type == NVDIMM_MASTER ? "(master)" : "(user)",
@ -286,8 +314,9 @@ int nvdimm_security_erase(struct nvdimm *nvdimm, unsigned int keyid,
{
struct device *dev = &nvdimm->dev;
struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
struct key *key;
struct key *key = NULL;
int rc;
const void *data;
/* The bus lock should be held at the top level of the call stack */
lockdep_assert_held(&nvdimm_bus->reconfig_mutex);
@ -319,11 +348,12 @@ int nvdimm_security_erase(struct nvdimm *nvdimm, unsigned int keyid,
return -EOPNOTSUPP;
}
key = nvdimm_lookup_user_key(nvdimm, keyid, NVDIMM_BASE_KEY);
if (!key)
data = nvdimm_get_user_key_payload(nvdimm, keyid,
NVDIMM_BASE_KEY, &key);
if (!data)
return -ENOKEY;
rc = nvdimm->sec.ops->erase(nvdimm, key_data(key), pass_type);
rc = nvdimm->sec.ops->erase(nvdimm, data, pass_type);
dev_dbg(dev, "key: %d erase%s: %s\n", key_serial(key),
pass_type == NVDIMM_MASTER ? "(master)" : "(user)",
rc == 0 ? "success" : "fail");
@ -337,8 +367,9 @@ int nvdimm_security_overwrite(struct nvdimm *nvdimm, unsigned int keyid)
{
struct device *dev = &nvdimm->dev;
struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
struct key *key;
struct key *key = NULL;
int rc;
const void *data;
/* The bus lock should be held at the top level of the call stack */
lockdep_assert_held(&nvdimm_bus->reconfig_mutex);
@ -368,15 +399,12 @@ int nvdimm_security_overwrite(struct nvdimm *nvdimm, unsigned int keyid)
return -EBUSY;
}
if (keyid == 0)
key = NULL;
else {
key = nvdimm_lookup_user_key(nvdimm, keyid, NVDIMM_BASE_KEY);
if (!key)
return -ENOKEY;
}
data = nvdimm_get_user_key_payload(nvdimm, keyid,
NVDIMM_BASE_KEY, &key);
if (!data)
return -ENOKEY;
rc = nvdimm->sec.ops->overwrite(nvdimm, key ? key_data(key) : NULL);
rc = nvdimm->sec.ops->overwrite(nvdimm, data);
dev_dbg(dev, "key: %d overwrite submission: %s\n", key_serial(key),
rc == 0 ? "success" : "fail");

17
tools/testing/nvdimm/test/nfit.c
View File

@ -146,6 +146,7 @@ static int dimm_fail_cmd_code[ARRAY_SIZE(handle)];
struct nfit_test_sec {
u8 state;
u8 ext_state;
u8 old_state;
u8 passphrase[32];
u8 master_passphrase[32];
u64 overwrite_end_time;
@ -225,6 +226,8 @@ static struct workqueue_struct *nfit_wq;
static struct gen_pool *nfit_pool;
static const char zero_key[NVDIMM_PASSPHRASE_LEN];
static struct nfit_test *to_nfit_test(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
@ -1059,8 +1062,7 @@ static int nd_intel_test_cmd_secure_erase(struct nfit_test *t,
struct device *dev = &t->pdev.dev;
struct nfit_test_sec *sec = &dimm_sec_info[dimm];
if (!(sec->state & ND_INTEL_SEC_STATE_ENABLED) ||
(sec->state & ND_INTEL_SEC_STATE_FROZEN)) {
if (sec->state & ND_INTEL_SEC_STATE_FROZEN) {
nd_cmd->status = ND_INTEL_STATUS_INVALID_STATE;
dev_dbg(dev, "secure erase: wrong security state\n");
} else if (memcmp(nd_cmd->passphrase, sec->passphrase,
@ -1068,6 +1070,12 @@ static int nd_intel_test_cmd_secure_erase(struct nfit_test *t,
nd_cmd->status = ND_INTEL_STATUS_INVALID_PASS;
dev_dbg(dev, "secure erase: wrong passphrase\n");
} else {
if (!(sec->state & ND_INTEL_SEC_STATE_ENABLED)
&& (memcmp(nd_cmd->passphrase, zero_key,
ND_INTEL_PASSPHRASE_SIZE) != 0)) {
dev_dbg(dev, "invalid zero key\n");
return 0;
}
memset(sec->passphrase, 0, ND_INTEL_PASSPHRASE_SIZE);
memset(sec->master_passphrase, 0, ND_INTEL_PASSPHRASE_SIZE);
sec->state = 0;
@ -1093,7 +1101,7 @@ static int nd_intel_test_cmd_overwrite(struct nfit_test *t,
return 0;
}
memset(sec->passphrase, 0, ND_INTEL_PASSPHRASE_SIZE);
sec->old_state = sec->state;
sec->state = ND_INTEL_SEC_STATE_OVERWRITE;
dev_dbg(dev, "overwrite progressing.\n");
sec->overwrite_end_time = get_jiffies_64() + 5 * HZ;
@ -1115,7 +1123,8 @@ static int nd_intel_test_cmd_query_overwrite(struct nfit_test *t,
if (time_is_before_jiffies64(sec->overwrite_end_time)) {
sec->overwrite_end_time = 0;
sec->state = 0;
sec->state = sec->old_state;
sec->old_state = 0;
sec->ext_state = ND_INTEL_SEC_ESTATE_ENABLED;
dev_dbg(dev, "overwrite is complete\n");
} else