Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security

Pull security subsystem fixes from James Morris:
 "This includes several fixes for TPM, as well as a fix for the x.509
  certificate parser to address CVE-2015-5327"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
  X.509: Fix the time validation [ver #2]
  tpm: fix compat 'ppi' link handling in tpm_chip_register()
  tpm: fix missing migratable flag in sealing functionality for TPM2
  TPM: revert the list handling logic fixed in 398a1e7
  TPM: Avoid reference to potentially freed memory
  tpm_tis: restore IRQ vector in IO memory after failed probing
  tpm_tis: free irq after probing

Author: torvalds

crypto/asymmetric_keys/x509_cert_parser.c

@@ -531,7 +531,11 @@ int x509_decode_time(time64_t *_t,  size_t hdrlen,
 	if (*p != 'Z')
 		goto unsupported_time;
 
-	mon_len = month_lengths[mon];
+	if (year < 1970 ||
+	    mon < 1 || mon > 12)
+		goto invalid_time;
+
+	mon_len = month_lengths[mon - 1];
 	if (mon == 2) {
 		if (year % 4 == 0) {
 			mon_len = 29;
@@ -543,14 +547,12 @@ int x509_decode_time(time64_t *_t,  size_t hdrlen,
 		}
 	}
 
-	if (year < 1970 ||
-	    mon < 1 || mon > 12 ||
-	    day < 1 || day > mon_len ||
+	if (day < 1 || day > mon_len ||
 	    hour > 23 ||
 	    min > 59 ||
 	    sec > 59)
 		goto invalid_time;
-	
+
 	*_t = mktime64(year, mon, day, hour, min, sec);
 	return 0;
 

drivers/char/tpm/tpm-chip.c

@@ -226,21 +226,23 @@ int tpm_chip_register(struct tpm_chip *chip)
 	if (rc)
 		goto out_err;
 
-	if (!(chip->flags & TPM_CHIP_FLAG_TPM2)) {
-		rc = __compat_only_sysfs_link_entry_to_kobj(&chip->pdev->kobj,
-							    &chip->dev.kobj,
-							    "ppi");
-		if (rc)
-			goto out_err;
-	}
-
 	/* Make the chip available. */
 	spin_lock(&driver_lock);
-	list_add_rcu(&chip->list, &tpm_chip_list);
+	list_add_tail_rcu(&chip->list, &tpm_chip_list);
 	spin_unlock(&driver_lock);
 
 	chip->flags |= TPM_CHIP_FLAG_REGISTERED;
 
+	if (!(chip->flags & TPM_CHIP_FLAG_TPM2)) {
+		rc = __compat_only_sysfs_link_entry_to_kobj(&chip->pdev->kobj,
+							    &chip->dev.kobj,
+							    "ppi");
+		if (rc && rc != -ENOENT) {
+			tpm_chip_unregister(chip);
+			return rc;
+		}
+	}
+
 	return 0;
 out_err:
 	tpm1_chip_unregister(chip);

drivers/char/tpm/tpm2-cmd.c

@@ -443,12 +443,13 @@ int tpm2_seal_trusted(struct tpm_chip *chip,
 			     TPM_DIGEST_SIZE);
 
 	/* sensitive */
-	tpm_buf_append_u16(&buf, 4 + TPM_DIGEST_SIZE + payload->key_len);
+	tpm_buf_append_u16(&buf, 4 + TPM_DIGEST_SIZE + payload->key_len + 1);
 
 	tpm_buf_append_u16(&buf, TPM_DIGEST_SIZE);
 	tpm_buf_append(&buf, options->blobauth, TPM_DIGEST_SIZE);
-	tpm_buf_append_u16(&buf, payload->key_len);
+	tpm_buf_append_u16(&buf, payload->key_len + 1);
 	tpm_buf_append(&buf, payload->key, payload->key_len);
+	tpm_buf_append_u8(&buf, payload->migratable);
 
 	/* public */
 	tpm_buf_append_u16(&buf, 14);
@@ -573,6 +574,8 @@ static int tpm2_unseal(struct tpm_chip *chip,
 		       u32 blob_handle)
 {
 	struct tpm_buf buf;
+	u16 data_len;
+	u8 *data;
 	int rc;
 
 	rc = tpm_buf_init(&buf, TPM2_ST_SESSIONS, TPM2_CC_UNSEAL);
@@ -591,11 +594,13 @@ static int tpm2_unseal(struct tpm_chip *chip,
 		rc = -EPERM;
 
 	if (!rc) {
-		payload->key_len = be16_to_cpup(
+		data_len = be16_to_cpup(
 			(__be16 *) &buf.data[TPM_HEADER_SIZE + 4]);
+		data = &buf.data[TPM_HEADER_SIZE + 6];
 
-		memcpy(payload->key, &buf.data[TPM_HEADER_SIZE + 6],
-		       payload->key_len);
+		memcpy(payload->key, data, data_len - 1);
+		payload->key_len = data_len - 1;
+		payload->migratable = data[data_len - 1];
 	}
 
 	tpm_buf_destroy(&buf);

drivers/char/tpm/tpm_of.c

@@ -53,17 +53,18 @@ int read_log(struct tpm_bios_log *log)
 		goto cleanup_eio;
 	}
 
-	of_node_put(np);
 	log->bios_event_log = kmalloc(*sizep, GFP_KERNEL);
 	if (!log->bios_event_log) {
 		pr_err("%s: ERROR - Not enough memory for BIOS measurements\n",
 		       __func__);
+		of_node_put(np);
 		return -ENOMEM;
 	}
 
 	log->bios_event_log_end = log->bios_event_log + *sizep;
 
 	memcpy(log->bios_event_log, __va(*basep), *sizep);
+	of_node_put(np);
 
 	return 0;
 

drivers/char/tpm/tpm_tis.c

@@ -645,6 +645,7 @@ static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info,
 {
 	u32 vendor, intfcaps, intmask;
 	int rc, i, irq_s, irq_e, probe;
+	int irq_r = -1;
 	struct tpm_chip *chip;
 	struct priv_data *priv;
 
@@ -751,6 +752,7 @@ static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info,
 		irq_s =
 		    ioread8(chip->vendor.iobase +
 			    TPM_INT_VECTOR(chip->vendor.locality));
+		irq_r = irq_s;
 		if (irq_s) {
 			irq_e = irq_s;
 		} else {
@@ -805,6 +807,8 @@ static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info,
 			iowrite32(intmask,
 				  chip->vendor.iobase +
 				  TPM_INT_ENABLE(chip->vendor.locality));
+
+			devm_free_irq(dev, i, chip);
 		}
 	}
 	if (chip->vendor.irq) {
@@ -831,7 +835,9 @@ static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info,
 				  chip->vendor.iobase +
 				  TPM_INT_ENABLE(chip->vendor.locality));
 		}
-	}
+	} else if (irq_r != -1)
+		iowrite8(irq_r, chip->vendor.iobase +
+			 TPM_INT_VECTOR(chip->vendor.locality));
 
 	if (chip->flags & TPM_CHIP_FLAG_TPM2) {
 		chip->vendor.timeout_a = msecs_to_jiffies(TPM2_TIMEOUT_A);