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authorLinus Torvalds <torvalds@linux-foundation.org>2013-04-30 16:27:51 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-04-30 16:27:51 -0700
commit2e1deaad1e48453cea782854ab87df3f78c121c2 (patch)
treeda0fe592dcc9ef6b0c4cd104a67af3c1d9e4c5d5
parent50528fabeb25f9883e2845f5147f5e00a1c57cf7 (diff)
parentb7ae9f064bec903bd4a9f257a35da4d1e9bbcc99 (diff)
downloadlinux-linaro-stable-2e1deaad1e48453cea782854ab87df3f78c121c2.tar.gz
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
Pull security subsystem update from James Morris: "Just some minor updates across the subsystem" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: ima: eliminate passing d_name.name to process_measurement() TPM: Retry SaveState command in suspend path tpm/tpm_i2c_infineon: Add small comment about return value of __i2c_transfer tpm/tpm_i2c_infineon.c: Add OF attributes type and name to the of_device_id table entries tpm_i2c_stm_st33: Remove duplicate inclusion of header files tpm: Add support for new Infineon I2C TPM (SLB 9645 TT 1.2 I2C) char/tpm: Convert struct i2c_msg initialization to C99 format drivers/char/tpm/tpm_ppi: use strlcpy instead of strncpy tpm/tpm_i2c_stm_st33: formatting and white space changes Smack: include magic.h in smackfs.c selinux: make security_sb_clone_mnt_opts return an error on context mismatch seccomp: allow BPF_XOR based ALU instructions. Fix NULL pointer dereference in smack_inode_unlink() and smack_inode_rmdir() Smack: add support for modification of existing rules smack: SMACK_MAGIC to include/uapi/linux/magic.h Smack: add missing support for transmute bit in smack_str_from_perm() Smack: prevent revoke-subject from failing when unseen label is written to it tomoyo: use DEFINE_SRCU() to define tomoyo_ss tomoyo: use DEFINE_SRCU() to define tomoyo_ss
-rw-r--r--Documentation/devicetree/bindings/i2c/trivial-devices.txt2
-rw-r--r--Documentation/security/Smack.txt11
-rw-r--r--drivers/char/tpm/tpm.c31
-rw-r--r--drivers/char/tpm/tpm.h3
-rw-r--r--drivers/char/tpm/tpm_i2c_infineon.c180
-rw-r--r--drivers/char/tpm/tpm_i2c_stm_st33.c64
-rw-r--r--drivers/char/tpm/tpm_ppi.c14
-rw-r--r--fs/nfs/super.c3
-rw-r--r--include/linux/security.h10
-rw-r--r--include/uapi/linux/magic.h1
-rw-r--r--kernel/seccomp.c2
-rw-r--r--security/capability.c3
-rw-r--r--security/integrity/ima/ima_main.c14
-rw-r--r--security/security.c4
-rw-r--r--security/selinux/hooks.c39
-rw-r--r--security/smack/smack.h5
-rw-r--r--security/smack/smack_access.c2
-rw-r--r--security/smack/smack_lsm.c4
-rw-r--r--security/smack/smackfs.c254
-rw-r--r--security/tomoyo/tomoyo.c5
20 files changed, 450 insertions, 201 deletions
diff --git a/Documentation/devicetree/bindings/i2c/trivial-devices.txt b/Documentation/devicetree/bindings/i2c/trivial-devices.txt
index 446859fcdca4..ad6a73852f08 100644
--- a/Documentation/devicetree/bindings/i2c/trivial-devices.txt
+++ b/Documentation/devicetree/bindings/i2c/trivial-devices.txt
@@ -35,6 +35,8 @@ fsl,mc13892 MC13892: Power Management Integrated Circuit (PMIC) for i.MX35/51
fsl,mma8450 MMA8450Q: Xtrinsic Low-power, 3-axis Xtrinsic Accelerometer
fsl,mpr121 MPR121: Proximity Capacitive Touch Sensor Controller
fsl,sgtl5000 SGTL5000: Ultra Low-Power Audio Codec
+infineon,slb9635tt Infineon SLB9635 (Soft-) I2C TPM (old protocol, max 100khz)
+infineon,slb9645tt Infineon SLB9645 I2C TPM (new protocol, max 400khz)
maxim,ds1050 5 Bit Programmable, Pulse-Width Modulator
maxim,max1237 Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs
maxim,max6625 9-Bit/12-Bit Temperature Sensors with I²C-Compatible Serial Interface
diff --git a/Documentation/security/Smack.txt b/Documentation/security/Smack.txt
index 8a177e4b6e21..7a2d30c132e3 100644
--- a/Documentation/security/Smack.txt
+++ b/Documentation/security/Smack.txt
@@ -117,6 +117,17 @@ access2
ambient
This contains the Smack label applied to unlabeled network
packets.
+change-rule
+ This interface allows modification of existing access control rules.
+ The format accepted on write is:
+ "%s %s %s %s"
+ where the first string is the subject label, the second the
+ object label, the third the access to allow and the fourth the
+ access to deny. The access strings may contain only the characters
+ "rwxat-". If a rule for a given subject and object exists it will be
+ modified by enabling the permissions in the third string and disabling
+ those in the fourth string. If there is no such rule it will be
+ created using the access specified in the third and the fourth strings.
cipso
This interface allows a specific CIPSO header to be assigned
to a Smack label. The format accepted on write is:
diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c
index 0d2e82f95577..7c3b3dcbfbc8 100644
--- a/drivers/char/tpm/tpm.c
+++ b/drivers/char/tpm/tpm.c
@@ -1337,7 +1337,7 @@ int tpm_pm_suspend(struct device *dev)
{
struct tpm_chip *chip = dev_get_drvdata(dev);
struct tpm_cmd_t cmd;
- int rc;
+ int rc, try;
u8 dummy_hash[TPM_DIGEST_SIZE] = { 0 };
@@ -1355,9 +1355,32 @@ int tpm_pm_suspend(struct device *dev)
}
/* now do the actual savestate */
- cmd.header.in = savestate_header;
- rc = transmit_cmd(chip, &cmd, SAVESTATE_RESULT_SIZE,
- "sending savestate before suspend");
+ for (try = 0; try < TPM_RETRY; try++) {
+ cmd.header.in = savestate_header;
+ rc = transmit_cmd(chip, &cmd, SAVESTATE_RESULT_SIZE, NULL);
+
+ /*
+ * If the TPM indicates that it is too busy to respond to
+ * this command then retry before giving up. It can take
+ * several seconds for this TPM to be ready.
+ *
+ * This can happen if the TPM has already been sent the
+ * SaveState command before the driver has loaded. TCG 1.2
+ * specification states that any communication after SaveState
+ * may cause the TPM to invalidate previously saved state.
+ */
+ if (rc != TPM_WARN_RETRY)
+ break;
+ msleep(TPM_TIMEOUT_RETRY);
+ }
+
+ if (rc)
+ dev_err(chip->dev,
+ "Error (%d) sending savestate before suspend\n", rc);
+ else if (try > 0)
+ dev_warn(chip->dev, "TPM savestate took %dms\n",
+ try * TPM_TIMEOUT_RETRY);
+
return rc;
}
EXPORT_SYMBOL_GPL(tpm_pm_suspend);
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index 81b52015f669..0770d1d79366 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -32,10 +32,12 @@ enum tpm_const {
TPM_MINOR = 224, /* officially assigned */
TPM_BUFSIZE = 4096,
TPM_NUM_DEVICES = 256,
+ TPM_RETRY = 50, /* 5 seconds */
};
enum tpm_timeout {
TPM_TIMEOUT = 5, /* msecs */
+ TPM_TIMEOUT_RETRY = 100 /* msecs */
};
/* TPM addresses */
@@ -44,6 +46,7 @@ enum tpm_addr {
TPM_ADDR = 0x4E,
};
+#define TPM_WARN_RETRY 0x800
#define TPM_WARN_DOING_SELFTEST 0x802
#define TPM_ERR_DEACTIVATED 0x6
#define TPM_ERR_DISABLED 0x7
diff --git a/drivers/char/tpm/tpm_i2c_infineon.c b/drivers/char/tpm/tpm_i2c_infineon.c
index 8fe7ac3d095b..37d5dcc10ea7 100644
--- a/drivers/char/tpm/tpm_i2c_infineon.c
+++ b/drivers/char/tpm/tpm_i2c_infineon.c
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2012 Infineon Technologies
+ * Copyright (C) 2012,2013 Infineon Technologies
*
* Authors:
* Peter Huewe <peter.huewe@infineon.com>
@@ -56,13 +56,21 @@
#define TPM_TIMEOUT_US_HI (TPM_TIMEOUT_US_LOW + 2000)
/* expected value for DIDVID register */
-#define TPM_TIS_I2C_DID_VID 0x000b15d1L
+#define TPM_TIS_I2C_DID_VID_9635 0xd1150b00L
+#define TPM_TIS_I2C_DID_VID_9645 0x001a15d1L
+
+enum i2c_chip_type {
+ SLB9635,
+ SLB9645,
+ UNKNOWN,
+};
/* Structure to store I2C TPM specific stuff */
struct tpm_inf_dev {
struct i2c_client *client;
u8 buf[TPM_BUFSIZE + sizeof(u8)]; /* max. buffer size + addr */
struct tpm_chip *chip;
+ enum i2c_chip_type chip_type;
};
static struct tpm_inf_dev tpm_dev;
@@ -90,10 +98,20 @@ static struct i2c_driver tpm_tis_i2c_driver;
static int iic_tpm_read(u8 addr, u8 *buffer, size_t len)
{
- struct i2c_msg msg1 = { tpm_dev.client->addr, 0, 1, &addr };
- struct i2c_msg msg2 = { tpm_dev.client->addr, I2C_M_RD, len, buffer };
+ struct i2c_msg msg1 = {
+ .addr = tpm_dev.client->addr,
+ .len = 1,
+ .buf = &addr
+ };
+ struct i2c_msg msg2 = {
+ .addr = tpm_dev.client->addr,
+ .flags = I2C_M_RD,
+ .len = len,
+ .buf = buffer
+ };
+ struct i2c_msg msgs[] = {msg1, msg2};
- int rc;
+ int rc = 0;
int count;
/* Lock the adapter for the duration of the whole sequence. */
@@ -101,30 +119,53 @@ static int iic_tpm_read(u8 addr, u8 *buffer, size_t len)
return -EOPNOTSUPP;
i2c_lock_adapter(tpm_dev.client->adapter);
- for (count = 0; count < MAX_COUNT; count++) {
- rc = __i2c_transfer(tpm_dev.client->adapter, &msg1, 1);
- if (rc > 0)
- break; /* break here to skip sleep */
-
- usleep_range(SLEEP_DURATION_LOW, SLEEP_DURATION_HI);
- }
-
- if (rc <= 0)
- goto out;
-
- /* After the TPM has successfully received the register address it needs
- * some time, thus we're sleeping here again, before retrieving the data
- */
- for (count = 0; count < MAX_COUNT; count++) {
- usleep_range(SLEEP_DURATION_LOW, SLEEP_DURATION_HI);
- rc = __i2c_transfer(tpm_dev.client->adapter, &msg2, 1);
- if (rc > 0)
- break;
+ if (tpm_dev.chip_type == SLB9645) {
+ /* use a combined read for newer chips
+ * unfortunately the smbus functions are not suitable due to
+ * the 32 byte limit of the smbus.
+ * retries should usually not be needed, but are kept just to
+ * be on the safe side.
+ */
+ for (count = 0; count < MAX_COUNT; count++) {
+ rc = __i2c_transfer(tpm_dev.client->adapter, msgs, 2);
+ if (rc > 0)
+ break; /* break here to skip sleep */
+ usleep_range(SLEEP_DURATION_LOW, SLEEP_DURATION_HI);
+ }
+ } else {
+ /* slb9635 protocol should work in all cases */
+ for (count = 0; count < MAX_COUNT; count++) {
+ rc = __i2c_transfer(tpm_dev.client->adapter, &msg1, 1);
+ if (rc > 0)
+ break; /* break here to skip sleep */
+
+ usleep_range(SLEEP_DURATION_LOW, SLEEP_DURATION_HI);
+ }
+ if (rc <= 0)
+ goto out;
+
+ /* After the TPM has successfully received the register address
+ * it needs some time, thus we're sleeping here again, before
+ * retrieving the data
+ */
+ for (count = 0; count < MAX_COUNT; count++) {
+ usleep_range(SLEEP_DURATION_LOW, SLEEP_DURATION_HI);
+ rc = __i2c_transfer(tpm_dev.client->adapter, &msg2, 1);
+ if (rc > 0)
+ break;
+ }
}
out:
i2c_unlock_adapter(tpm_dev.client->adapter);
+ /* take care of 'guard time' */
+ usleep_range(SLEEP_DURATION_LOW, SLEEP_DURATION_HI);
+
+ /* __i2c_transfer returns the number of successfully transferred
+ * messages.
+ * So rc should be greater than 0 here otherwise we have an error.
+ */
if (rc <= 0)
return -EIO;
@@ -138,7 +179,11 @@ static int iic_tpm_write_generic(u8 addr, u8 *buffer, size_t len,
int rc = -EIO;
int count;
- struct i2c_msg msg1 = { tpm_dev.client->addr, 0, len + 1, tpm_dev.buf };
+ struct i2c_msg msg1 = {
+ .addr = tpm_dev.client->addr,
+ .len = len + 1,
+ .buf = tpm_dev.buf
+ };
if (len > TPM_BUFSIZE)
return -EINVAL;
@@ -154,16 +199,24 @@ static int iic_tpm_write_generic(u8 addr, u8 *buffer, size_t len,
/*
* NOTE: We have to use these special mechanisms here and unfortunately
* cannot rely on the standard behavior of i2c_transfer.
+ * Even for newer chips the smbus functions are not
+ * suitable due to the 32 byte limit of the smbus.
*/
for (count = 0; count < max_count; count++) {
rc = __i2c_transfer(tpm_dev.client->adapter, &msg1, 1);
if (rc > 0)
break;
-
usleep_range(sleep_low, sleep_hi);
}
i2c_unlock_adapter(tpm_dev.client->adapter);
+ /* take care of 'guard time' */
+ usleep_range(SLEEP_DURATION_LOW, SLEEP_DURATION_HI);
+
+ /* __i2c_transfer returns the number of successfully transferred
+ * messages.
+ * So rc should be greater than 0 here otherwise we have an error.
+ */
if (rc <= 0)
return -EIO;
@@ -283,11 +336,18 @@ static int request_locality(struct tpm_chip *chip, int loc)
static u8 tpm_tis_i2c_status(struct tpm_chip *chip)
{
/* NOTE: since I2C read may fail, return 0 in this case --> time-out */
- u8 buf;
- if (iic_tpm_read(TPM_STS(chip->vendor.locality), &buf, 1) < 0)
- return 0;
- else
- return buf;
+ u8 buf = 0xFF;
+ u8 i = 0;
+
+ do {
+ if (iic_tpm_read(TPM_STS(chip->vendor.locality), &buf, 1) < 0)
+ return 0;
+
+ i++;
+ /* if locallity is set STS should not be 0xFF */
+ } while ((buf == 0xFF) && i < 10);
+
+ return buf;
}
static void tpm_tis_i2c_ready(struct tpm_chip *chip)
@@ -328,7 +388,7 @@ static int wait_for_stat(struct tpm_chip *chip, u8 mask, unsigned long timeout,
/* check current status */
*status = tpm_tis_i2c_status(chip);
- if ((*status & mask) == mask)
+ if ((*status != 0xFF) && (*status & mask) == mask)
return 0;
stop = jiffies + timeout;
@@ -372,7 +432,6 @@ static int recv_data(struct tpm_chip *chip, u8 *buf, size_t count)
/* avoid endless loop in case of broken HW */
if (retries > MAX_COUNT_LONG)
return -EIO;
-
}
return size;
}
@@ -480,7 +539,6 @@ static int tpm_tis_i2c_send(struct tpm_chip *chip, u8 *buf, size_t len)
rc = -EIO;
goto out_err;
}
-
}
/* write last byte */
@@ -568,6 +626,7 @@ static int tpm_tis_i2c_init(struct device *dev)
chip = tpm_register_hardware(dev, &tpm_tis_i2c);
if (!chip) {
+ dev_err(dev, "could not register hardware\n");
rc = -ENODEV;
goto out_err;
}
@@ -582,20 +641,24 @@ static int tpm_tis_i2c_init(struct device *dev)
chip->vendor.timeout_d = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
if (request_locality(chip, 0) != 0) {
+ dev_err(dev, "could not request locality\n");
rc = -ENODEV;
goto out_vendor;
}
/* read four bytes from DID_VID register */
if (iic_tpm_read(TPM_DID_VID(0), (u8 *)&vendor, 4) < 0) {
+ dev_err(dev, "could not read vendor id\n");
rc = -EIO;
goto out_release;
}
- /* create DID_VID register value, after swapping to little-endian */
- vendor = be32_to_cpu((__be32) vendor);
-
- if (vendor != TPM_TIS_I2C_DID_VID) {
+ if (vendor == TPM_TIS_I2C_DID_VID_9645) {
+ tpm_dev.chip_type = SLB9645;
+ } else if (vendor == TPM_TIS_I2C_DID_VID_9635) {
+ tpm_dev.chip_type = SLB9635;
+ } else {
+ dev_err(dev, "vendor id did not match! ID was %08x\n", vendor);
rc = -ENODEV;
goto out_release;
}
@@ -631,22 +694,53 @@ out_err:
static const struct i2c_device_id tpm_tis_i2c_table[] = {
{"tpm_i2c_infineon", 0},
+ {"slb9635tt", 0},
+ {"slb9645tt", 1},
{},
};
MODULE_DEVICE_TABLE(i2c, tpm_tis_i2c_table);
+
+#ifdef CONFIG_OF
+static const struct of_device_id tpm_tis_i2c_of_match[] = {
+ {
+ .name = "tpm_i2c_infineon",
+ .type = "tpm",
+ .compatible = "infineon,tpm_i2c_infineon",
+ .data = (void *)0
+ },
+ {
+ .name = "slb9635tt",
+ .type = "tpm",
+ .compatible = "infineon,slb9635tt",
+ .data = (void *)0
+ },
+ {
+ .name = "slb9645tt",
+ .type = "tpm",
+ .compatible = "infineon,slb9645tt",
+ .data = (void *)1
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, tpm_tis_i2c_of_match);
+#endif
+
static SIMPLE_DEV_PM_OPS(tpm_tis_i2c_ops, tpm_pm_suspend, tpm_pm_resume);
static int tpm_tis_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int rc;
- if (tpm_dev.client != NULL)
+ struct device *dev = &(client->dev);
+
+ if (tpm_dev.client != NULL) {
+ dev_err(dev, "This driver only supports one client at a time\n");
return -EBUSY; /* We only support one client */
+ }
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
- dev_err(&client->dev,
- "no algorithms associated to the i2c bus\n");
+ dev_err(dev, "no algorithms associated to the i2c bus\n");
return -ENODEV;
}
@@ -682,7 +776,6 @@ static int tpm_tis_i2c_remove(struct i2c_client *client)
}
static struct i2c_driver tpm_tis_i2c_driver = {
-
.id_table = tpm_tis_i2c_table,
.probe = tpm_tis_i2c_probe,
.remove = tpm_tis_i2c_remove,
@@ -690,11 +783,12 @@ static struct i2c_driver tpm_tis_i2c_driver = {
.name = "tpm_i2c_infineon",
.owner = THIS_MODULE,
.pm = &tpm_tis_i2c_ops,
+ .of_match_table = of_match_ptr(tpm_tis_i2c_of_match),
},
};
module_i2c_driver(tpm_tis_i2c_driver);
MODULE_AUTHOR("Peter Huewe <peter.huewe@infineon.com>");
MODULE_DESCRIPTION("TPM TIS I2C Infineon Driver");
-MODULE_VERSION("2.1.5");
+MODULE_VERSION("2.2.0");
MODULE_LICENSE("GPL");
diff --git a/drivers/char/tpm/tpm_i2c_stm_st33.c b/drivers/char/tpm/tpm_i2c_stm_st33.c
index 1f5f71e14abe..5bb8e2ddd3b3 100644
--- a/drivers/char/tpm/tpm_i2c_stm_st33.c
+++ b/drivers/char/tpm/tpm_i2c_stm_st33.c
@@ -36,7 +36,6 @@
#include <linux/i2c.h>
#include <linux/fs.h>
#include <linux/miscdevice.h>
-#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/init.h>
@@ -50,7 +49,6 @@
#include <linux/uaccess.h>
#include <linux/io.h>
#include <linux/slab.h>
-#include <linux/sched.h>
#include "tpm.h"
#include "tpm_i2c_stm_st33.h"
@@ -178,7 +176,7 @@ static long _wait_for_interrupt_serirq_timeout(struct tpm_chip *chip,
struct i2c_client *client;
struct st33zp24_platform_data *pin_infos;
- client = (struct i2c_client *) TPM_VPRIV(chip);
+ client = (struct i2c_client *)TPM_VPRIV(chip);
pin_infos = client->dev.platform_data;
status = wait_for_completion_interruptible_timeout(
@@ -197,12 +195,12 @@ static int wait_for_serirq_timeout(struct tpm_chip *chip, bool condition,
int status = 2;
struct i2c_client *client;
- client = (struct i2c_client *) TPM_VPRIV(chip);
+ client = (struct i2c_client *)TPM_VPRIV(chip);
status = _wait_for_interrupt_serirq_timeout(chip, timeout);
if (!status) {
status = -EBUSY;
- } else{
+ } else {
clear_interruption(client);
if (condition)
status = 1;
@@ -219,7 +217,7 @@ static void tpm_stm_i2c_cancel(struct tpm_chip *chip)
struct i2c_client *client;
u8 data;
- client = (struct i2c_client *) TPM_VPRIV(chip);
+ client = (struct i2c_client *)TPM_VPRIV(chip);
data = TPM_STS_COMMAND_READY;
I2C_WRITE_DATA(client, TPM_STS, &data, 1);
@@ -236,7 +234,7 @@ static u8 tpm_stm_i2c_status(struct tpm_chip *chip)
{
struct i2c_client *client;
u8 data;
- client = (struct i2c_client *) TPM_VPRIV(chip);
+ client = (struct i2c_client *)TPM_VPRIV(chip);
I2C_READ_DATA(client, TPM_STS, &data, 1);
return data;
@@ -254,7 +252,7 @@ static int check_locality(struct tpm_chip *chip)
u8 data;
u8 status;
- client = (struct i2c_client *) TPM_VPRIV(chip);
+ client = (struct i2c_client *)TPM_VPRIV(chip);
status = I2C_READ_DATA(client, TPM_ACCESS, &data, 1);
if (status && (data &
@@ -278,7 +276,7 @@ static int request_locality(struct tpm_chip *chip)
struct i2c_client *client;
u8 data;
- client = (struct i2c_client *) TPM_VPRIV(chip);
+ client = (struct i2c_client *)TPM_VPRIV(chip);
if (check_locality(chip) == chip->vendor.locality)
return chip->vendor.locality;
@@ -294,7 +292,7 @@ static int request_locality(struct tpm_chip *chip)
chip->vendor.timeout_a);
if (rc > 0)
return chip->vendor.locality;
- } else{
+ } else {
stop = jiffies + chip->vendor.timeout_a;
do {
if (check_locality(chip) >= 0)
@@ -316,7 +314,7 @@ static void release_locality(struct tpm_chip *chip)
struct i2c_client *client;
u8 data;
- client = (struct i2c_client *) TPM_VPRIV(chip);
+ client = (struct i2c_client *)TPM_VPRIV(chip);
data = TPM_ACCESS_ACTIVE_LOCALITY;
I2C_WRITE_DATA(client, TPM_ACCESS, &data, 1);
@@ -333,7 +331,7 @@ static int get_burstcount(struct tpm_chip *chip)
int burstcnt, status;
u8 tpm_reg, temp;
- struct i2c_client *client = (struct i2c_client *) TPM_VPRIV(chip);
+ struct i2c_client *client = (struct i2c_client *)TPM_VPRIV(chip);
stop = jiffies + chip->vendor.timeout_d;
do {
@@ -379,7 +377,7 @@ static int wait_for_stat(struct tpm_chip *chip, u8 mask, unsigned long timeout,
mask), timeout);
if (rc > 0)
return 0;
- } else{
+ } else {
stop = jiffies + timeout;
do {
msleep(TPM_TIMEOUT);
@@ -403,7 +401,7 @@ static int recv_data(struct tpm_chip *chip, u8 *buf, size_t count)
int size = 0, burstcnt, len;
struct i2c_client *client;
- client = (struct i2c_client *) TPM_VPRIV(chip);
+ client = (struct i2c_client *)TPM_VPRIV(chip);
while (size < count &&
wait_for_stat(chip,
@@ -433,7 +431,7 @@ static irqreturn_t tpm_ioserirq_handler(int irq, void *dev_id)
disable_irq_nosync(irq);
- client = (struct i2c_client *) TPM_VPRIV(chip);
+ client = (struct i2c_client *)TPM_VPRIV(chip);
pin_infos = client->dev.platform_data;
complete(&pin_infos->irq_detection);
@@ -453,8 +451,7 @@ static irqreturn_t tpm_ioserirq_handler(int irq, void *dev_id)
static int tpm_stm_i2c_send(struct tpm_chip *chip, unsigned char *buf,
size_t len)
{
- u32 status,
- burstcnt = 0, i, size;
+ u32 status, burstcnt = 0, i, size;
int ret;
u8 data;
struct i2c_client *client;
@@ -483,7 +480,7 @@ static int tpm_stm_i2c_send(struct tpm_chip *chip, unsigned char *buf,
}
}
- for (i = 0 ; i < len - 1 ;) {
+ for (i = 0; i < len - 1;) {
burstcnt = get_burstcount(chip);
size = min_t(int, len - i - 1, burstcnt);
ret = I2C_WRITE_DATA(client, TPM_DATA_FIFO, buf, size);
@@ -547,7 +544,7 @@ static int tpm_stm_i2c_recv(struct tpm_chip *chip, unsigned char *buf,
goto out;
}
- expected = be32_to_cpu(*(__be32 *) (buf + 2));
+ expected = be32_to_cpu(*(__be32 *)(buf + 2));
if (expected > count) {
size = -EIO;
goto out;
@@ -569,7 +566,7 @@ out:
static bool tpm_st33_i2c_req_canceled(struct tpm_chip *chip, u8 status)
{
- return (status == TPM_STS_COMMAND_READY);
+ return (status == TPM_STS_COMMAND_READY);
}
static const struct file_operations tpm_st33_i2c_fops = {
@@ -617,7 +614,7 @@ static struct tpm_vendor_specific st_i2c_tpm = {
.miscdev = {.fops = &tpm_st33_i2c_fops,},
};
-static int interrupts ;
+static int interrupts;
module_param(interrupts, int, 0444);
MODULE_PARM_DESC(interrupts, "Enable interrupts");
@@ -714,7 +711,7 @@ tpm_st33_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id)
"TPM SERIRQ management", chip);
if (err < 0) {
dev_err(chip->dev , "TPM SERIRQ signals %d not available\n",
- gpio_to_irq(platform_data->io_serirq));
+ gpio_to_irq(platform_data->io_serirq));
goto _irq_set;
}
@@ -754,7 +751,7 @@ tpm_st33_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id)
dev_info(chip->dev, "TPM I2C Initialized\n");
return 0;
_irq_set:
- free_irq(gpio_to_irq(platform_data->io_serirq), (void *) chip);
+ free_irq(gpio_to_irq(platform_data->io_serirq), (void *)chip);
_gpio_init2:
if (interrupts)
gpio_free(platform_data->io_serirq);
@@ -784,7 +781,7 @@ static int tpm_st33_i2c_remove(struct i2c_client *client)
{
struct tpm_chip *chip = (struct tpm_chip *)i2c_get_clientdata(client);
struct st33zp24_platform_data *pin_infos =
- ((struct i2c_client *) TPM_VPRIV(chip))->dev.platform_data;
+ ((struct i2c_client *)TPM_VPRIV(chip))->dev.platform_data;
if (pin_infos != NULL) {
free_irq(pin_infos->io_serirq, chip);
@@ -823,9 +820,9 @@ static int tpm_st33_i2c_pm_suspend(struct device *dev)
struct st33zp24_platform_data *pin_infos = dev->platform_data;
int ret = 0;
- if (power_mgt)
+ if (power_mgt) {
gpio_set_value(pin_infos->io_lpcpd, 0);
- else{
+ } else {
if (chip->data_buffer == NULL)
chip->data_buffer = pin_infos->tpm_i2c_buffer[0];
ret = tpm_pm_suspend(dev);
@@ -851,12 +848,12 @@ static int tpm_st33_i2c_pm_resume(struct device *dev)
(chip->vendor.status(chip) &
TPM_STS_VALID) == TPM_STS_VALID,
chip->vendor.timeout_b);
- } else{
- if (chip->data_buffer == NULL)
- chip->data_buffer = pin_infos->tpm_i2c_buffer[0];
- ret = tpm_pm_resume(dev);
- if (!ret)
- tpm_do_selftest(chip);
+ } else {
+ if (chip->data_buffer == NULL)
+ chip->data_buffer = pin_infos->tpm_i2c_buffer[0];
+ ret = tpm_pm_resume(dev);
+ if (!ret)
+ tpm_do_selftest(chip);
}
return ret;
} /* tpm_st33_i2c_pm_resume() */
@@ -867,7 +864,8 @@ static const struct i2c_device_id tpm_st33_i2c_id[] = {
{}
};
MODULE_DEVICE_TABLE(i2c, tpm_st33_i2c_id);
-static SIMPLE_DEV_PM_OPS(tpm_st33_i2c_ops, tpm_st33_i2c_pm_suspend, tpm_st33_i2c_pm_resume);
+static SIMPLE_DEV_PM_OPS(tpm_st33_i2c_ops, tpm_st33_i2c_pm_suspend,
+ tpm_st33_i2c_pm_resume);
static struct i2c_driver tpm_st33_i2c_driver = {
.driver = {
.owner = THIS_MODULE,
diff --git a/drivers/char/tpm/tpm_ppi.c b/drivers/char/tpm/tpm_ppi.c
index 720ebcf29fdf..2168d15bc728 100644
--- a/drivers/char/tpm/tpm_ppi.c
+++ b/drivers/char/tpm/tpm_ppi.c
@@ -158,9 +158,9 @@ static ssize_t tpm_store_ppi_request(struct device *dev,
ACPI_TYPE_STRING);
if (ACPI_FAILURE(status))
return -ENOMEM;
- strncpy(version,
+ strlcpy(version,
((union acpi_object *)output.pointer)->string.pointer,
- PPI_VERSION_LEN);
+ PPI_VERSION_LEN + 1);
kfree(output.pointer);
output.length = ACPI_ALLOCATE_BUFFER;
output.pointer = NULL;
@@ -237,9 +237,9 @@ static ssize_t tpm_show_ppi_transition_action(struct device *dev,
ACPI_TYPE_STRING);
if (ACPI_FAILURE(status))
return -ENOMEM;
- strncpy(version,
+ strlcpy(version,
((union acpi_object *)output.pointer)->string.pointer,
- PPI_VERSION_LEN);
+ PPI_VERSION_LEN + 1);
/*
* PPI spec defines params[3].type as empty package, but some platforms
* (e.g. Capella with PPI 1.0) need integer/string/buffer type, so for
@@ -351,7 +351,7 @@ cleanup:
static ssize_t show_ppi_operations(char *buf, u32 start, u32 end)
{
char *str = buf;
- char version[PPI_VERSION_LEN];
+ char version[PPI_VERSION_LEN + 1];
acpi_handle handle;
acpi_status status;
struct acpi_object_list input;
@@ -381,9 +381,9 @@ static ssize_t show_ppi_operations(char *buf, u32 start, u32 end)
if (ACPI_FAILURE(status))
return -ENOMEM;
- strncpy(version,
+ strlcpy(version,
((union acpi_object *)output.pointer)->string.pointer,
- PPI_VERSION_LEN);
+ PPI_VERSION_LEN + 1);
kfree(output.pointer);
output.length = ACPI_ALLOCATE_BUFFER;
output.pointer = NULL;
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index eb494f6a4c6b..1bb071dca9ab 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -2385,10 +2385,9 @@ int nfs_clone_sb_security(struct super_block *s, struct dentry *mntroot,
struct nfs_mount_info *mount_info)
{
/* clone any lsm security options from the parent to the new sb */
- security_sb_clone_mnt_opts(mount_info->cloned->sb, s);
if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops)
return -ESTALE;
- return 0;
+ return security_sb_clone_mnt_opts(mount_info->cloned->sb, s);
}
EXPORT_SYMBOL_GPL(nfs_clone_sb_security);
diff --git a/include/linux/security.h b/include/linux/security.h
index 032c366ef1c6..4686491852a7 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -1440,7 +1440,7 @@ struct security_operations {
struct path *new_path);
int (*sb_set_mnt_opts) (struct super_block *sb,
struct security_mnt_opts *opts);
- void (*sb_clone_mnt_opts) (const struct super_block *oldsb,
+ int (*sb_clone_mnt_opts) (const struct super_block *oldsb,
struct super_block *newsb);
int (*sb_parse_opts_str) (char *options, struct security_mnt_opts *opts);
@@ -1726,7 +1726,7 @@ int security_sb_mount(const char *dev_name, struct path *path,
int security_sb_umount(struct vfsmount *mnt, int flags);
int security_sb_pivotroot(struct path *old_path, struct path *new_path);
int security_sb_set_mnt_opts(struct super_block *sb, struct security_mnt_opts *opts);
-void security_sb_clone_mnt_opts(const struct super_block *oldsb,
+int security_sb_clone_mnt_opts(const struct super_block *oldsb,
struct super_block *newsb);
int security_sb_parse_opts_str(char *options, struct security_mnt_opts *opts);
@@ -2016,9 +2016,11 @@ static inline int security_sb_set_mnt_opts(struct super_block *sb,
return 0;
}
-static inline void security_sb_clone_mnt_opts(const struct super_block *oldsb,
+static inline int security_sb_clone_mnt_opts(const struct super_block *oldsb,
struct super_block *newsb)
-{ }
+{
+ return 0;
+}
static inline int security_sb_parse_opts_str(char *options, struct security_mnt_opts *opts)
{
diff --git a/include/uapi/linux/magic.h b/include/uapi/linux/magic.h
index 873e086ce3a1..249df3720be2 100644
--- a/include/uapi/linux/magic.h
+++ b/include/uapi/linux/magic.h
@@ -11,6 +11,7 @@
#define DEBUGFS_MAGIC 0x64626720
#define SECURITYFS_MAGIC 0x73636673
#define SELINUX_MAGIC 0xf97cff8c
+#define SMACK_MAGIC 0x43415d53 /* "SMAC" */
#define RAMFS_MAGIC 0x858458f6 /* some random number */
#define TMPFS_MAGIC 0x01021994
#define HUGETLBFS_MAGIC 0x958458f6 /* some random number */
diff --git a/kernel/seccomp.c b/kernel/seccomp.c
index 5af44b593770..b7a10048a32c 100644
--- a/kernel/seccomp.c
+++ b/kernel/seccomp.c
@@ -160,6 +160,8 @@ static int seccomp_check_filter(struct sock_filter *filter, unsigned int flen)
case BPF_S_ALU_AND_X:
case BPF_S_ALU_OR_K:
case BPF_S_ALU_OR_X:
+ case BPF_S_ALU_XOR_K:
+ case BPF_S_ALU_XOR_X:
case BPF_S_ALU_LSH_K:
case BPF_S_ALU_LSH_X:
case BPF_S_ALU_RSH_K:
diff --git a/security/capability.c b/security/capability.c
index 6783c3e6c88e..1728d4e375db 100644
--- a/security/capability.c
+++ b/security/capability.c
@@ -98,9 +98,10 @@ static int cap_sb_set_mnt_opts(struct super_block *sb,
return 0;
}
-static void cap_sb_clone_mnt_opts(const struct super_block *oldsb,
+static int cap_sb_clone_mnt_opts(const struct super_block *oldsb,
struct super_block *newsb)
{
+ return 0;
}
static int cap_sb_parse_opts_str(char *options, struct security_mnt_opts *opts)
diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
index 3b3b7e6bf8da..6c491a63128e 100644
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -189,11 +189,9 @@ static int process_measurement(struct file *file, const char *filename,
if (rc != 0)
goto out_digsig;
- if (function != BPRM_CHECK)
- pathname = ima_d_path(&file->f_path, &pathbuf);
-
+ pathname = !filename ? ima_d_path(&file->f_path, &pathbuf) : filename;
if (!pathname)
- pathname = filename;
+ pathname = (const char *)file->f_dentry->d_name.name;
if (action & IMA_MEASURE)
ima_store_measurement(iint, file, pathname);
@@ -226,8 +224,7 @@ out:
int ima_file_mmap(struct file *file, unsigned long prot)
{
if (file && (prot & PROT_EXEC))
- return process_measurement(file, file->f_dentry->d_name.name,
- MAY_EXEC, MMAP_CHECK);
+ return process_measurement(file, NULL, MAY_EXEC, MMAP_CHECK);
return 0;
}
@@ -265,7 +262,7 @@ int ima_bprm_check(struct linux_binprm *bprm)
int ima_file_check(struct file *file, int mask)
{
ima_rdwr_violation_check(file);
- return process_measurement(file, file->f_dentry->d_name.name,
+ return process_measurement(file, NULL,
mask & (MAY_READ | MAY_WRITE | MAY_EXEC),
FILE_CHECK);
}
@@ -290,8 +287,7 @@ int ima_module_check(struct file *file)
#endif
return 0; /* We rely on module signature checking */
}
- return process_measurement(file, file->f_dentry->d_name.name,
- MAY_EXEC, MODULE_CHECK);
+ return process_measurement(file, NULL, MAY_EXEC, MODULE_CHECK);
}
static int __init init_ima(void)
diff --git a/security/security.c b/security/security.c
index 03f248b84e9f..a3dce87d1aef 100644
--- a/security/security.c
+++ b/security/security.c
@@ -299,10 +299,10 @@ int security_sb_set_mnt_opts(struct super_block *sb,
}
EXPORT_SYMBOL(security_sb_set_mnt_opts);
-void security_sb_clone_mnt_opts(const struct super_block *oldsb,
+int security_sb_clone_mnt_opts(const struct super_block *oldsb,
struct super_block *newsb)
{
- security_ops->sb_clone_mnt_opts(oldsb, newsb);
+ return security_ops->sb_clone_mnt_opts(oldsb, newsb);
}
EXPORT_SYMBOL(security_sb_clone_mnt_opts);
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 7171a957b933..feb2f42c5a07 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -751,7 +751,37 @@ out_double_mount:
goto out;
}
-static void selinux_sb_clone_mnt_opts(const struct super_block *oldsb,
+static int selinux_cmp_sb_context(const struct super_block *oldsb,
+ const struct super_block *newsb)
+{
+ struct superblock_security_struct *old = oldsb->s_security;
+ struct superblock_security_struct *new = newsb->s_security;
+ char oldflags = old->flags & SE_MNTMASK;
+ char newflags = new->flags & SE_MNTMASK;
+
+ if (oldflags != newflags)
+ goto mismatch;
+ if ((oldflags & FSCONTEXT_MNT) && old->sid != new->sid)
+ goto mismatch;
+ if ((oldflags & CONTEXT_MNT) && old->mntpoint_sid != new->mntpoint_sid)
+ goto mismatch;
+ if ((oldflags & DEFCONTEXT_MNT) && old->def_sid != new->def_sid)
+ goto mismatch;
+ if (oldflags & ROOTCONTEXT_MNT) {
+ struct inode_security_struct *oldroot = oldsb->s_root->d_inode->i_security;
+ struct inode_security_struct *newroot = newsb->s_root->d_inode->i_security;
+ if (oldroot->sid != newroot->sid)
+ goto mismatch;
+ }
+ return 0;
+mismatch:
+ printk(KERN_WARNING "SELinux: mount invalid. Same superblock, "
+ "different security settings for (dev %s, "
+ "type %s)\n", newsb->s_id, newsb->s_type->name);
+ return -EBUSY;
+}
+
+static int selinux_sb_clone_mnt_opts(const struct super_block *oldsb,
struct super_block *newsb)
{
const struct superblock_security_struct *oldsbsec = oldsb->s_security;
@@ -766,14 +796,14 @@ static void selinux_sb_clone_mnt_opts(const struct super_block *oldsb,
* mount options. thus we can safely deal with this superblock later
*/
if (!ss_initialized)
- return;
+ return 0;
/* how can we clone if the old one wasn't set up?? */
BUG_ON(!(oldsbsec->flags & SE_SBINITIALIZED));
- /* if fs is reusing a sb, just let its options stand... */
+ /* if fs is reusing a sb, make sure that the contexts match */
if (newsbsec->flags & SE_SBINITIALIZED)
- return;
+ return selinux_cmp_sb_context(oldsb, newsb);
mutex_lock(&newsbsec->lock);
@@ -806,6 +836,7 @@ static void selinux_sb_clone_mnt_opts(const struct super_block *oldsb,
sb_finish_set_opts(newsb);
mutex_unlock(&newsbsec->lock);
+ return 0;
}
static int selinux_parse_opts_str(char *options,
diff --git a/security/smack/smack.h b/security/smack/smack.h
index 99b36124f712..8ad30955e15d 100644
--- a/security/smack/smack.h
+++ b/security/smack/smack.h
@@ -149,11 +149,6 @@ struct smack_known {
#define SMACK_CIPSO_SOCKET 1
/*
- * smackfs magic number
- */
-#define SMACK_MAGIC 0x43415d53 /* "SMAC" */
-
-/*
* CIPSO defaults.
*/
#define SMACK_CIPSO_DOI_DEFAULT 3 /* Historical */
diff --git a/security/smack/smack_access.c b/security/smack/smack_access.c
index db14689a21e0..2e397a88d410 100644
--- a/security/smack/smack_access.c
+++ b/security/smack/smack_access.c
@@ -252,6 +252,8 @@ static inline void smack_str_from_perm(char *string, int access)
string[i++] = 'x';
if (access & MAY_APPEND)
string[i++] = 'a';
+ if (access & MAY_TRANSMUTE)
+ string[i++] = 't';
string[i] = '\0';
}
/**
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index fa64740abb59..d52c780bdb78 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -654,7 +654,7 @@ static int smack_inode_unlink(struct inode *dir, struct dentry *dentry)
/*
* You also need write access to the containing directory
*/
- smk_ad_setfield_u_fs_path_dentry(&ad, NULL);
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_INODE);
smk_ad_setfield_u_fs_inode(&ad, dir);
rc = smk_curacc(smk_of_inode(dir), MAY_WRITE, &ad);
}
@@ -685,7 +685,7 @@ static int smack_inode_rmdir(struct inode *dir, struct dentry *dentry)
/*
* You also need write access to the containing directory
*/
- smk_ad_setfield_u_fs_path_dentry(&ad, NULL);
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_INODE);
smk_ad_setfield_u_fs_inode(&ad, dir);
rc = smk_curacc(smk_of_inode(dir), MAY_WRITE, &ad);
}
diff --git a/security/smack/smackfs.c b/security/smack/smackfs.c
index 76a5dca46404..53a08b85bda4 100644
--- a/security/smack/smackfs.c
+++ b/security/smack/smackfs.c
@@ -26,6 +26,7 @@
#include <linux/seq_file.h>
#include <linux/ctype.h>
#include <linux/audit.h>
+#include <linux/magic.h>
#include "smack.h"
/*
@@ -50,12 +51,12 @@ enum smk_inos {
SMK_ACCESS2 = 16, /* make an access check with long labels */
SMK_CIPSO2 = 17, /* load long label -> CIPSO mapping */
SMK_REVOKE_SUBJ = 18, /* set rules with subject label to '-' */
+ SMK_CHANGE_RULE = 19, /* change or add rules (long labels) */
};
/*
* List locks
*/
-static DEFINE_MUTEX(smack_list_lock);
static DEFINE_MUTEX(smack_cipso_lock);
static DEFINE_MUTEX(smack_ambient_lock);
static DEFINE_MUTEX(smk_netlbladdr_lock);
@@ -110,6 +111,13 @@ struct smack_master_list {
LIST_HEAD(smack_rule_list);
+struct smack_parsed_rule {
+ char *smk_subject;
+ char *smk_object;
+ int smk_access1;
+ int smk_access2;
+};
+
static int smk_cipso_doi_value = SMACK_CIPSO_DOI_DEFAULT;
const char *smack_cipso_option = SMACK_CIPSO_OPTION;
@@ -167,25 +175,28 @@ static void smk_netlabel_audit_set(struct netlbl_audit *nap)
#define SMK_NETLBLADDRMIN 9
/**
- * smk_set_access - add a rule to the rule list
- * @srp: the new rule to add
+ * smk_set_access - add a rule to the rule list or replace an old rule
+ * @srp: the rule to add or replace
* @rule_list: the list of rules
* @rule_lock: the rule list lock
+ * @global: if non-zero, indicates a global rule
*
* Looks through the current subject/object/access list for
* the subject/object pair and replaces the access that was
* there. If the pair isn't found add it with the specified
* access.
*
- * Returns 1 if a rule was found to exist already, 0 if it is new
* Returns 0 if nothing goes wrong or -ENOMEM if it fails
* during the allocation of the new pair to add.
*/
-static int smk_set_access(struct smack_rule *srp, struct list_head *rule_list,
- struct mutex *rule_lock)
+static int smk_set_access(struct smack_parsed_rule *srp,
+ struct list_head *rule_list,
+ struct mutex *rule_lock, int global)
{
struct smack_rule *sp;
+ struct smack_master_list *smlp;
int found = 0;
+ int rc = 0;
mutex_lock(rule_lock);
@@ -197,23 +208,89 @@ static int smk_set_access(struct smack_rule *srp, struct list_head *rule_list,
if (sp->smk_object == srp->smk_object &&
sp->smk_subject == srp->smk_subject) {
found = 1;
- sp->smk_access = srp->smk_access;
+ sp->smk_access |= srp->smk_access1;
+ sp->smk_access &= ~srp->smk_access2;
break;
}
}
- if (found == 0)
- list_add_rcu(&srp->list, rule_list);
+ if (found == 0) {
+ sp = kzalloc(sizeof(*sp), GFP_KERNEL);
+ if (sp == NULL) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ sp->smk_subject = srp->smk_subject;
+ sp->smk_object = srp->smk_object;
+ sp->smk_access = srp->smk_access1 & ~srp->smk_access2;
+
+ list_add_rcu(&sp->list, rule_list);
+ /*
+ * If this is a global as opposed to self and a new rule
+ * it needs to get added for reporting.
+ */
+ if (global) {
+ smlp = kzalloc(sizeof(*smlp), GFP_KERNEL);
+ if (smlp != NULL) {
+ smlp->smk_rule = sp;
+ list_add_rcu(&smlp->list, &smack_rule_list);
+ } else
+ rc = -ENOMEM;
+ }
+ }
+
+out:
mutex_unlock(rule_lock);
+ return rc;
+}
+
+/**
+ * smk_perm_from_str - parse smack accesses from a text string
+ * @string: a text string that contains a Smack accesses code
+ *
+ * Returns an integer with respective bits set for specified accesses.
+ */
+static int smk_perm_from_str(const char *string)
+{
+ int perm = 0;
+ const char *cp;
- return found;
+ for (cp = string; ; cp++)
+ switch (*cp) {
+ case '-':
+ break;
+ case 'r':
+ case 'R':
+ perm |= MAY_READ;
+ break;
+ case 'w':
+ case 'W':
+ perm |= MAY_WRITE;
+ break;
+ case 'x':
+ case 'X':
+ perm |= MAY_EXEC;
+ break;
+ case 'a':
+ case 'A':
+ perm |= MAY_APPEND;
+ break;
+ case 't':
+ case 'T':
+ perm |= MAY_TRANSMUTE;
+ break;
+ default:
+ return perm;
+ }
}
/**
* smk_fill_rule - Fill Smack rule from strings
* @subject: subject label string
* @object: object label string
- * @access: access string
+ * @access1: access string
+ * @access2: string with permissions to be removed
* @rule: Smack rule
* @import: if non-zero, import labels
* @len: label length limit
@@ -221,8 +298,9 @@ static int smk_set_access(struct smack_rule *srp, struct list_head *rule_list,
* Returns 0 on success, -1 on failure
*/
static int smk_fill_rule(const char *subject, const char *object,
- const char *access, struct smack_rule *rule,
- int import, int len)
+ const char *access1, const char *access2,
+ struct smack_parsed_rule *rule, int import,
+ int len)
{
const char *cp;
struct smack_known *skp;
@@ -255,36 +333,11 @@ static int smk_fill_rule(const char *subject, const char *object,
rule->smk_object = skp->smk_known;
}
- rule->smk_access = 0;
-
- for (cp = access; *cp != '\0'; cp++) {
- switch (*cp) {
- case '-':
- break;
- case 'r':
- case 'R':
- rule->smk_access |= MAY_READ;
- break;
- case 'w':
- case 'W':
- rule->smk_access |= MAY_WRITE;
- break;
- case 'x':
- case 'X':
- rule->smk_access |= MAY_EXEC;
- break;
- case 'a':
- case 'A':
- rule->smk_access |= MAY_APPEND;
- break;
- case 't':
- case 'T':
- rule->smk_access |= MAY_TRANSMUTE;
- break;
- default:
- return 0;
- }
- }
+ rule->smk_access1 = smk_perm_from_str(access1);
+ if (access2)
+ rule->smk_access2 = smk_perm_from_str(access2);
+ else
+ rule->smk_access2 = ~rule->smk_access1;
return 0;
}
@@ -297,30 +350,33 @@ static int smk_fill_rule(const char *subject, const char *object,
*
* Returns 0 on success, -1 on errors.
*/
-static int smk_parse_rule(const char *data, struct smack_rule *rule, int import)
+static int smk_parse_rule(const char *data, struct smack_parsed_rule *rule,
+ int import)
{
int rc;
rc = smk_fill_rule(data, data + SMK_LABELLEN,
- data + SMK_LABELLEN + SMK_LABELLEN, rule, import,
- SMK_LABELLEN);
+ data + SMK_LABELLEN + SMK_LABELLEN, NULL, rule,
+ import, SMK_LABELLEN);
return rc;
}
/**
* smk_parse_long_rule - parse Smack rule from rule string
* @data: string to be parsed, null terminated
- * @rule: Smack rule
+ * @rule: Will be filled with Smack parsed rule
* @import: if non-zero, import labels
+ * @change: if non-zero, data is from /smack/change-rule
*
* Returns 0 on success, -1 on failure
*/
-static int smk_parse_long_rule(const char *data, struct smack_rule *rule,
- int import)
+static int smk_parse_long_rule(const char *data, struct smack_parsed_rule *rule,
+ int import, int change)
{
char *subject;
char *object;
- char *access;
+ char *access1;
+ char *access2;
int datalen;
int rc = -1;
@@ -334,14 +390,27 @@ static int smk_parse_long_rule(const char *data, struct smack_rule *rule,
object = kzalloc(datalen, GFP_KERNEL);
if (object == NULL)
goto free_out_s;
- access = kzalloc(datalen, GFP_KERNEL);
- if (access == NULL)
+ access1 = kzalloc(datalen, GFP_KERNEL);
+ if (access1 == NULL)
goto free_out_o;
+ access2 = kzalloc(datalen, GFP_KERNEL);
+ if (access2 == NULL)
+ goto free_out_a;
+
+ if (change) {
+ if (sscanf(data, "%s %s %s %s",
+ subject, object, access1, access2) == 4)
+ rc = smk_fill_rule(subject, object, access1, access2,
+ rule, import, 0);
+ } else {
+ if (sscanf(data, "%s %s %s", subject, object, access1) == 3)
+ rc = smk_fill_rule(subject, object, access1, NULL,
+ rule, import, 0);
+ }
- if (sscanf(data, "%s %s %s", subject, object, access) == 3)
- rc = smk_fill_rule(subject, object, access, rule, import, 0);
-
- kfree(access);
+ kfree(access2);
+free_out_a:
+ kfree(access1);
free_out_o:
kfree(object);
free_out_s:
@@ -351,6 +420,7 @@ free_out_s:
#define SMK_FIXED24_FMT 0 /* Fixed 24byte label format */
#define SMK_LONG_FMT 1 /* Variable long label format */
+#define SMK_CHANGE_FMT 2 /* Rule modification format */
/**
* smk_write_rules_list - write() for any /smack rule file
* @file: file pointer, not actually used
@@ -359,22 +429,24 @@ free_out_s:
* @ppos: where to start - must be 0
* @rule_list: the list of rules to write to
* @rule_lock: lock for the rule list
- * @format: /smack/load or /smack/load2 format.
+ * @format: /smack/load or /smack/load2 or /smack/change-rule format.
*
* Get one smack access rule from above.
* The format for SMK_LONG_FMT is:
* "subject<whitespace>object<whitespace>access[<whitespace>...]"
* The format for SMK_FIXED24_FMT is exactly:
* "subject object rwxat"
+ * The format for SMK_CHANGE_FMT is:
+ * "subject<whitespace>object<whitespace>
+ * acc_enable<whitespace>acc_disable[<whitespace>...]"
*/
static ssize_t smk_write_rules_list(struct file *file, const char __user *buf,
size_t count, loff_t *ppos,
struct list_head *rule_list,
struct mutex *rule_lock, int format)
{
- struct smack_master_list *smlp;
struct smack_known *skp;
- struct smack_rule *rule;
+ struct smack_parsed_rule *rule;
char *data;
int datalen;
int rc = -EINVAL;
@@ -417,7 +489,11 @@ static ssize_t smk_write_rules_list(struct file *file, const char __user *buf,
* Be sure the data string is terminated.
*/
data[count] = '\0';
- if (smk_parse_long_rule(data, rule, 1))
+ if (smk_parse_long_rule(data, rule, 1, 0))
+ goto out_free_rule;
+ } else if (format == SMK_CHANGE_FMT) {
+ data[count] = '\0';
+ if (smk_parse_long_rule(data, rule, 1, 1))
goto out_free_rule;
} else {
/*
@@ -437,22 +513,9 @@ static ssize_t smk_write_rules_list(struct file *file, const char __user *buf,
rule_lock = &skp->smk_rules_lock;
}
- rc = count;
- /*
- * If this is a global as opposed to self and a new rule
- * it needs to get added for reporting.
- * smk_set_access returns true if there was already a rule
- * for the subject/object pair, and false if it was new.
- */
- if (!smk_set_access(rule, rule_list, rule_lock)) {
- if (load) {
- smlp = kzalloc(sizeof(*smlp), GFP_KERNEL);
- if (smlp != NULL) {
- smlp->smk_rule = rule;
- list_add_rcu(&smlp->list, &smack_rule_list);
- } else
- rc = -ENOMEM;
- }
+ rc = smk_set_access(rule, rule_list, rule_lock, load);
+ if (rc == 0) {
+ rc = count;
goto out;
}
@@ -1774,7 +1837,7 @@ static const struct file_operations smk_load_self_ops = {
static ssize_t smk_user_access(struct file *file, const char __user *buf,
size_t count, loff_t *ppos, int format)
{
- struct smack_rule rule;
+ struct smack_parsed_rule rule;
char *data;
char *cod;
int res;
@@ -1796,14 +1859,14 @@ static ssize_t smk_user_access(struct file *file, const char __user *buf,
return -ENOMEM;
memcpy(cod, data, count);
cod[count] = '\0';
- res = smk_parse_long_rule(cod, &rule, 0);
+ res = smk_parse_long_rule(cod, &rule, 0, 0);
kfree(cod);
}
if (res)
return -EINVAL;
- res = smk_access(rule.smk_subject, rule.smk_object, rule.smk_access,
+ res = smk_access(rule.smk_subject, rule.smk_object, rule.smk_access1,
NULL);
data[0] = res == 0 ? '1' : '0';
data[1] = '\0';
@@ -2035,10 +2098,8 @@ static ssize_t smk_write_revoke_subj(struct file *file, const char __user *buf,
}
skp = smk_find_entry(cp);
- if (skp == NULL) {
- rc = -EINVAL;
+ if (skp == NULL)
goto free_out;
- }
rule_list = &skp->smk_rules;
rule_lock = &skp->smk_rules_lock;
@@ -2077,6 +2138,33 @@ static int smk_init_sysfs(void)
}
/**
+ * smk_write_change_rule - write() for /smack/change-rule
+ * @file: file pointer
+ * @buf: data from user space
+ * @count: bytes sent
+ * @ppos: where to start - must be 0
+ */
+static ssize_t smk_write_change_rule(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ /*
+ * Must have privilege.
+ */
+ if (!capable(CAP_MAC_ADMIN))
+ return -EPERM;
+
+ return smk_write_rules_list(file, buf, count, ppos, NULL, NULL,
+ SMK_CHANGE_FMT);
+}
+
+static const struct file_operations smk_change_rule_ops = {
+ .write = smk_write_change_rule,
+ .read = simple_transaction_read,
+ .release = simple_transaction_release,
+ .llseek = generic_file_llseek,
+};
+
+/**
* smk_fill_super - fill the /smackfs superblock
* @sb: the empty superblock
* @data: unused
@@ -2125,6 +2213,8 @@ static int smk_fill_super(struct super_block *sb, void *data, int silent)
[SMK_REVOKE_SUBJ] = {
"revoke-subject", &smk_revoke_subj_ops,
S_IRUGO|S_IWUSR},
+ [SMK_CHANGE_RULE] = {
+ "change-rule", &smk_change_rule_ops, S_IRUGO|S_IWUSR},
/* last one */
{""}
};
diff --git a/security/tomoyo/tomoyo.c b/security/tomoyo/tomoyo.c
index a2ee362546ab..f0b756e27fed 100644
--- a/security/tomoyo/tomoyo.c
+++ b/security/tomoyo/tomoyo.c
@@ -536,7 +536,7 @@ static struct security_operations tomoyo_security_ops = {
};
/* Lock for GC. */
-struct srcu_struct tomoyo_ss;
+DEFINE_SRCU(tomoyo_ss);
/**
* tomoyo_init - Register TOMOYO Linux as a LSM module.
@@ -550,8 +550,7 @@ static int __init tomoyo_init(void)
if (!security_module_enable(&tomoyo_security_ops))
return 0;
/* register ourselves with the security framework */
- if (register_security(&tomoyo_security_ops) ||
- init_srcu_struct(&tomoyo_ss))
+ if (register_security(&tomoyo_security_ops))
panic("Failure registering TOMOYO Linux");
printk(KERN_INFO "TOMOYO Linux initialized\n");
cred->security = &tomoyo_kernel_domain;