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-rw-r--r--security/smack/smackfs.c114
-rw-r--r--security/tomoyo/securityfs_if.c11
2 files changed, 35 insertions, 90 deletions
diff --git a/security/smack/smackfs.c b/security/smack/smackfs.c
index 94bd9e41c9ec..e249a66db533 100644
--- a/security/smack/smackfs.c
+++ b/security/smack/smackfs.c
@@ -497,14 +497,9 @@ static ssize_t smk_write_rules_list(struct file *file, const char __user *buf,
}
}
- data = kmalloc(count + 1, GFP_KERNEL);
- if (data == NULL)
- return -ENOMEM;
-
- if (copy_from_user(data, buf, count) != 0) {
- rc = -EFAULT;
- goto out;
- }
+ data = memdup_user_nul(buf, count);
+ if (IS_ERR(data))
+ return PTR_ERR(data);
/*
* In case of parsing only part of user buf,
@@ -884,16 +879,10 @@ static ssize_t smk_set_cipso(struct file *file, const char __user *buf,
(count < SMK_CIPSOMIN || count > SMK_CIPSOMAX))
return -EINVAL;
- data = kzalloc(count + 1, GFP_KERNEL);
- if (data == NULL)
- return -ENOMEM;
-
- if (copy_from_user(data, buf, count) != 0) {
- rc = -EFAULT;
- goto unlockedout;
- }
+ data = memdup_user_nul(buf, count);
+ if (IS_ERR(data))
+ return PTR_ERR(data);
- data[count] = '\0';
rule = data;
/*
* Only allow one writer at a time. Writes should be
@@ -946,7 +935,6 @@ static ssize_t smk_set_cipso(struct file *file, const char __user *buf,
out:
mutex_unlock(&smack_cipso_lock);
-unlockedout:
kfree(data);
return rc;
}
@@ -1187,14 +1175,9 @@ static ssize_t smk_write_net4addr(struct file *file, const char __user *buf,
if (count < SMK_NETLBLADDRMIN)
return -EINVAL;
- data = kzalloc(count + 1, GFP_KERNEL);
- if (data == NULL)
- return -ENOMEM;
-
- if (copy_from_user(data, buf, count) != 0) {
- rc = -EFAULT;
- goto free_data_out;
- }
+ data = memdup_user_nul(buf, count);
+ if (IS_ERR(data))
+ return PTR_ERR(data);
smack = kzalloc(count + 1, GFP_KERNEL);
if (smack == NULL) {
@@ -1202,8 +1185,6 @@ static ssize_t smk_write_net4addr(struct file *file, const char __user *buf,
goto free_data_out;
}
- data[count] = '\0';
-
rc = sscanf(data, "%hhd.%hhd.%hhd.%hhd/%u %s",
&host[0], &host[1], &host[2], &host[3], &masks, smack);
if (rc != 6) {
@@ -1454,14 +1435,9 @@ static ssize_t smk_write_net6addr(struct file *file, const char __user *buf,
if (count < SMK_NETLBLADDRMIN)
return -EINVAL;
- data = kzalloc(count + 1, GFP_KERNEL);
- if (data == NULL)
- return -ENOMEM;
-
- if (copy_from_user(data, buf, count) != 0) {
- rc = -EFAULT;
- goto free_data_out;
- }
+ data = memdup_user_nul(buf, count);
+ if (IS_ERR(data))
+ return PTR_ERR(data);
smack = kzalloc(count + 1, GFP_KERNEL);
if (smack == NULL) {
@@ -1469,8 +1445,6 @@ static ssize_t smk_write_net6addr(struct file *file, const char __user *buf,
goto free_data_out;
}
- data[count] = '\0';
-
i = sscanf(data, "%x:%x:%x:%x:%x:%x:%x:%x/%u %s",
&scanned[0], &scanned[1], &scanned[2], &scanned[3],
&scanned[4], &scanned[5], &scanned[6], &scanned[7],
@@ -1865,14 +1839,9 @@ static ssize_t smk_write_ambient(struct file *file, const char __user *buf,
if (!smack_privileged(CAP_MAC_ADMIN))
return -EPERM;
- data = kzalloc(count + 1, GFP_KERNEL);
- if (data == NULL)
- return -ENOMEM;
-
- if (copy_from_user(data, buf, count) != 0) {
- rc = -EFAULT;
- goto out;
- }
+ data = memdup_user_nul(buf, count);
+ if (IS_ERR(data))
+ return PTR_ERR(data);
skp = smk_import_entry(data, count);
if (IS_ERR(skp)) {
@@ -2041,14 +2010,9 @@ static ssize_t smk_write_onlycap(struct file *file, const char __user *buf,
if (!smack_privileged(CAP_MAC_ADMIN))
return -EPERM;
- data = kzalloc(count + 1, GFP_KERNEL);
- if (data == NULL)
- return -ENOMEM;
-
- if (copy_from_user(data, buf, count) != 0) {
- kfree(data);
- return -EFAULT;
- }
+ data = memdup_user_nul(buf, count);
+ if (IS_ERR(data))
+ return PTR_ERR(data);
rc = smk_parse_label_list(data, &list_tmp);
kfree(data);
@@ -2133,14 +2097,9 @@ static ssize_t smk_write_unconfined(struct file *file, const char __user *buf,
if (!smack_privileged(CAP_MAC_ADMIN))
return -EPERM;
- data = kzalloc(count + 1, GFP_KERNEL);
- if (data == NULL)
- return -ENOMEM;
-
- if (copy_from_user(data, buf, count) != 0) {
- rc = -EFAULT;
- goto freeout;
- }
+ data = memdup_user_nul(buf, count);
+ if (IS_ERR(data))
+ return PTR_ERR(data);
/*
* Clear the smack_unconfined on invalid label errors. This means
@@ -2696,19 +2655,15 @@ static ssize_t smk_write_syslog(struct file *file, const char __user *buf,
if (!smack_privileged(CAP_MAC_ADMIN))
return -EPERM;
- data = kzalloc(count + 1, GFP_KERNEL);
- if (data == NULL)
- return -ENOMEM;
+ data = memdup_user_nul(buf, count);
+ if (IS_ERR(data))
+ return PTR_ERR(data);
- if (copy_from_user(data, buf, count) != 0)
- rc = -EFAULT;
- else {
- skp = smk_import_entry(data, count);
- if (IS_ERR(skp))
- rc = PTR_ERR(skp);
- else
- smack_syslog_label = skp;
- }
+ skp = smk_import_entry(data, count);
+ if (IS_ERR(skp))
+ rc = PTR_ERR(skp);
+ else
+ smack_syslog_label = skp;
kfree(data);
return rc;
@@ -2798,14 +2753,9 @@ static ssize_t smk_write_relabel_self(struct file *file, const char __user *buf,
if (*ppos != 0)
return -EINVAL;
- data = kzalloc(count + 1, GFP_KERNEL);
- if (data == NULL)
- return -ENOMEM;
-
- if (copy_from_user(data, buf, count) != 0) {
- kfree(data);
- return -EFAULT;
- }
+ data = memdup_user_nul(buf, count);
+ if (IS_ERR(data))
+ return PTR_ERR(data);
rc = smk_parse_label_list(data, &list_tmp);
kfree(data);
diff --git a/security/tomoyo/securityfs_if.c b/security/tomoyo/securityfs_if.c
index 179a955b319d..06ab41b1ff28 100644
--- a/security/tomoyo/securityfs_if.c
+++ b/security/tomoyo/securityfs_if.c
@@ -43,13 +43,9 @@ static ssize_t tomoyo_write_self(struct file *file, const char __user *buf,
int error;
if (!count || count >= TOMOYO_EXEC_TMPSIZE - 10)
return -ENOMEM;
- data = kzalloc(count + 1, GFP_NOFS);
- if (!data)
- return -ENOMEM;
- if (copy_from_user(data, buf, count)) {
- error = -EFAULT;
- goto out;
- }
+ data = memdup_user_nul(buf, count);
+ if (IS_ERR(data))
+ return PTR_ERR(data);
tomoyo_normalize_line(data);
if (tomoyo_correct_domain(data)) {
const int idx = tomoyo_read_lock();
@@ -87,7 +83,6 @@ static ssize_t tomoyo_write_self(struct file *file, const char __user *buf,
tomoyo_read_unlock(idx);
} else
error = -EINVAL;
-out:
kfree(data);
return error ? error : count;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-30 17:29:56 +0000