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-rw-r--r--security/integrity/ima/ima.h3
-rw-r--r--security/integrity/ima/ima_api.c2
-rw-r--r--security/integrity/ima/ima_iint.c11
-rw-r--r--security/integrity/ima/ima_main.c35
4 files changed, 17 insertions, 34 deletions
diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h
index b546b90f5fa..27849e1656d 100644
--- a/security/integrity/ima/ima.h
+++ b/security/integrity/ima/ima.h
@@ -70,6 +70,7 @@ int ima_init(void);
void ima_cleanup(void);
int ima_fs_init(void);
void ima_fs_cleanup(void);
+int ima_inode_alloc(struct inode *inode);
int ima_add_template_entry(struct ima_template_entry *entry, int violation,
const char *op, struct inode *inode);
int ima_calc_hash(struct file *file, char *digest);
@@ -106,8 +107,6 @@ struct ima_iint_cache {
unsigned char flags;
u8 digest[IMA_DIGEST_SIZE];
struct mutex mutex; /* protects: version, flags, digest */
- /* protected by inode->i_lock */
- unsigned int readcount; /* measured files readcount */
struct kref refcount; /* ima_iint_cache reference count */
};
diff --git a/security/integrity/ima/ima_api.c b/security/integrity/ima/ima_api.c
index 52015d098fd..d3963de6003 100644
--- a/security/integrity/ima/ima_api.c
+++ b/security/integrity/ima/ima_api.c
@@ -116,7 +116,7 @@ int ima_must_measure(struct ima_iint_cache *iint, struct inode *inode,
{
int must_measure;
- if (iint->flags & IMA_MEASURED)
+ if (iint && iint->flags & IMA_MEASURED)
return 1;
must_measure = ima_match_policy(inode, function, mask);
diff --git a/security/integrity/ima/ima_iint.c b/security/integrity/ima/ima_iint.c
index e68891f8d55..0936a7197e4 100644
--- a/security/integrity/ima/ima_iint.c
+++ b/security/integrity/ima/ima_iint.c
@@ -124,11 +124,6 @@ void iint_free(struct kref *kref)
refcount);
iint->version = 0;
iint->flags = 0UL;
- if (iint->readcount != 0) {
- printk(KERN_INFO "%s: readcount: %u\n", __func__,
- iint->readcount);
- iint->readcount = 0;
- }
kref_init(&iint->refcount);
kmem_cache_free(iint_cache, iint);
}
@@ -143,6 +138,11 @@ void ima_inode_free(struct inode *inode)
{
struct ima_iint_cache *iint;
+ if (inode->i_readcount)
+ printk(KERN_INFO "%s: readcount: %u\n", __func__, inode->i_readcount);
+
+ inode->i_readcount = 0;
+
spin_lock(&ima_iint_lock);
iint = __ima_iint_find(inode);
if (iint)
@@ -160,7 +160,6 @@ static void init_once(void *foo)
iint->version = 0;
iint->flags = 0UL;
mutex_init(&iint->mutex);
- iint->readcount = 0;
kref_init(&iint->refcount);
}
diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
index 24660bf3f82..2a77b14fee2 100644
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -86,17 +86,6 @@ out:
}
/*
- * Update the counts given an fmode_t
- */
-static void ima_inc_counts(struct ima_iint_cache *iint, fmode_t mode)
-{
- assert_spin_locked(&iint->inode->i_lock);
-
- if ((mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ)
- iint->readcount++;
-}
-
-/*
* ima_counts_get - increment file counts
*
* Maintain read/write counters for all files, but only
@@ -112,27 +101,23 @@ void ima_counts_get(struct file *file)
struct dentry *dentry = file->f_path.dentry;
struct inode *inode = dentry->d_inode;
fmode_t mode = file->f_mode;
- struct ima_iint_cache *iint;
int rc;
bool send_tomtou = false, send_writers = false;
- if (!iint_initialized || !S_ISREG(inode->i_mode))
+ if (!S_ISREG(inode->i_mode))
return;
- iint = ima_iint_find_get(inode);
- if (!iint)
- return;
- mutex_lock(&iint->mutex);
+
spin_lock(&inode->i_lock);
if (!ima_initialized)
goto out;
- rc = ima_must_measure(iint, inode, MAY_READ, FILE_CHECK);
+ rc = ima_must_measure(NULL, inode, MAY_READ, FILE_CHECK);
if (rc < 0)
goto out;
if (mode & FMODE_WRITE) {
- if (iint->readcount)
+ if (inode->i_readcount)
send_tomtou = true;
goto out;
}
@@ -140,10 +125,10 @@ void ima_counts_get(struct file *file)
if (atomic_read(&inode->i_writecount) > 0)
send_writers = true;
out:
- ima_inc_counts(iint, file->f_mode);
+ /* remember the vfs deals with i_writecount */
+ if ((mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ)
+ inode->i_readcount++;
spin_unlock(&inode->i_lock);
- mutex_unlock(&iint->mutex);
- kref_put(&iint->refcount, iint_free);
if (send_tomtou)
ima_add_violation(inode, dentry->d_name.name, "invalid_pcr",
@@ -166,9 +151,9 @@ static void ima_dec_counts(struct ima_iint_cache *iint, struct inode *inode,
assert_spin_locked(&inode->i_lock);
if ((mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ) {
- if (unlikely(iint->readcount == 0))
+ if (unlikely(inode->i_readcount == 0))
dump = true;
- iint->readcount--;
+ inode->i_readcount--;
}
if (mode & FMODE_WRITE) {
if (atomic_read(&inode->i_writecount) <= 0)
@@ -180,7 +165,7 @@ static void ima_dec_counts(struct ima_iint_cache *iint, struct inode *inode,
if (dump && !ima_limit_imbalance(file)) {
printk(KERN_INFO "%s: open/free imbalance (r:%u)\n",
- __func__, iint->readcount);
+ __func__, inode->i_readcount);
dump_stack();
}
}