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-rw-r--r--security/integrity/ima/ima.h4
-rw-r--r--security/integrity/ima/ima_iint.c4
-rw-r--r--security/integrity/ima/ima_main.c15
3 files changed, 14 insertions, 9 deletions
diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h
index 3d70108..000d13a 100644
--- a/security/integrity/ima/ima.h
+++ b/security/integrity/ima/ima.h
@@ -106,8 +106,8 @@ struct ima_iint_cache {
unsigned long flags;
u8 digest[IMA_DIGEST_SIZE];
struct mutex mutex; /* protects: version, flags, digest */
- long readcount; /* measured files readcount */
- long writecount; /* measured files writecount */
+ unsigned int readcount; /* measured files readcount */
+ unsigned int writecount;/* measured files writecount */
struct kref refcount; /* ima_iint_cache reference count */
};
diff --git a/security/integrity/ima/ima_iint.c b/security/integrity/ima/ima_iint.c
index 8e64313..db71a13 100644
--- a/security/integrity/ima/ima_iint.c
+++ b/security/integrity/ima/ima_iint.c
@@ -125,12 +125,12 @@ void iint_free(struct kref *kref)
iint->version = 0;
iint->flags = 0UL;
if (iint->readcount != 0) {
- printk(KERN_INFO "%s: readcount: %ld\n", __func__,
+ printk(KERN_INFO "%s: readcount: %u\n", __func__,
iint->readcount);
iint->readcount = 0;
}
if (iint->writecount != 0) {
- printk(KERN_INFO "%s: writecount: %ld\n", __func__,
+ printk(KERN_INFO "%s: writecount: %u\n", __func__,
iint->writecount);
iint->writecount = 0;
}
diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
index 995bd1b..5a1bf3d 100644
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -178,11 +178,18 @@ static void ima_dec_counts(struct ima_iint_cache *iint, struct inode *inode,
struct file *file)
{
mode_t mode = file->f_mode;
+ bool dump = false;
+
BUG_ON(!mutex_is_locked(&iint->mutex));
- if ((mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ)
+ if ((mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ) {
+ if (unlikely(iint->readcount == 0))
+ dump = true;
iint->readcount--;
+ }
if (mode & FMODE_WRITE) {
+ if (unlikely(iint->writecount == 0))
+ dump = true;
iint->writecount--;
if (iint->writecount == 0) {
if (iint->version != inode->i_version)
@@ -190,10 +197,8 @@ static void ima_dec_counts(struct ima_iint_cache *iint, struct inode *inode,
}
}
- if (((iint->readcount < 0) ||
- (iint->writecount < 0)) &&
- !ima_limit_imbalance(file)) {
- printk(KERN_INFO "%s: open/free imbalance (r:%ld w:%ld)\n",
+ if (dump && !ima_limit_imbalance(file)) {
+ printk(KERN_INFO "%s: open/free imbalance (r:%u w:%u)\n",
__func__, iint->readcount, iint->writecount);
dump_stack();
}
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