diff options
Diffstat (limited to 'security/integrity/ima/ima_main.c')
| -rw-r--r-- | security/integrity/ima/ima_main.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c index 871e356e8d6..f4e7266f5ae 100644 --- a/security/integrity/ima/ima_main.c +++ b/security/integrity/ima/ima_main.c @@ -66,6 +66,19 @@ void ima_file_free(struct file *file) return; mutex_lock(&iint->mutex); + if (iint->opencount <= 0) { + printk(KERN_INFO + "%s: %s open/free imbalance (r:%ld w:%ld o:%ld f:%ld)\n", + __FUNCTION__, file->f_dentry->d_name.name, + iint->readcount, iint->writecount, + iint->opencount, atomic_long_read(&file->f_count)); + if (!(iint->flags & IMA_IINT_DUMP_STACK)) { + dump_stack(); + iint->flags |= IMA_IINT_DUMP_STACK; + } + } + iint->opencount--; + if ((file->f_mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ) iint->readcount--; @@ -119,6 +132,7 @@ static int get_path_measurement(struct ima_iint_cache *iint, struct file *file, pr_info("%s dentry_open failed\n", filename); return rc; } + iint->opencount++; iint->readcount++; rc = ima_collect_measurement(iint, file); @@ -159,6 +173,7 @@ int ima_path_check(struct path *path, int mask) return 0; mutex_lock(&iint->mutex); + iint->opencount++; if ((mask & MAY_WRITE) || (mask == 0)) iint->writecount++; else if (mask & (MAY_READ | MAY_EXEC)) @@ -219,6 +234,21 @@ out: return rc; } +static void opencount_get(struct file *file) +{ + struct inode *inode = file->f_dentry->d_inode; + struct ima_iint_cache *iint; + + if (!ima_initialized || !S_ISREG(inode->i_mode)) + return; + iint = ima_iint_find_insert_get(inode); + if (!iint) + return; + mutex_lock(&iint->mutex); + iint->opencount++; + mutex_unlock(&iint->mutex); +} + /** * ima_file_mmap - based on policy, collect/store measurement. * @file: pointer to the file to be measured (May be NULL) @@ -242,6 +272,18 @@ int ima_file_mmap(struct file *file, unsigned long prot) return 0; } +/* + * ima_shm_check - IPC shm and shmat create/fput a file + * + * Maintain the opencount for these files to prevent unnecessary + * imbalance messages. + */ +void ima_shm_check(struct file *file) +{ + opencount_get(file); + return; +} + /** * ima_bprm_check - based on policy, collect/store measurement. * @bprm: contains the linux_binprm structure |