diff options
| author | Mimi Zohar <zohar@linux.vnet.ibm.com> | 2009-02-04 09:07:02 -0500 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2009-02-06 09:05:33 +1100 |
| commit | 1df9f0a73178718969ae47d813b8e7aab2cf073c (patch) | |
| tree | 6bd3d8838858f0e93acd8f7969b7d0e5ce2bfb08 /include | |
| parent | f4bd857bc8ed997c25ec06b56ef8064aafa6d4f3 (diff) | |
Integrity: IMA file free imbalance
The number of calls to ima_path_check()/ima_file_free()
should be balanced. An extra call to fput(), indicates
the file could have been accessed without first being
measured.
Although f_count is incremented/decremented in places other
than fget/fput, like fget_light/fput_light and get_file, the
current task must already hold a file refcnt. The call to
__fput() is delayed until the refcnt becomes 0, resulting
in ima_file_free() flagging any changes.
- add hook to increment opencount for IPC shared memory(SYSV),
shmat files, and /dev/zero
- moved NULL iint test in opencount_get()
Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/ima.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/ima.h b/include/linux/ima.h index dcc3664feee..6db30a328d9 100644 --- a/include/linux/ima.h +++ b/include/linux/ima.h @@ -19,6 +19,7 @@ extern void ima_inode_free(struct inode *inode); extern int ima_path_check(struct path *path, int mask); extern void ima_file_free(struct file *file); extern int ima_file_mmap(struct file *file, unsigned long prot); +extern void ima_shm_check(struct file *file); #else static inline int ima_bprm_check(struct linux_binprm *bprm) @@ -50,5 +51,10 @@ static inline int ima_file_mmap(struct file *file, unsigned long prot) { return 0; } + +static inline void ima_shm_check(struct file *file) +{ + return; +} #endif /* CONFIG_IMA_H */ #endif /* _LINUX_IMA_H */ |