diff options
| author | Stephen Smalley <sds@tycho.nsa.gov> | 2008-03-17 08:55:18 -0400 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2008-04-02 16:05:52 +1100 |
| commit | 0794c66d49885a2f615618ce4940434b5b067d84 (patch) | |
| tree | b01be53c424c7d4793f5673539c11d09fbbe2b5a | |
| parent | 0e81a8ae37687845f7cdfa2adce14ea6a5f1dd34 (diff) | |
selinux: handle files opened with flags 3 by checking ioctl permission
Handle files opened with flags 3 by checking ioctl permission.
Default to returning FILE__IOCTL from file_to_av() if the f_mode has neither
FMODE_READ nor FMODE_WRITE, and thus check ioctl permission on exec or
transfer, thereby validating such descriptors early as with normal r/w
descriptors and catching leaks of them prior to attempted usage.
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Acked-by: Eric Paris <eparis@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>
| -rw-r--r-- | security/selinux/hooks.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 41a049f50f58..c2fef7b12dc7 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -1630,6 +1630,12 @@ static inline u32 file_to_av(struct file *file) else av |= FILE__WRITE; } + if (!av) { + /* + * Special file opened with flags 3 for ioctl-only use. + */ + av = FILE__IOCTL; + } return av; } |