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| author | Stephen Smalley <sds@tycho.nsa.gov> | 2008-06-09 16:03:56 -0400 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2008-07-14 15:01:59 +1000 |
| commit | 22df4adb049a5cbb340dd935f5bbfa1ab3947562 (patch) | |
| tree | 28dead43dd9eb81768e143ced4e9cd45c6a0246f /security/selinux | |
| parent | 89abd0acf0335f3f760a3c0698d43bb1eaa83e44 (diff) | |
| download | lwn-22df4adb049a5cbb340dd935f5bbfa1ab3947562.tar.gz lwn-22df4adb049a5cbb340dd935f5bbfa1ab3947562.zip | |
selinux: change handling of invalid classes (Was: Re: 2.6.26-rc5-mm1 selinux whine)
On Mon, 2008-06-09 at 01:24 -0700, Andrew Morton wrote:
> Getting a few of these with FC5:
>
> SELinux: context_struct_compute_av: unrecognized class 69
> SELinux: context_struct_compute_av: unrecognized class 69
>
> one came out when I logged in.
>
> No other symptoms, yet.
Change handling of invalid classes by SELinux, reporting class values
unknown to the kernel as errors (w/ ratelimit applied) and handling
class values unknown to policy as normal denials.
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Acked-by: Eric Paris <eparis@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security/selinux')
| -rw-r--r-- | security/selinux/ss/services.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c index 543fd0f31b33..04c0b70c8012 100644 --- a/security/selinux/ss/services.c +++ b/security/selinux/ss/services.c @@ -407,9 +407,19 @@ static int context_struct_compute_av(struct context *scontext, return 0; inval_class: - printk(KERN_ERR "SELinux: %s: unrecognized class %d\n", __func__, - tclass); - return -EINVAL; + if (!tclass || tclass > kdefs->cts_len || + !kdefs->class_to_string[tclass]) { + if (printk_ratelimit()) + printk(KERN_ERR "SELinux: %s: unrecognized class %d\n", + __func__, tclass); + return -EINVAL; + } + + /* + * Known to the kernel, but not to the policy. + * Handle as a denial (allowed is 0). + */ + return 0; } /* |