diff options
| author |   Stephen Smalley <sds@tycho.nsa.gov> | 2008-02-07 11:21:04 -0500 |
|---|---|---|
| committer |   James Morris <jmorris@namei.org> | 2008-02-11 20:30:02 +1100 |
| commit | b68e418c445e8a468634d0a7ca2fb63bbaa74028 (patch) | |
| tree | e49b4a94ef28a9288ed6735a994387205b7cc5bd /security/selinux/hooks.c | |
| parent | Linux 2.6.25-rc1 (diff) | |
| download | linux-dev-b68e418c445e8a468634d0a7ca2fb63bbaa74028.tar.xz linux-dev-b68e418c445e8a468634d0a7ca2fb63bbaa74028.zip | |
selinux: support 64-bit capabilities
Fix SELinux to handle 64-bit capabilities correctly, and to catch
future extensions of capabilities beyond 64 bits to ensure that SELinux
is properly updated.
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security/selinux/hooks.c')
| -rw-r--r-- | security/selinux/hooks.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index e5ed07510309..44f16d9041e3 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -1272,12 +1272,18 @@ static int task_has_perm(struct task_struct *tsk1, SECCLASS_PROCESS, perms, NULL); } +#if CAP_LAST_CAP > 63 +#error Fix SELinux to handle capabilities > 63. +#endif + /* Check whether a task is allowed to use a capability. */ static int task_has_capability(struct task_struct *tsk, int cap) { struct task_security_struct *tsec; struct avc_audit_data ad; + u16 sclass; + u32 av = CAP_TO_MASK(cap); tsec = tsk->security; @@ -1285,8 +1291,19 @@ static int task_has_capability(struct task_struct *tsk, ad.tsk = tsk; ad.u.cap = cap; - return avc_has_perm(tsec->sid, tsec->sid, - SECCLASS_CAPABILITY, CAP_TO_MASK(cap), &ad); + switch (CAP_TO_INDEX(cap)) { + case 0: + sclass = SECCLASS_CAPABILITY; + break; + case 1: + sclass = SECCLASS_CAPABILITY2; + break; + default: + printk(KERN_ERR + "SELinux: out of range capability %d\n", cap); + BUG(); + } + return avc_has_perm(tsec->sid, tsec->sid, sclass, av, &ad); } /* Check whether a task is allowed to use a system operation. */ |