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| 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 | |
| parent | 19af35546de68c872dcb687613e0902a602cb20e (diff) | |
| download | kernel-common-b68e418c445e8a468634d0a7ca2fb63bbaa74028.tar.gz kernel-common-b68e418c445e8a468634d0a7ca2fb63bbaa74028.tar.bz2 kernel-common-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')
| -rw-r--r-- | security/selinux/hooks.c | 21 | ||||
| -rw-r--r-- | security/selinux/include/av_perm_to_string.h | 3 | ||||
| -rw-r--r-- | security/selinux/include/av_permissions.h | 3 | ||||
| -rw-r--r-- | security/selinux/include/class_to_string.h | 1 | ||||
| -rw-r--r-- | security/selinux/include/flask.h | 1 |
5 files changed, 27 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. */ diff --git a/security/selinux/include/av_perm_to_string.h b/security/selinux/include/av_perm_to_string.h index 399f868c5c8f..d5696690d3a2 100644 --- a/security/selinux/include/av_perm_to_string.h +++ b/security/selinux/include/av_perm_to_string.h @@ -132,6 +132,9 @@ S_(SECCLASS_CAPABILITY, CAPABILITY__LEASE, "lease") S_(SECCLASS_CAPABILITY, CAPABILITY__AUDIT_WRITE, "audit_write") S_(SECCLASS_CAPABILITY, CAPABILITY__AUDIT_CONTROL, "audit_control") + S_(SECCLASS_CAPABILITY, CAPABILITY__SETFCAP, "setfcap") + S_(SECCLASS_CAPABILITY2, CAPABILITY2__MAC_OVERRIDE, "mac_override") + S_(SECCLASS_CAPABILITY2, CAPABILITY2__MAC_ADMIN, "mac_admin") S_(SECCLASS_NETLINK_ROUTE_SOCKET, NETLINK_ROUTE_SOCKET__NLMSG_READ, "nlmsg_read") S_(SECCLASS_NETLINK_ROUTE_SOCKET, NETLINK_ROUTE_SOCKET__NLMSG_WRITE, "nlmsg_write") S_(SECCLASS_NETLINK_FIREWALL_SOCKET, NETLINK_FIREWALL_SOCKET__NLMSG_READ, "nlmsg_read") diff --git a/security/selinux/include/av_permissions.h b/security/selinux/include/av_permissions.h index 84c9abc80978..75b41311ab86 100644 --- a/security/selinux/include/av_permissions.h +++ b/security/selinux/include/av_permissions.h @@ -533,6 +533,9 @@ #define CAPABILITY__LEASE 0x10000000UL #define CAPABILITY__AUDIT_WRITE 0x20000000UL #define CAPABILITY__AUDIT_CONTROL 0x40000000UL +#define CAPABILITY__SETFCAP 0x80000000UL +#define CAPABILITY2__MAC_OVERRIDE 0x00000001UL +#define CAPABILITY2__MAC_ADMIN 0x00000002UL #define NETLINK_ROUTE_SOCKET__IOCTL 0x00000001UL #define NETLINK_ROUTE_SOCKET__READ 0x00000002UL #define NETLINK_ROUTE_SOCKET__WRITE 0x00000004UL diff --git a/security/selinux/include/class_to_string.h b/security/selinux/include/class_to_string.h index b1b0d1d8f950..bd813c366e34 100644 --- a/security/selinux/include/class_to_string.h +++ b/security/selinux/include/class_to_string.h @@ -71,3 +71,4 @@ S_(NULL) S_(NULL) S_("peer") + S_("capability2") diff --git a/security/selinux/include/flask.h b/security/selinux/include/flask.h index 09e9dd23ee1a..febf8868e852 100644 --- a/security/selinux/include/flask.h +++ b/security/selinux/include/flask.h @@ -51,6 +51,7 @@ #define SECCLASS_DCCP_SOCKET 60 #define SECCLASS_MEMPROTECT 61 #define SECCLASS_PEER 68 +#define SECCLASS_CAPABILITY2 69 /* * Security identifier indices for initial entities |