mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-28 23:23:55 +08:00
86a264abe5
Wrap current->cred and a few other accessors to hide their actual implementation. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: James Morris <jmorris@namei.org> Acked-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: James Morris <jmorris@namei.org>
43 lines
1.8 KiB
C
43 lines
1.8 KiB
C
#ifndef _LINUX_SECUREBITS_H
|
|
#define _LINUX_SECUREBITS_H 1
|
|
|
|
#define SECUREBITS_DEFAULT 0x00000000
|
|
|
|
/* When set UID 0 has no special privileges. When unset, we support
|
|
inheritance of root-permissions and suid-root executable under
|
|
compatibility mode. We raise the effective and inheritable bitmasks
|
|
*of the executable file* if the effective uid of the new process is
|
|
0. If the real uid is 0, we raise the effective (legacy) bit of the
|
|
executable file. */
|
|
#define SECURE_NOROOT 0
|
|
#define SECURE_NOROOT_LOCKED 1 /* make bit-0 immutable */
|
|
|
|
/* When set, setuid to/from uid 0 does not trigger capability-"fixup".
|
|
When unset, to provide compatiblility with old programs relying on
|
|
set*uid to gain/lose privilege, transitions to/from uid 0 cause
|
|
capabilities to be gained/lost. */
|
|
#define SECURE_NO_SETUID_FIXUP 2
|
|
#define SECURE_NO_SETUID_FIXUP_LOCKED 3 /* make bit-2 immutable */
|
|
|
|
/* When set, a process can retain its capabilities even after
|
|
transitioning to a non-root user (the set-uid fixup suppressed by
|
|
bit 2). Bit-4 is cleared when a process calls exec(); setting both
|
|
bit 4 and 5 will create a barrier through exec that no exec()'d
|
|
child can use this feature again. */
|
|
#define SECURE_KEEP_CAPS 4
|
|
#define SECURE_KEEP_CAPS_LOCKED 5 /* make bit-4 immutable */
|
|
|
|
/* Each securesetting is implemented using two bits. One bit specifies
|
|
whether the setting is on or off. The other bit specify whether the
|
|
setting is locked or not. A setting which is locked cannot be
|
|
changed from user-level. */
|
|
#define issecure_mask(X) (1 << (X))
|
|
#define issecure(X) (issecure_mask(X) & current_cred_xxx(securebits))
|
|
|
|
#define SECURE_ALL_BITS (issecure_mask(SECURE_NOROOT) | \
|
|
issecure_mask(SECURE_NO_SETUID_FIXUP) | \
|
|
issecure_mask(SECURE_KEEP_CAPS))
|
|
#define SECURE_ALL_LOCKS (SECURE_ALL_BITS << 1)
|
|
|
|
#endif /* !_LINUX_SECUREBITS_H */
|