mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-15 04:16:44 +07:00
746bf6d642
Per Andrew Morgan's request, add a securebit to allow admins to disable PR_CAP_AMBIENT_RAISE. This securebit will prevent processes from adding capabilities to their ambient set. For simplicity, this disables PR_CAP_AMBIENT_RAISE entirely rather than just disabling setting previously cleared bits. Signed-off-by: Andy Lutomirski <luto@kernel.org> Acked-by: Andrew G. Morgan <morgan@kernel.org> Acked-by: Serge Hallyn <serge.hallyn@canonical.com> Cc: Kees Cook <keescook@chromium.org> Cc: Christoph Lameter <cl@linux.com> Cc: Serge Hallyn <serge.hallyn@canonical.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Aaron Jones <aaronmdjones@gmail.com> Cc: Ted Ts'o <tytso@mit.edu> Cc: Andrew G. Morgan <morgan@kernel.org> Cc: Mimi Zohar <zohar@linux.vnet.ibm.com> Cc: Austin S Hemmelgarn <ahferroin7@gmail.com> Cc: Markku Savela <msa@moth.iki.fi> Cc: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: James Morris <james.l.morris@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
61 lines
2.6 KiB
C
61 lines
2.6 KiB
C
#ifndef _UAPI_LINUX_SECUREBITS_H
|
|
#define _UAPI_LINUX_SECUREBITS_H
|
|
|
|
/* 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 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 */
|
|
|
|
#define SECBIT_NOROOT (issecure_mask(SECURE_NOROOT))
|
|
#define SECBIT_NOROOT_LOCKED (issecure_mask(SECURE_NOROOT_LOCKED))
|
|
|
|
/* 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 */
|
|
|
|
#define SECBIT_NO_SETUID_FIXUP (issecure_mask(SECURE_NO_SETUID_FIXUP))
|
|
#define SECBIT_NO_SETUID_FIXUP_LOCKED \
|
|
(issecure_mask(SECURE_NO_SETUID_FIXUP_LOCKED))
|
|
|
|
/* 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 */
|
|
|
|
#define SECBIT_KEEP_CAPS (issecure_mask(SECURE_KEEP_CAPS))
|
|
#define SECBIT_KEEP_CAPS_LOCKED (issecure_mask(SECURE_KEEP_CAPS_LOCKED))
|
|
|
|
/* When set, a process cannot add new capabilities to its ambient set. */
|
|
#define SECURE_NO_CAP_AMBIENT_RAISE 6
|
|
#define SECURE_NO_CAP_AMBIENT_RAISE_LOCKED 7 /* make bit-6 immutable */
|
|
|
|
#define SECBIT_NO_CAP_AMBIENT_RAISE (issecure_mask(SECURE_NO_CAP_AMBIENT_RAISE))
|
|
#define SECBIT_NO_CAP_AMBIENT_RAISE_LOCKED \
|
|
(issecure_mask(SECURE_NO_CAP_AMBIENT_RAISE_LOCKED))
|
|
|
|
#define SECURE_ALL_BITS (issecure_mask(SECURE_NOROOT) | \
|
|
issecure_mask(SECURE_NO_SETUID_FIXUP) | \
|
|
issecure_mask(SECURE_KEEP_CAPS) | \
|
|
issecure_mask(SECURE_NO_CAP_AMBIENT_RAISE))
|
|
#define SECURE_ALL_LOCKS (SECURE_ALL_BITS << 1)
|
|
|
|
#endif /* _UAPI_LINUX_SECUREBITS_H */
|