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| author | David Howells | 2012-10-13 11:46:48 +0200 |
|---|---|---|
| committer | David Howells | 2012-10-13 11:46:48 +0200 |
| commit | 607ca46e97a1b6594b29647d98a32d545c24bdff (patch) | |
| tree | 30f4c0784bfddb57332cdc0678bd06d1e77fa185 /include/uapi/linux/securebits.h | |
| parent | UAPI: Unexport linux/blk_types.h (diff) | |
| download | kernel-qcow2-linux-607ca46e97a1b6594b29647d98a32d545c24bdff.tar.gz kernel-qcow2-linux-607ca46e97a1b6594b29647d98a32d545c24bdff.tar.xz kernel-qcow2-linux-607ca46e97a1b6594b29647d98a32d545c24bdff.zip | |
UAPI: (Scripted) Disintegrate include/linux
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Michael Kerrisk <mtk.manpages@gmail.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Dave Jones <davej@redhat.com>
Diffstat (limited to 'include/uapi/linux/securebits.h')
| -rw-r--r-- | include/uapi/linux/securebits.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/include/uapi/linux/securebits.h b/include/uapi/linux/securebits.h new file mode 100644 index 000000000000..985aac9e6bf8 --- /dev/null +++ b/include/uapi/linux/securebits.h @@ -0,0 +1,51 @@ +#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)) + +#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 /* _UAPI_LINUX_SECUREBITS_H */ |