diff options
| author |   Kees Cook <kees.cook@canonical.com> | 2010-02-03 15:36:43 -0800 |
|---|---|---|
| committer |   James Morris <jmorris@namei.org> | 2010-02-04 14:20:12 +1100 |
| commit | 002345925e6c45861f60db6f4fc6236713fd8847 (patch) | |
| tree | d7849eafe1755116597166bbebf43e2bee86cb76 /include/linux/syslog.h | |
| parent | selinux: allow MLS->non-MLS and vice versa upon policy reload (diff) | |
| download | linux-dev-002345925e6c45861f60db6f4fc6236713fd8847.tar.xz linux-dev-002345925e6c45861f60db6f4fc6236713fd8847.zip | |
syslog: distinguish between /proc/kmsg and syscalls
This allows the LSM to distinguish between syslog functions originating
from /proc/kmsg access and direct syscalls. By default, the commoncaps
will now no longer require CAP_SYS_ADMIN to read an opened /proc/kmsg
file descriptor. For example the kernel syslog reader can now drop
privileges after opening /proc/kmsg, instead of staying privileged with
CAP_SYS_ADMIN. MAC systems that implement security_syslog have unchanged
behavior.
Signed-off-by: Kees Cook <kees.cook@canonical.com>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Acked-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'include/linux/syslog.h')
| -rw-r--r-- | include/linux/syslog.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/include/linux/syslog.h b/include/linux/syslog.h new file mode 100644 index 000000000000..5f02b1817be1 --- /dev/null +++ b/include/linux/syslog.h @@ -0,0 +1,29 @@ +/* Syslog internals + * + * Copyright 2010 Canonical, Ltd. + * Author: Kees Cook <kees.cook@canonical.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; see the file COPYING. If not, write to + * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#ifndef _LINUX_SYSLOG_H +#define _LINUX_SYSLOG_H + +#define SYSLOG_FROM_CALL 0 +#define SYSLOG_FROM_FILE 1 + +int do_syslog(int type, char __user *buf, int count, bool from_file); + +#endif /* _LINUX_SYSLOG_H */ |