linux-hardened/security
Oleg Nesterov 3b5e9e53c6 signals: cleanup security_task_kill() usage/implementation
Every implementation of ->task_kill() does nothing when the signal comes from
the kernel.  This is correct, but means that check_kill_permission() should
call security_task_kill() only for SI_FROMUSER() case, and we can remove the
same check from ->task_kill() implementations.

(sadly, check_kill_permission() is the last user of signal->session/__session
 but we can't s/task_session_nr/task_session/ here).

NOTE: Eric W.  Biederman pointed out cap_task_kill() should die, and I think
he is very right.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Serge Hallyn <serue@us.ibm.com>
Cc: Roland McGrath <roland@redhat.com>
Cc: Casey Schaufler <casey@schaufler-ca.com>
Cc: David Quigley <dpquigl@tycho.nsa.gov>
Cc: Eric Paris <eparis@redhat.com>
Cc: Harald Welte <laforge@gnumonks.org>
Cc: Pavel Emelyanov <xemul@openvz.org>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-30 08:29:34 -07:00
..
keys keys: explicitly include required slab.h header file. 2008-04-29 08:06:17 -07:00
selinux signals: cleanup security_task_kill() usage/implementation 2008-04-30 08:29:34 -07:00
smack signals: cleanup security_task_kill() usage/implementation 2008-04-30 08:29:34 -07:00
capability.c capabilities: implement per-process securebits 2008-04-28 08:58:26 -07:00
commoncap.c xattr: add missing consts to function arguments 2008-04-29 08:06:06 -07:00
device_cgroup.c cgroups: introduce cft->read_seq() 2008-04-29 08:06:10 -07:00
dummy.c Security: Make secctx_to_secid() take const secdata 2008-04-30 08:23:51 +10:00
inode.c Kobject: convert remaining kobject_unregister() to kobject_put() 2008-01-24 20:40:40 -08:00
Kconfig security: enhance DEFAULT_MMAP_MIN_ADDR description 2008-04-18 20:26:18 +10:00
Makefile cgroups: implement device whitelist 2008-04-29 08:06:09 -07:00
root_plug.c root_plug: use cap_task_prctl 2008-04-28 08:58:27 -07:00
security.c Security: Make secctx_to_secid() take const secdata 2008-04-30 08:23:51 +10:00