Bug 970830

Description of problem:
Don't know exact procedure to reproduce this.
SELinux is preventing /usr/libexec/ibus-engine-kkc (deleted) from 'mmap_zero' accesses on the memprotect .

*****  Plugin mmap_zero (53.1 confidence) suggests  **************************

If /usr/libexec/ibus-engine-kkc (deleted) は kernel で low メモリにmmapする必要はありません。
Then ハッカーから攻撃されている可能性があります。これは非常に危険なアクセスです。
Do
セキュリティ管理者にコンタクトし、この問題を報告してください。

*****  Plugin catchall_boolean (42.6 confidence) suggests  *******************

If control the ability to mmap a low area of the address space, as configured by /proc/sys/kernel/mmap_min_addr. がしたい
Then you must tell SELinux about this by enabling the 'mmap_low_allowed' boolean.
詳細情報については、'unconfined_selinux' man ページをご覧下さい。
Do
setsebool -P mmap_low_allowed 1

*****  Plugin catchall (5.76 confidence) suggests  ***************************

If ibus-engine-kkc (deleted) に、  memprotect の mmap_zero アクセスがデフォルトで許可されるべきです。   
Then バグとして報告してください。 
ローカルのポリシーモジュールを生成すると、 このアクセスを許可することができます。
Do
このアクセスを一時的に許可するには、以下を実行してください。:
# grep ibus-engine-kkc /var/log/audit/audit.log | audit2allow -M mypol
# semodule -i mypol.pp

Additional Information:
Source Context                unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1
                              023
Target Context                unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1
                              023
Target Objects                 [ memprotect ]
Source                        ibus-engine-kkc
Source Path                   /usr/libexec/ibus-engine-kkc (deleted)
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           
Policy RPM                    selinux-policy-3.11.1-97.fc18.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 3.9.4-200.fc18.i686 #1 SMP Fri May
                              24 20:35:02 UTC 2013 i686 i686
Alert Count                   3
First Seen                    2013-05-13 15:44:20 JST
Last Seen                     2013-06-05 11:32:23 JST
Local ID                      1ae5e6df-7fad-4a0d-8a9e-7992ac991c39

Raw Audit Messages
type=AVC msg=audit(1370399543.616:889): avc:  denied  { mmap_zero } for  pid=4594 comm="ibus-engine-kkc" scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tclass=memprotect


type=SYSCALL msg=audit(1370399543.616:889): arch=i386 syscall=mmap2 success=no exit=EACCES a0=0 a1=ca363 a2=1 a3=1 items=0 ppid=4339 pid=4594 auid=500 uid=500 gid=500 euid=500 suid=500 fsuid=500 egid=500 sgid=500 fsgid=500 ses=2 tty=(none) comm=ibus-engine-kkc exe=2F7573722F6C6962657865632F696275732D656E67696E652D6B6B63202864656C6574656429 subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key=(null)

Hash: ibus-engine-kkc,unconfined_t,unconfined_t,memprotect,mmap_zero

audit2allow

#============= unconfined_t ==============
#!!!! This avc can be allowed using the boolean 'mmap_low_allowed'

allow unconfined_t self:memprotect mmap_zero;

audit2allow -R
require {
	type unconfined_t;
	class memprotect mmap_zero;
}

#============= unconfined_t ==============
#!!!! This avc can be allowed using the boolean 'mmap_low_allowed'

allow unconfined_t self:memprotect mmap_zero;


Additional info:
reporter:       libreport-2.1.4
hashmarkername: setroubleshoot
kernel:         3.9.4-200.fc18.i686
type:           libreport