SELinux is preventing /usr/bin/skype from mmap_zero access on the memprotect Unknown.
***** Plugin mmap_zero (53.1 confidence) suggests **************************
If you do not think /usr/bin/skype should need to mmap low memory in the kernel.
Then you may be under attack by a hacker, this is a very dangerous access.
Do
contact your security administrator and report this issue.
***** Plugin catchall_boolean (42.6 confidence) suggests *******************
If you want to control the ability to mmap a low area of the address space, as configured by /proc/sys/kernel/mmap_min_addr.
Then you must tell SELinux about this by enabling the 'mmap_low_allowed' boolean.
Do
setsebool -P mmap_low_allowed 1
***** Plugin catchall (5.76 confidence) suggests ***************************
If you believe that skype should be allowed mmap_zero access on the Unknown memprotect by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# grep skype /var/log/audit/audit.log | audit2allow -M mypol
# semodule -i mypol.pp
Additional Information:
Source Context unconfined_u:unconfined_r:unconfined_execmem_t:s0-
s0:c0.c1023
Target Context unconfined_u:unconfined_r:unconfined_execmem_t:s0-
s0:c0.c1023
Target Objects Unknown [ memprotect ]
Source skype
Source Path /usr/bin/skype
Port <Unknown>
Host mobile-pc.localdomain
Source RPM Packages
Target RPM Packages
Policy RPM selinux-policy-3.9.7-40.fc14
Selinux Enabled True
Policy Type targeted
Enforcing Mode Enforcing
Host Name mobile-pc.localdomain
Platform Linux mobile-pc.localdomain
2.6.35.13-91.fc14.i686.PAE #1 SMP Tue May 3
13:29:55 UTC 2011 i686 i686
Alert Count 100
First Seen Mon 16 May 2011 03:37:35 PM EDT
Last Seen Mon 16 May 2011 03:37:35 PM EDT
Local ID 162a1493-50dc-4231-ad0f-808d6fe5330b
Raw Audit Messages
type=AVC msg=audit(1305574655.789:127): avc: denied { mmap_zero } for pid=2784 comm="skype" scontext=unconfined_u:unconfined_r:unconfined_execmem_t:s0-s0:c0.c1023 tcontext=unconfined_u:unconfined_r:unconfined_execmem_t:s0-s0:c0.c1023 tclass=memprotect
Hash: skype,unconfined_execmem_t,unconfined_execmem_t,memprotect,mmap_zero
audit2allow
#============= unconfined_execmem_t ==============
#!!!! This avc is allowed in the current policy
allow unconfined_execmem_t self:memprotect mmap_zero;
audit2allow -R
#============= unconfined_execmem_t ==============
#!!!! This avc is allowed in the current policy
allow unconfined_execmem_t self:memprotect mmap_zero;
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