Bug 809329 - SELinux is preventing /usr/bin/evolution from 'mmap_zero' accesses on the memprotect .
SELinux is preventing /usr/bin/evolution from 'mmap_zero' accesses on the mem...
Status: CLOSED DUPLICATE of bug 490753
Product: Fedora
Classification: Fedora
Component: evolution (Show other bugs)
i686 Unspecified
unspecified Severity unspecified
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Assigned To: Matthew Barnes
Fedora Extras Quality Assurance
Depends On:
  Show dependency treegraph
Reported: 2012-04-03 02:01 EDT by Mikhail
Modified: 2013-06-07 10:50 EDT (History)
7 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2013-06-07 10:50:58 EDT
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Regression: ---
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Documentation: ---
Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Mikhail 2012-04-03 02:01:01 EDT
libreport version: 2.0.10
executable:     /usr/bin/python
hashmarkername: setroubleshoot
kernel:         3.3.0-8.fc17.i686.PAE
time:           Вт. 03 апр. 2012 12:00:50

:SELinux is preventing /usr/bin/evolution from 'mmap_zero' accesses on the memprotect .
:*****  Plugin mmap_zero (53.1 confidence) suggests  **************************
:If you do not think /usr/bin/evolution should need to mmap low memory in the kernel.
:Then you may be under attack by a hacker, this is a very dangerous access.
: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.
:setsebool -P mmap_low_allowed 1
:*****  Plugin catchall (5.76 confidence) suggests  ***************************
:If you believe that evolution should be allowed mmap_zero access on the  memprotect by default.
:Then you should report this as a bug.
:You can generate a local policy module to allow this access.
:allow this access for now by executing:
:# grep pool /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                        pool
:Source Path                   /usr/bin/evolution
:Port                          <Unknown>
:Host                          (removed)
:Source RPM Packages           gnome-shell-3.3.90-1.fc17.i686
:Target RPM Packages           
:Policy RPM                    selinux-policy-3.10.0-95.fc17.noarch
:Selinux Enabled               True
:Policy Type                   targeted
:Enforcing Mode                Enforcing
:Host Name                     (removed)
:Platform                      Linux (removed)
:                              3.3.0-0.rc6.git0.2.fc17.i686.PAE #1 SMP Mon Mar 5
:                              17:02:45 UTC 2012 i686 i686
:Alert Count                   8094
:First Seen                    Пн. 05 марта 2012 23:54:24
:Last Seen                     Пн. 19 марта 2012 05:32:59
:Local ID                      c61401bf-4d1e-498d-bb2a-345ad45ecb35
:Raw Audit Messages
:type=AVC msg=audit(1332113579.904:1369): avc:  denied  { mmap_zero } for  pid=6792 comm="gnome-shell" 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(1332113579.904:1369): arch=i386 syscall=mmap2 success=no exit=EACCES a0=0 a1=1000 a2=3 a3=22 items=0 ppid=965 pid=6792 auid=1000 uid=1000 gid=1000 euid=1000 suid=1000 fsuid=1000 egid=1000 sgid=1000 fsgid=1000 tty=(none) ses=2 comm=gnome-shell exe=/usr/bin/gnome-shell subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key=(null)
:Hash: pool,unconfined_t,unconfined_t,memprotect,mmap_zero
:audit2allowunable to open /sys/fs/selinux/policy:  Permission denied
:audit2allow -Runable to open /sys/fs/selinux/policy:  Permission denied
Comment 1 Miroslav Grepl 2012-04-04 07:51:11 EDT
This access should not be needed.

Does everything work for you?
Comment 2 Milan Crha 2012-04-04 09:29:51 EDT
(In reply to comment #1)
> This access should not be needed.

Is there any way of getting a backtrace of the binary which caused it, to know from where it was committed, please? I'm afraid that this could also happen due to some memory corruption, addressing a space below certain limits. Miroslav, is it possible, from your point of view?
Comment 3 Eric Paris 2013-06-07 10:50:58 EDT

*** This bug has been marked as a duplicate of bug 490753 ***

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