| Summary: | SELinux is preventing nacl_helper_boo from 'mmap_zero' accesses on the memprotect Unknown. | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Ronald Pottol <ronaldpottol> |
| Component: | selinux-policy | Assignee: | Miroslav Grepl <mgrepl> |
| Status: | CLOSED ERRATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 16 | CC: | dominick.grift, dwalsh, kpj104, mgrepl, roland |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Unspecified | ||
| Whiteboard: | abrt_hash:52cde72a423a2d84878b3361a0af73a4b679fd465979f11d4e9e1200150d5cf2 | ||
| Fixed In Version: | selinux-policy-3.10.0-40.fc16 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2011-10-19 04:31:39 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
I am going to turn on the chrome_sandbox transition by default and then dontaudit this access. Ronald please turn on this boolean. setsebool -P unconfined_chrome_sandbox_transition 1 Fixed in selinux-policy-3.10.0-40.fc16 selinux-policy-3.10.0-40.fc16 has been submitted as an update for Fedora 16. https://admin.fedoraproject.org/updates/selinux-policy-3.10.0-40.fc16 Package selinux-policy-3.10.0-40.fc16: * should fix your issue, * was pushed to the Fedora 16 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing selinux-policy-3.10.0-40.fc16' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2011-14363 then log in and leave karma (feedback). selinux-policy-3.10.0-40.fc16 has been pushed to the Fedora 16 stable repository. If problems still persist, please make note of it in this bug report. I'm still getting this -- [kevinj@raykj Downloads]$ rpm -qi selinux-policy Name : selinux-policy Version : 3.10.0 Release : 40.fc16 Architecture: noarch Install Date: Mon 24 Oct 2011 08:04:34 AM EDT Group : System Environment/Base Size : 9075242 License : GPLv2+ Signature : RSA/SHA256, Fri 14 Oct 2011 12:56:29 PM EDT, Key ID 067f00b6a82ba4b7 Source RPM : selinux-policy-3.10.0-40.fc16.src.rpm Build Date : Fri 14 Oct 2011 09:53:39 AM EDT Build Host : x86-15.phx2.fedoraproject.org Relocations : (not relocatable) Packager : Fedora Project Vendor : Fedora Project URL : http://oss.tresys.com/repos/refpolicy/ Summary : SELinux policy configuration Description : SELinux Reference Policy - modular. Based off of reference policy: Checked out revision 2.20091117 Oct 24 09:04:15 raykj setroubleshoot: SELinux is preventing nacl_helper_boo from mmap_zero access on the memprotect Unknown. For complete SELinux messages. run sealert -l 8e793337-cca3-4672-93f2-02620d44739a Yes we are working with the google-chrome developers on this problem. |
libreport version: 2.0.6 executable: /usr/bin/python hashmarkername: setroubleshoot kernel: 3.1.0-0.rc8.git0.1.fc16.x86_64 reason: SELinux is preventing nacl_helper_boo from 'mmap_zero' accesses on the memprotect Unknown. time: Sat Oct 8 13:50:12 2011 description: :(note, first launch of Google Chrome Dev build) : :SELinux is preventing nacl_helper_boo from 'mmap_zero' accesses on the memprotect Unknown. : :***** Plugin mmap_zero (50.5 confidence) suggests ************************** : :If you do not think nacl_helper_boo 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 (40.5 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 (5.5 confidence) suggests **************************** : :If you believe that nacl_helper_boo 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 nacl_helper_boo /var/log/audit/audit.log | audit2allow -M mypol :# semodule -i mypol.pp : :***** Plugin leaks (5.5 confidence) suggests ******************************* : :If you want to ignore nacl_helper_boo trying to mmap_zero access the Unknown memprotect, because you believe it should not need this access. :Then you should report this as a bug. :You can generate a local policy module to dontaudit this access. :Do :# grep nacl_helper_boo /var/log/audit/audit.log | audit2allow -D -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 nacl_helper_boo :Source Path nacl_helper_boo :Port <Unknown> :Host (removed) :Source RPM Packages :Target RPM Packages :Policy RPM selinux-policy-3.10.0-32.fc16 :Selinux Enabled True :Policy Type targeted :Enforcing Mode Enforcing :Host Name (removed) :Platform Linux (removed) 3.1.0-0.rc8.git0.1.fc16.x86_64 #1 : SMP Tue Oct 4 03:16:40 UTC 2011 x86_64 x86_64 :Alert Count 1 :First Seen Sat 08 Oct 2011 01:48:29 PM PDT :Last Seen Sat 08 Oct 2011 01:48:29 PM PDT :Local ID 3f3001a7-61a4-4fc2-bf51-b2369345fded : :Raw Audit Messages :type=AVC msg=audit(1318106909.547:89): avc: denied { mmap_zero } for pid=13429 comm="nacl_helper_boo" 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 : : :type=SYSCALL msg=audit(1318106909.547:89): arch=x86_64 syscall=execve success=no exit=EACCES a0=7f3ef2b746f8 a1=7f3ef2baafe0 a2=7fff3629fec0 a3=7fff3629bd00 items=0 ppid=1 pid=13429 auid=1000 uid=1000 gid=1000 euid=1000 suid=1000 fsuid=1000 egid=1000 sgid=1000 fsgid=1000 tty=(none) ses=2 comm=nacl_helper_boo subj=unconfined_u:unconfined_r:unconfined_execmem_t:s0-s0:c0.c1023 key=(null) : :Hash: nacl_helper_boo,unconfined_execmem_t,unconfined_execmem_t,memprotect,mmap_zero : :audit2allow : :#============= unconfined_execmem_t ============== :#!!!! This avc can be allowed using the boolean 'mmap_low_allowed' : :allow unconfined_execmem_t self:memprotect mmap_zero; : :audit2allow -R : :#============= unconfined_execmem_t ============== :#!!!! This avc can be allowed using the boolean 'mmap_low_allowed' : :allow unconfined_execmem_t self:memprotect mmap_zero; :