Bug 1258210
| Summary: | SELinux is preventing /opt/google/chrome/nacl_helper_bootstrap from 'mmap_zero' accesses on the memprotect Unknown. | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Otto J. Makela <om> |
| Component: | selinux-policy | Assignee: | Miroslav Grepl <mgrepl> |
| Status: | CLOSED DUPLICATE | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 22 | CC: | dominick.grift, dwalsh, lvrabec, mgrepl, plautrba |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | i686 | ||
| OS: | Unspecified | ||
| Whiteboard: | abrt_hash:c33ae18f1c9fab33802eeef9aa65328b3236c98b78b4dededd66b7a16052d5a2 | ||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2015-08-31 12:15:53 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
*** This bug has been marked as a duplicate of bug 859625 *** |
Description of problem: Starting Chrome normally. SELinux is preventing /opt/google/chrome/nacl_helper_bootstrap from 'mmap_zero' accesses on the memprotect Unknown. ***** Plugin mmap_zero (53.1 confidence) suggests ************************* If you do not think /opt/google/chrome/nacl_helper_bootstrap 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 allow mmap to low allowed Then you must tell SELinux about this by enabling the 'mmap_low_allowed' boolean. You can read 'None' man page for more details. Do setsebool -P mmap_low_allowed 1 ***** Plugin catchall (5.76 confidence) suggests ************************** If you believe that nacl_helper_bootstrap 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 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 Unknown [ memprotect ] Source nacl_helper_boo Source Path /opt/google/chrome/nacl_helper_bootstrap Port <Unknown> Host (removed) Source RPM Packages google-chrome-stable-44.0.2403.157-1.i386 Target RPM Packages Policy RPM selinux-policy-3.13.1-128.12.fc22.noarch Selinux Enabled True Policy Type targeted Enforcing Mode Enforcing Host Name (removed) Platform Linux (removed) 4.1.5-200.fc22.i686 #1 SMP Tue Aug 11 00:11:41 UTC 2015 i686 i686 Alert Count 23 First Seen 2015-08-28 22:13:11 EEST Last Seen 2015-08-30 13:00:28 EEST Local ID 31086ff6-d011-4a59-8e0c-c20e9b1a59ef Raw Audit Messages type=AVC msg=audit(1440928828.40:1072): avc: denied { mmap_zero } for pid=25507 comm="nacl_helper_boo" scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tclass=memprotect permissive=0 type=SYSCALL msg=audit(1440928828.40:1072): arch=i386 syscall=mmap2 success=no exit=EACCES a0=f000 a1=1000 a2=0 a3=4032 items=0 ppid=25505 pid=25507 auid=1000 uid=1000 gid=1000 euid=1000 suid=1000 fsuid=1000 egid=1000 sgid=1000 fsgid=1000 tty=tty2 ses=3 comm=nacl_helper_boo exe=/opt/google/chrome/nacl_helper_bootstrap subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key=(null) Hash: nacl_helper_boo,unconfined_t,unconfined_t,memprotect,mmap_zero Version-Release number of selected component: selinux-policy-3.13.1-128.12.fc22.noarch Additional info: reporter: libreport-2.6.2 hashmarkername: setroubleshoot kernel: 4.1.5-200.fc22.i686 type: libreport Potential duplicate: bug 859625