Description of problem: This problem started after adding libvirt and libvirt_guests to /etc/nsswitch.conf The result is that various services (NetworkManger is just one of them) use these NSS libraries for resolving hosts. The implementation of libvirt NSS libraries is trying to read /var/lib/libvirt/dnsmasq and access files under it. SELinux is preventing NetworkManager from 'read' accesses on the directory /var/lib/libvirt/dnsmasq. ***** Plugin catchall (100. confidence) suggests ************************** If you believe that NetworkManager should be allowed read access on the dnsmasq directory 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: # ausearch -c 'NetworkManager' --raw | audit2allow -M my-NetworkManager # semodule -X 300 -i my-NetworkManager.pp Additional Information: Source Context system_u:system_r:NetworkManager_t:s0 Target Context system_u:object_r:virt_var_lib_t:s0 Target Objects /var/lib/libvirt/dnsmasq [ dir ] Source NetworkManager Source Path NetworkManager Port <Unknown> Host (removed) Source RPM Packages Target RPM Packages libvirt-daemon-driver-network-3.2.1-6.fc26.x86_64 Policy RPM selinux-policy-3.13.1-260.13.fc26.noarch Selinux Enabled True Policy Type targeted Enforcing Mode Enforcing Host Name (removed) Platform Linux (removed) 4.13.9-200.fc26.x86_64 #1 SMP Mon Oct 23 13:52:45 UTC 2017 x86_64 x86_64 Alert Count 1 First Seen 2017-10-27 20:36:22 IDT Last Seen 2017-10-27 20:36:22 IDT Local ID 3de943c1-9197-4dfd-9d34-59d07600669a Raw Audit Messages type=AVC msg=audit(1509125782.224:517): avc: denied { read } for pid=1116 comm="NetworkManager" name="dnsmasq" dev="dm-0" ino=396384 scontext=system_u:system_r:NetworkManager_t:s0 tcontext=system_u:object_r:virt_var_lib_t:s0 tclass=dir permissive=0 Hash: NetworkManager,NetworkManager_t,virt_var_lib_t,dir,read Version-Release number of selected component: selinux-policy-3.13.1-260.13.fc26.noarch Additional info: component: selinux-policy reporter: libreport-2.9.1 hashmarkername: setroubleshoot kernel: 4.13.9-200.fc26.x86_64 type: libreport
Forgot to mention that libvirt-nss package supply the "libvirt" and "libvirt_guests" NSS libraries.
Same issue affects chronyd -- here is the detailed report: SELinux is preventing chronyd from read access on the directory /var/lib/libvirt/dnsmasq. ***** Plugin catchall (100. confidence) suggests ************************** If you believe that chronyd should be allowed read access on the dnsmasq directory 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: # ausearch -c 'chronyd' --raw | audit2allow -M my-chronyd # semodule -X 300 -i my-chronyd.pp Additional Information: Source Context system_u:system_r:chronyd_t:s0 Target Context system_u:object_r:virt_var_lib_t:s0 Target Objects /var/lib/libvirt/dnsmasq [ dir ] Source chronyd Source Path chronyd Port <Unknown> Host neon Source RPM Packages Target RPM Packages libvirt-daemon-driver-network-3.2.1-6.fc26.x86_64 Policy RPM selinux-policy-3.13.1-260.13.fc26.noarch Selinux Enabled True Policy Type targeted Enforcing Mode Enforcing Host Name neon Platform Linux neon 4.13.9-200.fc26.x86_64 #1 SMP Mon Oct 23 13:52:45 UTC 2017 x86_64 x86_64 Alert Count 2 First Seen 2017-10-27 20:41:12 IDT Last Seen 2017-10-27 21:11:05 IDT Local ID ede605e7-1c40-427e-88e7-0b3148057325 Raw Audit Messages type=AVC msg=audit(1509127865.167:527): avc: denied { read } for pid=972 comm="chronyd" name="dnsmasq" dev="dm-0" ino=396384 scontext=system_u:system_r:chronyd_t:s0 tcontext=system_u:object_r:virt_var_lib_t:s0 tclass=dir permissive=0 Hash: chronyd,chronyd_t,virt_var_lib_t,dir,read
Description of problem: I believe this problem was caused by modifying /etc/nsswith.conf as follows, so that VM names would be resolvable: hosts: files mdns4_minimal [NOTFOUND=return] libvirt dns myhostname Version-Release number of selected component: selinux-policy-3.13.1-260.18.fc26.noarch Additional info: reporter: libreport-2.9.1 hashmarkername: setroubleshoot kernel: 4.15.3-200.fc26.x86_64 type: libreport