Red Hat Bugzilla – Bug 924708
SELinux is preventing /usr/libexec/gdm-session-worker from 'remove_name' accesses on the directory nshadow.
Last modified: 2015-02-17 09:53:55 EST
Description of problem: Tried to log in as a new user for the first time. SELinux is preventing /usr/libexec/gdm-session-worker from 'remove_name' accesses on the directory nshadow. ***** Plugin catchall_labels (83.8 confidence) suggests ******************** If you want to allow gdm-session-worker to have remove_name access on the nshadow directory Then you need to change the label on nshadow Do # semanage fcontext -a -t FILE_TYPE 'nshadow' where FILE_TYPE is one of the following: admin_home_t, auth_cache_t, auth_home_t, cache_home_t, cgroup_t, config_home_t, data_home_t, dbus_home_t, faillog_t, fonts_cache_t, gconf_home_t, gnome_home_t, gstreamer_home_t, httpd_user_content_t, httpd_user_script_exec_t, icc_data_home_t, init_var_run_t, krb5_host_rcache_t, locale_t, mozilla_plugin_tmpfs_t, pam_var_console_t, pam_var_run_t, root_t, systemd_passwd_var_run_t, telepathy_cache_home_t, telepathy_data_home_t, tmp_t, tmpfs_t, user_fonts_t, user_home_dir_t, user_home_t, user_tmp_t, user_tmpfs_t, var_auth_t, var_lib_t, var_lock_t, var_log_t, var_run_t, var_spool_t, var_t, virt_home_t, xdm_home_t, xdm_log_t, xdm_rw_etc_t, xdm_spool_t, xdm_tmp_t, xdm_tmpfs_t, xdm_var_lib_t, xdm_var_run_t, xkb_var_lib_t, xserver_log_t. Then execute: restorecon -v 'nshadow' ***** Plugin catchall (17.1 confidence) suggests *************************** If you believe that gdm-session-worker should be allowed remove_name access on the nshadow 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: # grep gdm-session-wor /var/log/audit/audit.log | audit2allow -M mypol # semodule -i mypol.pp Additional Information: Source Context system_u:system_r:xdm_t:s0-s0:c0.c1023 Target Context system_u:object_r:etc_t:s0 Target Objects nshadow [ dir ] Source gdm-session-wor Source Path /usr/libexec/gdm-session-worker Port <Unknown> Host (removed) Source RPM Packages gdm-3.7.92-2.fc19.x86_64 Target RPM Packages Policy RPM selinux-policy-3.12.1-23.fc19.noarch Selinux Enabled True Policy Type targeted Enforcing Mode Permissive Host Name (removed) Platform Linux (removed) 3.9.0-0.rc3.git0.5.fc20.x86_64 #1 SMP Tue Mar 19 01:25:41 UTC 2013 x86_64 x86_64 Alert Count 1 First Seen 2013-03-22 06:54:49 EDT Last Seen 2013-03-22 06:54:49 EDT Local ID 2f7d0d19-d7c2-45a3-8b24-a7ce8f5f0043 Raw Audit Messages type=AVC msg=audit(1363949689.881:322): avc: denied { remove_name } for pid=2605 comm="gdm-session-wor" name="nshadow" dev="dm-0" ino=163367 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:etc_t:s0 tclass=dir type=AVC msg=audit(1363949689.881:322): avc: denied { rename } for pid=2605 comm="gdm-session-wor" name="nshadow" dev="dm-0" ino=163367 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:shadow_t:s0 tclass=file type=AVC msg=audit(1363949689.881:322): avc: denied { unlink } for pid=2605 comm="gdm-session-wor" name="shadow" dev="dm-0" ino=168482 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:shadow_t:s0 tclass=file type=SYSCALL msg=audit(1363949689.881:322): arch=x86_64 syscall=rename success=yes exit=0 a0=7f92fc72e972 a1=7f92fc72e8fc a2=7f93064377d8 a3=0 items=0 ppid=2522 pid=2605 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 ses=4294967295 tty=(none) comm=gdm-session-wor exe=/usr/libexec/gdm-session-worker subj=system_u:system_r:xdm_t:s0-s0:c0.c1023 key=(null) Hash: gdm-session-wor,xdm_t,etc_t,dir,remove_name audit2allow #============= xdm_t ============== allow xdm_t etc_t:dir remove_name; allow xdm_t shadow_t:file { rename unlink }; audit2allow -R require { type xdm_t; } #============= xdm_t ============== auth_manage_shadow(xdm_t) files_delete_etc_dir_entry(xdm_t) Additional info: hashmarkername: setroubleshoot kernel: 3.9.0-0.rc3.git0.5.fc20.x86_64 type: libreport
*** Bug 924707 has been marked as a duplicate of this bug. ***
*** Bug 924705 has been marked as a duplicate of this bug. ***
And you also see type=AVC msg=audit(1363949689.844:319): avc: denied { write } for pid=2605 comm="gdm-session-wor" name=".pwd.lock" dev="dm-0" ino=144564 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:passwd_file_t:s0 tclass=file type=SYSCALL msg=audit(1363949689.844:319): arch=x86_64 syscall=open success=yes exit=EACCES a0=7f93061fa27f a1=80041 a2=180 a3=30633a30732d3073 items=0 ppid=2522 pid=2605 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 ses=4294967295 tty=(none) comm=gdm-session-wor exe=/usr/libexec/gdm-session-worker subj=system_u:system_r:xdm_t:s0-s0:c0.c1023 key=(null) Hash: gdm-session-wor,xdm_t,passwd_file_t,file,write audit2allow #============= xdm_t ============== allow xdm_t passwd_file_t:file write; audit2allow -R require { type xdm_t; } #============= xdm_t ============== auth_manage_passwd(xdm_t)
*** Bug 924699 has been marked as a duplicate of this bug. ***
>Tried to log in as a new user for the first time. After install? Or did you just add a user without password setup?
Did xdm try to reset a password at login?
I have booted live DVD, added new user, but set password to "ask for password on first login" and then logged on.
Is gdm manipulating the /etc/shadow directly?
Description of problem: 1. Create user in gnome-control-center user-accounts 2. In field password use "Choose password at next login" 3. Switch to new user in GDM 4. AVC Additional info: hashmarkername: setroubleshoot kernel: 3.9.0-0.rc5.git1.301.fc19.x86_64 type: libreport
Can gdm use a helper app for this like sshd does? /usr/sbin/unix_update
Not reproduced. I think that can close bug.
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Fedora 19 changed to end-of-life (EOL) status on 2015-01-06. Fedora 19 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed.