Description of problem: SELinux is preventing autofs from reading the global.map file on an NFS share even when use_nfs_home_dirs=1 . Nov 18 12:59:06 XXXX automount[4867]: Starting automounter version 5.0.3-15, master map auto.master Nov 18 12:59:06 XXXX automount[4867]: using kernel protocol version 5.00 Nov 18 12:59:06 XXXX automount[4867]: lookup(file): file map /xxx/dist/xxx/automaps/incr/common/etc/x.xxx.xxx.xxxx.xxx.com/global.map missing or not readable Nov 18 12:59:06 XXXX automount[4867]: mount_autofs_indirect: failed to read map for /.efsglobal Nov 18 12:59:06 XXXX automount[4867]: handle_mounts: mount of /.efsglobal failed! Nov 18 12:59:06 XXXX automount[4867]: master_do_mount: failed to startup mount Nov 18 12:59:06 XXXX automount[4867]: no mounts in table Nov 18 12:59:06 XXXX setroubleshoot: SELinux prevented automount from reading files stored on a NFS filesytem. For complete SELinux messages. run sealert -l 67a06831-1f71-407c-acf5-505bdffc125c [root@XXXX init.d]# sealert -l 67a06831-1f71-407c-acf5-505bdffc125c Summary: SELinux prevented automount from reading files stored on a NFS filesytem. Detailed Description: [SELinux is in permissive mode, the operation would have been denied but was permitted due to permissive mode.] SELinux prevented automount from reading files stored on a NFS filesystem. NFS (Network Filesystem) is a network filesystem commonly used on Unix / Linux systems. automount attempted to read one or more files or directories from a mounted filesystem of this type. As NFS filesystems do not support fine-grained SELinux labeling, all files and directories in the filesystem will have the same security context. If you have not configured automount to read files from a NFS filesystem this access attempt could signal an intrusion attempt. Allowing Access: Changing the "use_nfs_home_dirs" boolean to true will allow this access: "setsebool -P use_nfs_home_dirs=1" Fix Command: setsebool -P use_nfs_home_dirs=1 Additional Information: Source Context unconfined_u:system_r:automount_t:s0 Target Context system_u:object_r:nfs_t:s0 Target Objects ./global.map [ file ] Source automount Source Path /usr/sbin/automount Port <Unknown> Host XXXX.xxx.xxx.xx.xx.com Source RPM Packages autofs-5.0.3-15 Target RPM Packages Policy RPM selinux-policy-3.3.1-107.fc9 Selinux Enabled True Policy Type targeted MLS Enabled True Enforcing Mode Permissive Plugin Name use_nfs_home_dirs Host Name XXX.xxx.xxx.xx.xx.com Platform Linux XXXX.xxx.xxx.xx.xx.com 2.6.27.5-37.fc9.x86_64 #1 SMP Wed Nov 12 18:31:37 EST 2008 x86_64 x86_64 Alert Count 10 First Seen Fri Nov 14 14:39:14 2008 Last Seen Tue Nov 18 13:36:18 2008 Local ID 67a06831-1f71-407c-acf5-505bdffc125c Line Numbers Raw Audit Messages host=XXXX.xxx.xxx.xx.xx.com type=AVC msg=audit(1227033378.300:183): avc: denied { read } for pid=5096 comm="automount" name="global.map" dev=0:17 ino=2185111 scontext=unconfined_u:system_r:automount_t:s0 tcontext=system_u:object_r:nfs_t:s0 tclass=file host=XXXX.xxx.xxx.xx.xx.com type=SYSCALL msg=audit(1227033378.300:183): arch=c000003e syscall=21 success=yes exit=0 a0=7f1b47ca60f0 a1=4 a2=7f1b47ca07b0 a3=ccaa70 items=0 ppid=5090 pid=5096 auid=500 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=1 comm="automount" exe="/usr/sbin/automount" subj=unconfined_u:system_r:automount_t:s0 key=(null) [root@XXXX init.d]# getsebool -a | grep nfs allow_ftpd_use_nfs --> off allow_nfsd_anon_write --> off httpd_use_nfs --> off nfs_export_all_ro --> on nfs_export_all_rw --> on qemu_use_nfs --> on samba_share_nfs --> off use_nfs_home_dirs --> on virt_use_nfs --> off xen_use_nfs --> off Version-Release number of selected component (if applicable): uname -a Linux XXXX.xxx.xxx.xx.xx.com 2.6.27.5-37.fc9.x86_64 #1 SMP Wed Nov 12 18:31:37 EST 2008 x86_64 x86_64 x86_64 GNU/Linux [ How reproducible: Every time! Steps to Reproduce: 1. setsebool -P use_nfs_home_dirs=1 2. Setup autofs to use a global.map file from an NFS share. 3. Start autofs Actual results: autofs is blocked from reading file. Expected results: autofs will read file.
You can allow this for now. # audit2allow -M mypol -l -i /var/log/audit/audit.log # semodule -i mypol.pp Fixed in selinux-policy-3.3.1-112.fc9.noarch
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