Automounter (autofs) segmentation faults
Issue:
The automounter (autofs) hangs when attempting to cd to a /net/nfs-server directory. The resulting hang produces a segmentation fault and a core file is generated.
Environment:
- Red Hat Enterprise Linux 6.3
- autofs-5.0.5-64.el6
A fix is targeted for inclusion in RHEL 6.4. There are at least 2 workarounds that prevent this crash from occurring:
- Downgrading to autofs-5.0.5-39.el6
- Comment out /net -hosts in /etc/auto.master if it is not used (i.e. the automount maps come from another source like LDAP)
This issue is directly correlated with the amount of exports being shared out by the NFS server. If the NFS server is sharing a large amount of export directories autofs cannot handle the resulting data flow in /net which results in a segmentation fault.
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