[Bug 1316125] [NEW] Autofs leak file descriptors when reloaded (-HUP) and daemon may stop working on high # of shares/reloads

[Launchpad Bug Tracker]

You have been subscribed to a public bug by Rafael David Tinoco (inaddy):

[Impact]

 * Autofs leak file descriptors when reloaded (-HUP) and daemon may stop
working on high # of shares/reloads.

[Test Case]

1. Configure a simple direct mount:

# cat /etc/auto.master
/-	/etc/auto.direct

# cat /etc/auto.direct
/nfs	server:/nfs

2. Start the automounter and do NOT trigger the mount

3. Replace /etc/auto.direct with:

# cat /etc/auto.direct
/nfs/1	server:/nfs
/nfs/2	server:/nfs

4. Reload:

# kill -HUP $(pidof automount)

>From now on, every reload will leak a file descriptor:

# ls -la /proc/$(pidof automount)/fd | grep /nfs

lr-x------ 1 root root 64 Aug 14 22:08 11 -> /nfs
lr-x------ 1 root root 64 Aug 14 22:08 12 -> /nfs
lr-x------ 1 root root 64 Aug 14 22:08 13 -> /nfs
lr-x------ 1 root root 64 Aug 14 22:08 14 -> /nfs
lr-x------ 1 root root 64 Aug 14 22:08 5 -> /nfs

[Regression Potential]

 * based on upstream commit: autofs - version 5.0.7 - dd66c61a - file
descriptor leak when reloading automount daemon. Tested with the same
test case fix the error and not changing any other behavior.

[Other Info ]

-

** Affects: autofs5 (Ubuntu)
     Importance: Undecided
     Assignee: Rafael David Tinoco (inaddy)
         Status: In Progress


** Tags: autofs precise
-- 
Autofs leak file descriptors when reloaded (-HUP) and daemon may stop working on high # of shares/reloads
https://bugs.launchpad.net/bugs/1316125
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