[Bug 2065856] [NEW] SEGFAULTs in v4.3

[Launchpad Bug Tracker]

You have been subscribed to a public bug by Nick O'Connor (nick-oconnor):

[ Impact ]

 * Users experience SEGFAULTs when Ganesha fails to communicate with
Gluster, causing the NFS share to disappear.

 * The patch refactors how free_space() is called to avoid the null
pointer deference.

[ Test Plan ]

 * The triggers for the issue are difficult to replicate and have to do
with the timing of Ganesha communicating with Gluster. I have compiled
the patch against version 4.3-8ubuntu1 of nfs-ganesha and it resolved
the issue on my system.

[ Where problems could occur ]

 * Possible memory leaks, however this change has been part of nfs-
ganesha since v5. The latest version of nfs-ganesha is 5.7. I don't know
of other related issues.

[ Other Info ]

 * Commit which added this patch: https://github.com/nfs-ganesha/nfs-ganesha/commit/336abcba0b9e0dae0aadb4657c311d04862f2028
 * Issue discussion: https://github.com/nfs-ganesha/nfs-ganesha/issues/904

** Affects: nfs-ganesha (Ubuntu)
     Importance: Undecided
         Status: New

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SEGFAULTs in v4.3
https://bugs.launchpad.net/bugs/2065856
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