[Bugs] [Bug 1238049] Crash in Quota enforcer

bugzilla at redhat.com bugzilla at redhat.com
Wed Jul 1 11:27:01 UTC 2015


https://bugzilla.redhat.com/show_bug.cgi?id=1238049



--- Comment #2 from Vijaikumar Mallikarjuna <vmallika at redhat.com> ---
Here is the RCA for the crash:

There are two problems here:
1) When a rename operation is performed continuously, some how old entry is not
removed from inode_ctx parents list

2) Because of problem 1, now there are multiple parents for a file (one is
stale entry), check_quota_limit is invoked for each parent, and each of this
check_limit can invoke validation (also we have multi-threaded epoll). This
will cause frame->local to get corrupted during validation.
   This problem can also happen when there are multiple hard link

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