Paul Dagnelie 99b281f1ae Fix double mutex_init bug in send code
It was possible to cause a kernel panic in the send code by 
initializing an already-initialized mutex, if a record was created 
with type DATA, destroyed with a different type (bypassing the 
mutex_destroy call) and then re-allocated as a DATA record again.

We tweak the logic to not change the type of a record once it has 
been created, avoiding the issue.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Jorgen Lundman <lundman@lundman.net>
Signed-off-by: Paul Dagnelie <pcd@delphix.com>
Closes #10374
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OpenZFS is an advanced file system and volume manager which was originally developed for Solaris and is now maintained by the OpenZFS community. This repository contains the code for running OpenZFS on Linux and FreeBSD.

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Official Resources

Installation

Full documentation for installing OpenZFS on your favorite Linux distribution can be found at the ZoL Site.

Contribute & Develop

We have a separate document with contribution guidelines.

We have a Code of Conduct.

Release

OpenZFS is released under a CDDL license. For more details see the NOTICE, LICENSE and COPYRIGHT files; UCRL-CODE-235197

Supported Kernels

  • The META file contains the officially recognized supported Linux kernel versions.
  • Supported FreeBSD versions are 12-STABLE and 13-CURRENT.
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