George Amanakis 4fe5f9016f Add missing zfs_refcount_destroy() in key_mapping_rele()
Otherwise when running with reference_tracking_enable=TRUE mounting
and unmounting an encrypted dataset panics with:

Call Trace:
 dump_stack+0x66/0x90
 slab_err+0xcd/0xf2
 ? __kmalloc+0x174/0x260
 ? __kmem_cache_shutdown+0x158/0x240
 __kmem_cache_shutdown.cold+0x1d/0x115
 shutdown_cache+0x11/0x140
 kmem_cache_destroy+0x210/0x230
 spl_kmem_cache_destroy+0x122/0x3e0 [spl]
 zfs_refcount_fini+0x11/0x20 [zfs]
 spa_fini+0x4b/0x120 [zfs]
 zfs_kmod_fini+0x6b/0xa0 [zfs]
 _fini+0xa/0x68c [zfs]
 __x64_sys_delete_module+0x19c/0x2b0
 do_syscall_64+0x5b/0x1a0
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reviewed-By: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-By: Tom Caputi <tcaputi@datto.com>
Signed-off-by: George Amanakis <gamanakis@gmail.com>
Closes #10246
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ZFS on Linux is an advanced file system and volume manager which was originally developed for Solaris and is now maintained by the OpenZFS community.

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Official Resources

Installation

Full documentation for installing ZoL on your favorite Linux distribution can be found at our site.

Contribute & Develop

We have a separate document with contribution guidelines.

Release

ZFS on Linux 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 kernel versions.
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