From: Josef Bacik <jo...@toxicpanda.com>

btrfs has a variety of asynchronous things we do with inodes that can
potentially last until ->put_super, when we shut everything down and
clean up all of our async work.  Due to this we need to move
fscrypt_destroy_keyring() to after ->put_super, otherwise we get
warnings about still having active references on the master key.

Signed-off-by: Josef Bacik <jo...@toxicpanda.com>
Signed-off-by: Eric Biggers <ebigg...@google.com>
---
 fs/super.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/fs/super.c b/fs/super.c
index 076392396e724..faf7d248145d2 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -674,34 +674,34 @@ void generic_shutdown_super(struct super_block *sb)
                /* Evict all inodes with zero refcount. */
                evict_inodes(sb);
 
                /*
                 * Clean up and evict any inodes that still have references due
                 * to fsnotify or the security policy.
                 */
                fsnotify_sb_delete(sb);
                security_sb_delete(sb);
 
-               /*
-                * Now that all potentially-encrypted inodes have been evicted,
-                * the fscrypt keyring can be destroyed.
-                */
-               fscrypt_destroy_keyring(sb);
-
                if (sb->s_dio_done_wq) {
                        destroy_workqueue(sb->s_dio_done_wq);
                        sb->s_dio_done_wq = NULL;
                }
 
                if (sop->put_super)
                        sop->put_super(sb);
 
+               /*
+                * Now that all potentially-encrypted inodes have been evicted,
+                * the fscrypt keyring can be destroyed.
+                */
+               fscrypt_destroy_keyring(sb);
+
                if (CHECK_DATA_CORRUPTION(!list_empty(&sb->s_inodes),
                                "VFS: Busy inodes after unmount of %s (%s)",
                                sb->s_id, sb->s_type->name)) {
                        /*
                         * Adding a proper bailout path here would be hard, but
                         * we can at least make it more likely that a later
                         * iput_final() or such crashes cleanly.
                         */
                        struct inode *inode;
 
-- 
2.43.0


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