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fscrypt: clear keyring before calling key_put() 

Now that the key quotas are handled immediately on key_put() instead of
being postponed to the key management garbage collection worker, a call
to keyring_clear() is all that is required in fscrypt_put_master_key()
so that the keyring clean-up is also done synchronously.  This patch
should fix the fstest generic/581 flakiness.

Signed-off-by: Luis Henriques <lhenriques@suse.de>
Link: https://lore.kernel.org/r/20240206101619.8083-1-lhenriques@suse.de
[ebiggers: added comment]
Signed-off-by: Eric Biggers <ebiggers@google.com>
This commit is contained in:
Luis Henriques 2024-02-06 10:16:19 +00:00 committed by Eric Biggers
parent 5befc19cae
commit d3a7bd4200
1 changed files with 6 additions and 2 deletions
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8
fs/crypto/keyring.c
View File

@ -74,8 +74,12 @@ void fscrypt_put_master_key(struct fscrypt_master_key *mk)
* that concurrent keyring lookups can no longer find it.
*/
WARN_ON_ONCE(refcount_read(&mk->mk_active_refs) != 0);
key_put(mk->mk_users);
mk->mk_users = NULL;
if (mk->mk_users) {
/* Clear the keyring so the quota gets released right away. */
keyring_clear(mk->mk_users);
key_put(mk->mk_users);
mk->mk_users = NULL;
}
call_rcu(&mk->mk_rcu_head, fscrypt_free_master_key);
}