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keys: ensure that ->match_free() is called in request_key_and_link()

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If check_cached_key() returns a non-NULL value, we still need to call
key_type::match_free() to undo key_type::match_preparse().

Fixes: 7743c48e54 ("keys: Cache result of request_key*() temporarily in task_struct")
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Eric Biggers 2019-08-30 16:52:26 +01:00 committed by Linus Torvalds
parent e8d6766f3c
commit 846d2db3e0
1 changed files with 1 additions and 1 deletions
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security/keys/request_key.c
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@ -595,7 +595,7 @@ struct key *request_key_and_link(struct key_type *type,
key = check_cached_key(&ctx);
if (key)
return key;
goto error_free;
/* search all the process keyrings for a key */
rcu_read_lock();