keys: ensure that ->match_free() is called in request_key_and_link()
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State New
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  • keys: ensure that ->match_free() is called in request_key_and_link()
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Commit Message

David Howells Aug. 30, 2019, 3:52 p.m. UTC
From: Eric Biggers <>

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: 7743c48e54ee ("keys: Cache result of request_key*() temporarily in task_struct")
Signed-off-by: Eric Biggers <>
Signed-off-by: David Howells <>

 security/keys/request_key.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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diff --git a/security/keys/request_key.c b/security/keys/request_key.c
index 7325f382dbf4..957b9e3e1492 100644
--- a/security/keys/request_key.c
+++ b/security/keys/request_key.c
@@ -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 */