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| author | Eric Biggers <ebiggers@google.com> | 2017-09-21 13:57:41 -0700 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2017-09-25 15:19:56 +0100 |
| commit | f7b48cf08fa63a68b59c2894806ee478216d7f91 (patch) | |
| tree | 49f1c5c64627568698ea5313c40ad193d84db664 | |
| parent | 44d8143340a99b167c74365e844516b73523c087 (diff) | |
| download | linux-f7b48cf08fa63a68b59c2894806ee478216d7f91.tar.gz linux-f7b48cf08fa63a68b59c2894806ee478216d7f91.tar.bz2 linux-f7b48cf08fa63a68b59c2894806ee478216d7f91.zip | |
KEYS: don't revoke uninstantiated key in request_key_auth_new()
If key_instantiate_and_link() were to fail (which fortunately isn't
possible currently), the call to key_revoke(authkey) would crash with a
NULL pointer dereference in request_key_auth_revoke() because the key
has not yet been instantiated.
Fix this by removing the call to key_revoke(). key_put() is sufficient,
as it's not possible for an uninstantiated authkey to have been used for
anything yet.
Fixes: b5f545c880a2 ("[PATCH] keys: Permit running process to instantiate keys")
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: David Howells <dhowells@redhat.com>
| -rw-r--r-- | security/keys/request_key_auth.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/security/keys/request_key_auth.c b/security/keys/request_key_auth.c index 69d6b3b35470..e356075ed2f8 100644 --- a/security/keys/request_key_auth.c +++ b/security/keys/request_key_auth.c @@ -220,7 +220,6 @@ struct key *request_key_auth_new(struct key *target, const void *callout_info, return authkey; error_put_authkey: - key_revoke(authkey); key_put(authkey); error_free_rka: free_request_key_auth(rka); |