diff mbox series

[5.8,100/124] rxrpc: Downgrade the BUG() for unsupported token type in rxrpc_read()

Message ID 20201012133151.699260037@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg KH Oct. 12, 2020, 1:31 p.m. UTC 
From: David Howells <dhowells@redhat.com>

[ Upstream commit 9a059cd5ca7d9c5c4ca5a6e755cf72f230176b6a ]

If rxrpc_read() (which allows KEYCTL_READ to read a key), sees a token of a
type it doesn't recognise, it can BUG in a couple of places, which is
unnecessary as it can easily get back to userspace.

Fix this to print an error message instead.

Fixes: 99455153d067 ("RxRPC: Parse security index 5 keys (Kerberos 5)")
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/rxrpc/key.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/net/rxrpc/key.c b/net/rxrpc/key.c
index d77e89766406a..32f46edcf7c67 100644
--- a/net/rxrpc/key.c
+++ b/net/rxrpc/key.c
@@ -1108,7 +1108,8 @@  static long rxrpc_read(const struct key *key,
 			break;
 
 		default: /* we have a ticket we can't encode */
-			BUG();
+			pr_err("Unsupported key token type (%u)\n",
+			       token->security_index);
 			continue;
 		}
 
@@ -1224,7 +1225,6 @@  static long rxrpc_read(const struct key *key,
 			break;
 
 		default:
-			BUG();
 			break;
 		}