sctp: handle invalid error codes without calling BUG()

[ Upstream commit a0067dfcd9418fd3b0632bc59210d120d038a9c6 ]

The sctp_sf_eat_auth() function is supposed to return enum sctp_disposition
values but if the call to sctp_ulpevent_make_authkey() fails, it returns
-ENOMEM.

This results in calling BUG() inside the sctp_side_effects() function.
Calling BUG() is an over reaction and not helpful.  Call WARN_ON_ONCE()
instead.

This code predates git.

Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/net/sctp/sm_sideeffect.c b/net/sctp/sm_sideeffect.c
index 463c4a58d2c36d2a975c9e771ead62bd8460a376..970c6a486a9b04441c4eb95c58070a71e6bb7529 100644 (file)
--- a/net/sctp/sm_sideeffect.c
+++ b/net/sctp/sm_sideeffect.c
@@ -1251,7 +1251,10 @@ static int sctp_side_effects(enum sctp_event_type event_type,
        default:
                pr_err("impossible disposition %d in state %d, event_type %d, event_id %d\n",
                       status, state, event_type, subtype.chunk);
-               BUG();
+               error = status;
+               if (error >= 0)
+                       error = -EINVAL;
+               WARN_ON_ONCE(1);
                break;
        }