[PATCH AUTOSEL 4.19 3/5] sctp: handle invalid error codes without calling BUG()

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From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

[ 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

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

This code predates git.

Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
 net/sctp/sm_sideeffect.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/net/sctp/sm_sideeffect.c b/net/sctp/sm_sideeffect.c
index 82d96441e64d6..c4a2d647e6cc7 100644
--- a/net/sctp/sm_sideeffect.c
+++ b/net/sctp/sm_sideeffect.c
@@ -1255,7 +1255,10 @@ static int sctp_side_effects(enum sctp_event event_type,
 		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;

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