[PATCH 1/3] acd: move l_acd_stop ahead of EVENT_CONFLICT

Stopping ACD after the event callback results in an invalid read if
the callback destroyed the ACD object. Stopping ACD prior resolves
this and is consistent with other call sites.
---
 ell/acd.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/ell/acd.c b/ell/acd.c
index b913c9b..e7ad416 100644
--- a/ell/acd.c
+++ b/ell/acd.c
@@ -283,11 +283,11 @@ static bool acd_read_handler(struct l_io *io, void *user_data)
 				target_conflict ? "Target" : "Source",
 				NIPQUAD(acd->ip));
 
+		l_acd_stop(acd);
+
 		if (acd->event_func)
 			acd->event_func(L_ACD_EVENT_CONFLICT, acd->user_data);
 
-		l_acd_stop(acd);
-
 		break;
 	case ACD_STATE_ANNOUNCED:
 		/* Only defend packets with a source conflict */
-- 
2.34.1