Fix a potential crash where the ARP state could be freed during processing.

1 files changed, 3 insertions, 0 deletions

diff --git a/arp.c b/arp.c
index 9943a212..bf1f4974 100644
--- a/arp.c
+++ b/arp.c
@@ -204,6 +204,9 @@ arp_read(void *arg)
 			return;
 		}
 		arp_packet(ifp, buf, (size_t)bytes);
+		/* Check we still have a state after processing. */
+		if ((state = ARP_CSTATE(ifp)) == NULL || state->fd == -1)
+			break;
 	}
 }