properly handle signed integer input

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.0@45336 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/channels/chan_skinny.c b/channels/chan_skinny.c
index 98d9d86d8ffb6e6db20e1927e232c71300e3b9bd..9de3faea689ae5320c8017f1bd1481de091eddc6 100644 (file)
--- a/channels/chan_skinny.c
+++ b/channels/chan_skinny.c
@@ -2305,6 +2305,10 @@ static int get_input(struct skinnysession *s)
                        return -1;
                }
                dlen = *(int *)s->inbuf;
+               if (dlen < 0) {
+                       ast_log(LOG_WARNING, "Skinny Client sent invalid data.\n");
+                       return -1;
+               }
                if (dlen+8 > sizeof(s->inbuf))
                        dlen = sizeof(s->inbuf) - 8;
                res = read(s->fd, s->inbuf+4, dlen+4);