From 10bd2bb48a2291f3d7edc33fc3985c8cb4f7fd41 Mon Sep 17 00:00:00 2001
From: Alexandre Ratchov <alex@caoua.org>
Date: Tue, 16 Oct 2012 09:47:48 +0200
Subject: [PATCH] panic() if read buffer overruns

---
 sndiod/sock.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/sndiod/sock.c b/sndiod/sock.c
index 52b1617..7945b93 100644
--- a/sndiod/sock.c
+++ b/sndiod/sock.c
@@ -499,6 +499,17 @@ sock_rdata(struct sock *f)
 		buf = &f->midi->ibuf;
 
 	data = abuf_wgetblk(buf, &count) + f->rsize - f->rtodo;
+#ifdef DEBUG
+	/*
+	 * XXX: this can happen in MIDIOUT mode, since we dont
+	 *	have flow control
+	 */
+	if (count < f->rtodo) {
+		sock_log(f);
+		log_puts(": data read buffer overrun\n");
+		panic();
+	}
+#endif
 	n = read(f->fd, data, f->rtodo);
 	if (n < 0) {
 		if (errno == EFAULT) {