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[Qemu-trivial] [PATCH] char: fix missing return in error path for charde

From: Daniel P. Berrange
Subject: [Qemu-trivial] [PATCH] char: fix missing return in error path for chardev TLS init
Date: Fri, 30 Sep 2016 16:02:01 +0100

If the qio_channel_tls_new_(server|client) methods fail,
we disconnect the client. Unfortunately a missing return
means we then go on to try and run the TLS handshake on
a NULL I/O channel. This gives predictably segfaulty

The main way to trigger this is to request a bogus TLS
priority string for the TLS credentials. e.g.

  -object tls-creds-x509,id=tls0,priority=wibble,...

Most other ways appear impossible to trigger except
perhaps if OOM conditions cause gnutls initialization
to fail.

Signed-off-by: Daniel P. Berrange <address@hidden>
 qemu-char.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/qemu-char.c b/qemu-char.c
index fb456ce..48a45ef 100644
--- a/qemu-char.c
+++ b/qemu-char.c
@@ -3132,6 +3132,7 @@ static void tcp_chr_tls_init(CharDriverState *chr)
     if (tioc == NULL) {
+        return;
     s->ioc = QIO_CHANNEL(tioc);

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