[app-emulation/qemu] sync with tree

app-emulation/qemu/files/qemu-2.5.0-ne2000-reg-check.patch

@@ -0,0 +1,37 @@
+From 415ab35a441eca767d033a2702223e785b9d5190 Mon Sep 17 00:00:00 2001
+From: Prasad J Pandit <pjp@fedoraproject.org>
+Date: Wed, 24 Feb 2016 11:41:33 +0530
+Subject: [PATCH] net: ne2000: check ring buffer control registers
+
+Ne2000 NIC uses ring buffer of NE2000_MEM_SIZE(49152)
+bytes to process network packets. Registers PSTART & PSTOP
+define ring buffer size & location. Setting these registers
+to invalid values could lead to infinite loop or OOB r/w
+access issues. Add check to avoid it.
+
+Reported-by: Yang Hongke <yanghongke@huawei.com>
+Tested-by: Yang Hongke <yanghongke@huawei.com>
+Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
+Signed-off-by: Jason Wang <jasowang@redhat.com>
+---
+ hw/net/ne2000.c | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/hw/net/ne2000.c b/hw/net/ne2000.c
+index e408083..f0feaf9 100644
+--- a/hw/net/ne2000.c
++++ b/hw/net/ne2000.c
+@@ -155,6 +155,10 @@ static int ne2000_buffer_full(NE2000State *s)
+ {
+     int avail, index, boundary;
+ 
++    if (s->stop <= s->start) {
++        return 1;
++    }
++
+     index = s->curpag << 8;
+     boundary = s->boundary << 8;
+     if (index < boundary)
+-- 
+2.7.4
+