From c7c35916692fe010fef25ac338443d3fe40be225 Mon Sep 17 00:00:00 2001 From: Prasad J Pandit Date: Fri, 21 Oct 2016 17:39:29 +0530 Subject: [PATCH] net: rtl8139: limit processing of ring descriptors RTL8139 ethernet controller in C+ mode supports multiple descriptor rings, each with maximum of 64 descriptors. While processing transmit descriptor ring in 'rtl8139_cplus_transmit', it does not limit the descriptor count and runs forever. Add check to avoid it. Reported-by: Andrew Henderson Signed-off-by: Prasad J Pandit Signed-off-by: Jason Wang --- hw/net/rtl8139.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/hw/net/rtl8139.c b/hw/net/rtl8139.c index 3345bc6..f05e59c 100644 --- a/hw/net/rtl8139.c +++ b/hw/net/rtl8139.c @@ -2350,7 +2350,7 @@ static void rtl8139_cplus_transmit(RTL8139State *s) { int txcount = 0; - while (rtl8139_cplus_transmit_one(s)) + while (txcount < 64 && rtl8139_cplus_transmit_one(s)) { ++txcount; } -- 1.7.0.4