From adefdceef4c1cefee2678724cd57824c8ca80091 Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Mon, 1 Feb 2010 10:35:22 -0300 Subject: [PATCH] V4L/DVB: Fix the risk of an oops at dvb_dmx_release dvb_dmx_init tries to allocate virtual memory for 2 pointers: filter and feed. If the second vmalloc fails, filter is freed, but the pointer keeps pointing to the old place. Later, when dvb_dmx_release() is called, it will try to free an already freed memory, causing an OOPS. Reviewed-by: Andy Walls Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb/dvb-core/dvb_demux.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/media/dvb/dvb-core/dvb_demux.c b/drivers/media/dvb/dvb-core/dvb_demux.c index b78cfb7d1897..a78408e76e75 100644 --- a/drivers/media/dvb/dvb-core/dvb_demux.c +++ b/drivers/media/dvb/dvb-core/dvb_demux.c @@ -1246,6 +1246,7 @@ int dvb_dmx_init(struct dvb_demux *dvbdemux) dvbdemux->feed = vmalloc(dvbdemux->feednum * sizeof(struct dvb_demux_feed)); if (!dvbdemux->feed) { vfree(dvbdemux->filter); + dvbdemux->filter = NULL; return -ENOMEM; } for (i = 0; i < dvbdemux->filternum; i++) { -- 2.20.1